Hydrology and Water Resources Engineering MCQS, water resources multiple choice question and answer, hydrogeology MCQ,
Hydrology and Water Resources Engineering MCQS, water resources multiple choice question and answer, hydrogeology MCQ,
Hydrology and
Water Resources Engineering MCQs
Question No. 01
Generally, the weir is aligned at
right angles to the direction of the main river current because
(A) It ensures less length of the
weir
(B) It gives better discharging
capacity
(C) It is economical
(D) All of the above
Answer: Option D
Question No. 02
A straight glacis type fall with a
baffle platform and a baffle wall is called
(A) Vertical drop-fall
(B) Glacis fall
(C) Montague type fall
(D) Inglis fall
Answer: Option D
Question No. 03
The meander pattern of a river is
developed by
(A) Average discharge
(B) Dominant discharge
(C) Maximum discharge
(D) Critical discharge
Answer: Option B
Question No. 04
The ratio of the average load to
the installed capacity of the plant whose reserve capacity is zero
will be equal to
(A) Load factor
(B) Plant factor
(C) Utilization factor
(D) Both (A) and (B)
Answer: Option D
Question No. 05
Hydrology and Water Resources Engineering MCQS, water resources multiple choice question and answer, hydrogeology MCQ,
The most suitable chemical which
can be applied to the water surface for reducing evaporation is
(A) Methyl alcohol
(B) Ethyl alcohol
(C) Cetyl alcohol
(D) Butyl alcohol
Answer: Option C
Question No. 06
The shape of the recession limb of a
hydrograph depends upon
(A) Basin characteristics only
(B) Storm characteristics only
(C) Both (A) and (B)
(D) None of the above
Answer: Option A
Question No. 07
If the critical shear stress of a channel is XC, then the average value of shear stress
required to
move the grain on the bank is
(A) 0.5 XC
(B)
0.75 TC
(C)
XC
(D) 1.33 TC
Answer: Option B
Question No. 08
The flow of water after spilling
over the weir crest in chute spillway and side-channel spillway
respectively are
(A) At right angle and parallel to
weir crest
(B) Parallel and at the right angle to
weir crest
(C) Parallel to weir crest in both
(D) At a right angle to weir crest in
both
Answer: Option A
Question No. 09
Hydrodynamic pressure due to
earthquake acts at a height of
(A) 3H/4 above the base
(B) 3H/4 below the water surface
(C) 4H/3 above the base
(D) 4H below the water surface,
where H
is
the depth of water.
Answer: Option C
Question No. 10
Select the correct statement.
(A) A meander increases the river
length but a cut off reduces the river length
(B) A cut-off increases the river
length but a meander reduces the river length
(C) Both meander and cut-off
increase the river length
(D) Both meander and cut-off
decrease the river length
Answer: Option A
Question No. 11
Select the incorrect statement.
(A) Intensive irrigation should be
avoided in areas susceptible to water logging
(B) Extensive irrigation should be
adopted in areas susceptible to water logging
(C) Lift irrigation increases water
logging
(D) All of the above
Answer: Option C
Question No. 12
In India, which of the following is
adopted as standard recording rain-gauge?
(A) -gauge
(B) Tipping bucket type
(C) Natural syphon type
(D) Weighing bucket type
Answer: Option C
Question No. 13
The flow-mass curve is graphical
representation of
(A) Cumulative discharge and time
(B) Discharge and percentage
probability of flow being equalled or exceeded
(C) Cumulative discharge, volume
and time in chronological order
(D) Discharge and time in
chronological order
Answer: Option C
Question No. 14
Main purpose of mean water training
for rivers is
(A) Flood control
(B) To provide sufficient depth of
water in navigable channels, during low water periods
(C) To preserve the channel in good
shape by efficient disposal of suspended and bed load
(D) All of the above
Answer: Option C
Question No. 15
A divide wall is provided
(A) At right angle to the axis of
weir
(B) Parallel to the axis of weir
and upstream of it
(C) Parallel to the axis of weir
and downstream of it
(D) At an inclination to the axis
of weir
Answer: Option A
Question No. 16
Isohyets are the imaginary lines
joining the points of equal
(A) Pressure
(B) Height
(C) Humidity
(D) Rainfall
Answer: Option D
Question No. 17
(A) Directly proportional to
average particle size
(B) Inversely proportional to
average particle size
(C) Directly proportional to square
root of average particle size
(D) Not related to average particle
size
Answer: Option C
Question No. 18
The time required by rain water to
reach the outlet of drainage basin, is generally called
(A) Time of concentration
(B) Time of overland flow
(C) Concentration time of overland
flow
(D) Duration of the rainfall
Answer: Option A
Question No. 19
Which of the following is a
flexible outlet?
(A) Submerged pipe outlet
(B)
(C)
(D) None of the above
Answer: Option B
Question No. 20
Pick up the correct statement from
the following:
(A) The specified duration of unit
hydrograph, is called unit duration
(B) The rain during specified
duration, is called unit storm
(C) The number of unit hydrographs
for a given basin, is theoretically infinite
(D) All the above
Answer: Option D
Question No. 21
The drainage water intercepting the
canal can be disposed of by passing the canal below the
drainage in
(A) Aqueduct and syphon aqueduct
(B) Aqueduct and super passage
(C) Super passage and canal syphon
(D) Level crossing
Answer: Option C
Question No. 22
River training for depth is
achieved by
(A) Groynes
(B) Construction of dykes or leaves
(C) Both (A) and (B)
(D) Groynes and bandalling
Answer: Option D
Question No. 23
Pick up the correct statement from
the following:
(A) A confined bed of impervious
material laid over an aquifer, is known as an aquiclude
(B) The top most water bearing
strata having no aquifer, is known as non-artesian aquifer
(C) The ordinary gravity wells
which supply water from the top most water bearing strata, are
called water table wells
(D) All the above
Answer: Option D
Question No. 24
The rate of rainfall for successive
10 minute periods of a 60 minute duration storm, are shown in
the below figure. If the value of index
is
3 cm/hour, the runoff will be
(A) 2 cm
(B) 3 cm
(C) 4 cm
(D) 5 cm
Answer: Option B
Question No. 25
A land is known as waterlogged
(A) When the permanent wilting
point is reached
(B) When gravity drainage has
ceased
(C) Capillary fringe reaches the
root zone of plants
(D) None of the above
Answer: Option C
Question No. 26
Boston society of Civil Engineer's
formula Q
=
0.0056 × (D/t) in cumecs/square
km is based upon
(A) Rainfall and drainage area
(B) Total run off and drainage area
(C) Drainage area and its shape
(D) Drainage area
Answer: Option B
Question No. 27
A hyetograph is a graphical
representation of
(A) Rainfall intensity and time
(B) Rainfall depth and time
(C) Discharge and time
(D) Cumulative rainfall and time
Answer: Option A
Question No. 28
Pick up the correct statement from
the following:
(A) Hydrograph is a plot of
discharge and time
(B) In hydrographs, time is plotted
on X-axis
(C) The maximum flow in the river
due to rainfall, is called peak flow
(D) All the above
Answer: Option D
Question No. 29
Which of the following methods is
used to estimate flood discharge based on high water marks
left over in the past?
(A) Slope-area method
(B) Area-velocity method
(C) Moving boat method
(D) Ultrasonic method
Answer: Option A
Question No. 30
If the dew point is greater than 0°C
(A) Dew will be formed
(B) Frost will be formed
(C) Vapours will be formed
(D) None of these
Answer: Option A
Question No. 31
For a catchment area of 120 km²,
the equilibrium discharge in m3/hour of a Scurve obtained by
the summation of 6 hour unit hydro
graph is
(A) 0.2 × 106
(B) 0.6 × 106
(C) 2.4 × 106
(D) 7.2 × 106
Answer: Option A
Question No. 32
The specifications of most commonly
used standard gauges in India, are
(A) 200 sq. cm collector and 4
litres bottle
(B) 100 sq. cm collector and 2
litres bottle
(C) 200 sq. cm collector and 10
litres bottle
(D) 100 sq. cm collector and 4
litres bottle
Answer: Option A
Question No. 33
For an annual flood series arranged
in descending order of magnitude, the return for a magnitude
in a total is
(A) N/(m + l)
(B) m/(N + l)
(C) m/N
(D) (N + l)/m
Answer: Option D
Question No. 34
A control meter is preferred to a
weir because
(A) It measures the discharge even
in silt Leiden streams
(B) The velocity of approach of the
channel increases above the control, and thus removes the
silt completely
(C) It is not damaged by floating
debris
(D) All the above
Answer: Option D
Question No. 35
The uplift pressure on the face of
a drainage gallery in a dam is taken as
(A) Hydrostatic pressure at toe
(B) Average of hydrostatic pressure
at toe and heel
(C) Two-third of hydrostatic
pressure at toe plus one-third of hydrostatic pressure at heel
(D) None of the above
Answer: Option C
Question No. 36
The elevation Z of the watershed
is: (where letters carry their usual meanings)
(A) Reduced level of the top most
point of the basin
(B) Reduced level of the lower most
point of the basin
(C) Average elevation of the
highest and lowest point of the drainage basin
(D) Obtained by the formula Z = + + + anzn)/A
Answer: Option D
Question No. 37
As compared to gravity dams,
earthen dams
(A) Are costlier
(B) Are less susceptible to failure
(C) Require sound rock foundations
(D) Require less skilled labour
Answer: Option D
Question No. 38
The radius of influence is
(A) Radius of the main well
(B) Distance from the wall of main
well to the point of zero draw down
(C) Distance from the centre of main
well to the point of zero draw down
(D) None of these
Answer: Option C
Question No. 39
In case of non-availability of
space due to topography, the most suitable spillway is
(A) Straight drop spillway
(B) Shaft spillway
(C) Chute spillway
(D) Ogee spillway
Answer: Option B
Question No. 40
h flood estimate, is useful only
for the catchments in
(A) Southern India
(B) Northern India
(C) Eastern India
(D) Western India
Answer: Option B
Question No. 41
Silt excluders are constructed on
the
(A) River bed upstream of head
regulator
(B) River bed downstream of head
regulator
(C) Canal bed upstream of head
regulator
(D) Canal bed downstream of head
regulator
Answer: Option A
Question No. 42
Pick up the correct statement from
the following:
(A) Rivers, lakes, oceans and
springs get water from the rains
(B) Rain water is obtained by
evaporation from rivers, lakes and oceans
(C) Water remains in atmosphere as
vapours
(D) All the above
Answer: Option D
Hydrology and Water Resources Engineering MCQS, water resources multiple choice question and answer, hydrogeology MCQ,
Question No. 43
For a proportional outlet, the
flexibility is
(A) Zero
(B) Between zero and 1
(C) 1
(D) Greater than 1
Answer: Option C
Question No. 44
Pick up the correct statement from
the following:
(A) The portion of pellicular water
which remains unutilised, is called hygroscopic water
(B) The moisture content at which
permanent wilting of plants takes place, is called the wilting
point
(C) The moisture deficiency will be
different at different points
(D) All the above
Answer: Option D
Question No. 45
The aqueduct or super-passage type
of works are generally used when
(A) High flood drainage discharge
is small
(B) High flood drainage discharge
is large and short lived
(C) High flood drainage discharge
is large and continues for a long time
(D) None of the above
Answer: Option A
Question No. 46
If a gauge is installed perpendicular
to the slope, its measurement is reduced by multiplying
(A) Sine of the angle of
inclination with vertical
(B) Cosine of the angle of
inclination with vertical
(C) Tangent of the angle of
inclination with vertical
(D) Calibration coefficient of the
gauge
Answer: Option B
Question No. 47
A river training work is generally
required when the river is
(A) Aggrading type
(B) Degrading type
(C) Meandering type
(D) Both (A) and (B)
Answer: Option C
Question No. 48
From the Survey of India map, the
distance of the critical point is 20 km and difference in elevation
is 193 m. The over land flow time,
is
(A) 2 hours
(B) 3 hours
(C) 2 hours and 30 minutes
(D) 4 hours
Answer: Option D
Question No. 49
The maximum average depth due to
one day storm over an area of 100 km² is 100 mm. Depth-
Area-Duration (DAD) curves indicate
the same area of 100 km² the maximum average depth for a
3 hour storm will be
(A) 100 mm
(B) More than 100 mm
(C) Less than 100 mm
(D) None of the above
Answer: Option B
Question No. 50
Pick up the correct statement from
the following:
(A) The perched aquifer is found in
unconfined aquifer
(B) The top surface of the water
held in the perched aquifer, is known as perched water table
(C) The perched aquifer is formed in
unfined acquirer if an impervious layer exists
(D) All the above
Answer: Option D
Hydrology and Water Resources Engineering MCQS, water resources multiple choice question and answer, hydrogeology MCQ,
Question No. 51
The stream which does not have any
base flow contribution is called
(A) Perennial stream
(B) Intermittent stream
(C) Ephemeral stream
(D) None of the above
Answer: Option C
Question No. 52
Non-recording rain gauges
(A) Collect the rain whose volume
is measured by means of graduated cylinders
(B) Collect the rain which is
directly measured by means of graduated cylinders in centimetres
of water depth
(C) Are generally used in hilly
terrain
(D) Are cylindrical in shape
Answer: Option B
Question No. 53
method requires the following data
pertaining annual flood series
(i) Mean value
(ii) Standard deviation
(iii) Length of record
(iv) Coefficient of skew
The correct answer is
(A) (i) and (ii)
(B) (i),(i) and (iii)
(C) (i), (ii) and (iv)
(D) (i), (ii), (iii) and (iv)
Answer: Option B
Question No. 54
From the pattern of the rainfall
shown in the below figure, the total precipitation is
(A) 4 cm
(B) 4.5 cm
(C) 5 cm
(D) 5.5 cm
Answer: Option D
Question No. 55
The uplift pressure on a dam can be
controlled by
(i) Constructing cut-off under
upstream face
(ii) Constructing drainage channels
between the dam and its foundation
(iii) By pressure grouting in
foundation
The correct answer is
(A) Only (i)
(B) Both (i) and (ii)
(C) Both (i) and (iii)
(D) (i), (ii) and (iii)
Answer: Option D
Question No. 56
Pick up the correct statement from
the following:
(A) The zone below water table, is
called zone of saturation
(B) The zone above water table, is
called zone of aeration
(C) The water which exists in the
zone of saturation, is called ground water
(D) All the above
Answer: Option D
Question No. 57
The most suitable material for the
central impervious core of a zoned embankment type dam is
(A) Clay
(B) Coarse sand
(C) Silty clay
(D) Clay mixed with fine sand
Answer: Option D
Question No. 58
Phytometer method is generally used
for the measurement of
(A) Interception
(B) Evaporation
(C) Transpiration
(D) None of these
Answer: Option C
Question No. 59
If there are two canals taking off
from each flank of a river, then there will be
(A) One divides wall and one
under-sluice
(B) One divides wall and two
under-sluices
(C) Two divide walls and one
under-sluice
(D) Two divide walls and two
under-sluices
Answer: Option D
Question No. 60
Knowledge of hydrology is necessary
for civil engineers for
(A) Designing and construction of
irrigation structures
(B) Designing and construction of
bridges and culverts
(C) Flood control works
(D) All the above
Answer: Option D
Question No. 61
(A) 19 m
(B) 38 m
(C) 57 m
(D) 76 m
Answer: Option B
Question No. 62
The equation P - Q = Te index
for
determining the infiltration capacity, was suggested by
(A) Horton
(B) Horner
(C) Lloyd
(D) Bernard
Answer: Option A
Question No. 63
Which of the following canal
outlets maintains a constant discharge?
(A) Non-modular outlet
(B) Flexible outlet
(C) Rigid module
(D) None of the above
Answer: Option C
Question No. 64
Pick up correct statement from the
following:
(A) The air from outer portion of
cyclones gets lifted for causing precipitation
(B) The air from central portion of
cyclone's gets lifted for causing precipitation
(C) The air from entire surface of
the cyclones gets lifted for causing precipitation
(D) None of those
Answer: Option B
Question No. 65
Tortuosity of a meandering river is
always
(A) Equal to 1
(B) Less than 1
(C) Greater than 1
(D) Less than or equal to 1
Answer: Option C
Question No. 66
Sharp crested weirs are generally
used
(A) For large flows
(B) For small flows
(C) For streams carrying high
sediment loads
(D) For rivers carrying floating
debris
Answer: Option A
Question No. 67
A runoff river plant is
(A) A low head scheme
(B) A medium head scheme
(C) A high head scheme
(D) None of the above
Answer: Option A
Question No. 68
If the axial length of a drainage
basin is 35 km and its form factor is 0.2, the total area of the basin
is
(A) 205 sq. km.
(B) 215 sq. km.
(C) 225 sq. km.
(D) 245 sq. km.
Answer: Option D
Question No. 69
Interception losses are due to
(i) Evaporation
(ii) Transpiration
(iii) Stream flow
The correct answer is
(A) Only (i)
(B) (i) and (ii)
(C) (ii) and (iii)
(D) (i), (ii) and (iii)
Answer: Option A
Question No. 70
Pick up the correct statement from
the following:
(A) The ratio of total volume of
voids in soil aggregates to the total volume of aggregate, is
called Porosity
(B) Water retained by the
interstices due to molecular attraction, is called pellicular water
(C) Sum of the percentage of
specific yield and specific retention is 100
(D) All the above
Answer: Option D
Question No. 71
Instantaneous unit hydrograph is a
hydrograph of
(i) Unit duration
(ii) Unit rainfall excess
(iii) Infinitely small duration
(iv) Infinitely small rainfall
excess
The correct answer is
(A) (i) and (ii)
(B) (i) and (iv)
(C) (ii) and (iii)
(D) (iii) and (iv)
Answer: Option C
Question No. 72
If the loss due to friction in
pipes is 4 m, the total losses in strainer and bends may be taken as
(A) 0.10 m
(B) 0.20 m
(C) 0.5 m
(D) 1.0 m
Answer: Option D
Question No. 73
From the data of the rain storm
shown in the below figure, the value of Windex is
(A) 1.5 cm/hour
(B) 2 cm/hour
(C) 2.5 cm/hour
(D) 3 cm/hour
Answer: Option C
Question No. 74
Horizontal acceleration due to
earthquake results in
(A) Hydrodynamic pressure
(B) Inertia force into the body of
the dam
(C) Both (A) and (B)
(D) None of the above
Answer: Option C
Hydrology and Water Resources Engineering MCQS, water resources multiple choice question and answer, hydrogeology MCQ,
Question No. 75
Water contains
(A) One hydrogen atom and one
oxygen atom
(B) Two hydrogen atoms and one
oxygen atom
(C) One hydrogen atom and two
oxygen atoms
(D) Three hydrogen atoms and two
oxygen atoms
Answer: Option B
Question No. 76
For wave action in dams, the
maximum height of freeboard is generally taken to be equal to
(A) 0.5 hw
(B) 0.75 hw
(C) 1.25 hw
(D) 1.50 hw
Answer: Option D
Question No. 77
Infiltration capacity of soil
depends upon
(A) Number of voids present in the
soil
(B) Shape and size of soil
particles
(C) Arrangement of soil particles
(D) All the above
Answer: Option D
Question No. 78
Which of the following spillways is
least suitable for an earthen dam?
(A) Ogee spillway
(B) Chute spillway
(C) Side channel spillway
(D) Shaft spillway
Answer: Option A
Question No. 79
Pick up the correct statement from
the following:
(A) Absolute humidity at a given
temperature is equal to weight of moisture present in a unit
volume
(B) Relative humidity is the ratio
of actual vapour pressure and saturation vapour pressure at
the same temperature
(C) Relative humidity is the ratio
of the weight of the vapours present per unit volume to the
weight of vapours which could be
contained at the same temperature when fully saturated
(D) All the above
Answer: Option D
Question No. 80
the exit gradient in the absence of
a downstream cut-off is
(A) 0
(B) Unity
(C) Infinity
(D) Very large
Answer: Option C
Question No. 81
In India the recording type rain
gauge generally used, is
(A) Weighing type
(B) Tipping type
(C) Float recording type
(D) None of these
Answer: Option C
Question No. 82
Which of the following can be used
as a meter fall?
(A) Vertical drop fall
(B) Flumed glacis fall
(C) Unflumed glacis fall
(D) All of the above
Answer: Option A
Question No. 83
The critical depth in a channel can
be produced
(A) By raising the bottom of the
channel
(B) By lowering the bottom of the
channel
(C) By decreasing the width of the
channel
(D) Both (a) and (c) of above
Answer: Option D
Question No. 84
The main cause of meandering is
(A) Presence of an excessive bed
slope in the river
(B) Degradation
(C) The extra turbulence generated
by the excess of river sediment during floods
(D) None of the above
Answer: Option C
Question No. 85
The run off a drainage basin is
(A) Initial recharge + ground water
accretion + precipitation
(B) Precipitation + ground water
accretion + initial recharge
(C) Precipitation - ground water
accretion + initial recharge
(D) Precipitation - ground water
accretion - initial recharge
Answer: Option D
Question No. 86
The net speed under which the
turbine reaches its peak efficiency is called
(A) Design speed
(B) Rated speed
(C) Gross speed
(D) Operating speed
Answer: Option A
Question No. 87
The quantity of water retained by
the sub-soil against gravity, is known
(A) Yield
(B) Porosity
(C) Specific yield
(D) Specific retention
Answer: Option D
Question No. 88
To determine the discharge at a
section in a stream from its rating curve, the required data are
(i) Slope of water surface at the
section
(ii) Stage at the section
(ii) Current meter readings at the
section
The correct answer is
(A) (i) and (ii)
(B) (ii) and (iii)
(C) Only (ii)
(D) Only (iii)
Answer: Option C
Question No. 89
In the derivation of Thiem's
formula, Q
= (S1
- S2)/[2.3 log10( / )] the
following assumption is
not applicable
(A) The aquifer is homogeneous and
isotropic
(B) Flow lines are radial and
horizontal
(C) The slope of the water surface
is too small
(D) The well has been sunk up to
the surface of the unconfined aquifer
Answer: Option D
Question No. 90
The peak of a 4 hour flood
hydrograph is 240 m3/sec. If the rainfall excess is 80 mm and base
flow
which is constant is 40 m3/sec, peak of
4hours unit hydrograph will be
(A) 20 m3/sec
(B) 25 m3/sec
(C) 30 m3/sec
(D) 35 m3/sec
Answer: Option B
Question No. 91
For the estimate of high floods in
fan-shaped catchment, the formula used is
(A) Dicken's formula
(B) Ryve's formula
(C) Inglis formula
(D) None of these
Answer: Option C
Question No. 92
The major resisting force in a
gravity dam is
(A) Water pressure
(B) Wave pressure
(C) Self-weight of dam
(D) Uplift pressure
Answer: Option C
Question No. 93
Hydrograph is a graphical
representation of
(A) Surface run off
(B) Ground water flow
(C) Rain fall
(D) Discharge flowing in the river
Answer: Option D
Question No. 94
Seepage through embankments in an
earthen dam is controlled by
(A) Drainage filters
(B) Relief wells
(C) Drain trenches
(D) Provision of downstream berms
Answer: Option C
Question No. 95
Indian Meteorological department
uses the standard gauges whose collectors have apertures of
(A) 50 or 100 sq. cm area
(B) 100 or 150 sq. cm area
(C) 100 or 200 sq. cm area
(D) 250 or 500 sq. cm area
Answer: Option C
Question No. 96
The main function of a divide wall
is to
(A) Control the silt entry in the
canal
(B) Prevent river floods from
entering the canal
(C) Separate the under-sluices from
weir proper
(D) Provide smooth flow at
sufficiently low velocity
Answer: Option C
Question No. 97
The rainfall at any place is
described by
(A) Its intensity
(B) Its duration
(C) Its frequency
(D) All the above
Answer: Option D
Question No. 98
The sensitivity of a rigid module
is
(A) Zero
(B) Between zero and one
(C) 1
(D) Infinity
Answer: Option A
Question No. 99
Discharge curve may be extended by
logarithmic method if
(A) Cross section of river is
uniform
(B) River is broader and shallower
(C) River is of any type
(D) None of these
Answer: Option A
Question No. 100
An aggrading river is a
(A) Silting river
(B) Scouring river
(C) Both silting and scouring river
(D) Neither silting nor scouring
river
Answer: Option A
Question No. 101
Izzard formula for the time of
concentration in minutes for the plots having no channels, is
(where Lo
is
the length of overland flow in metres and Kp rainfall intensity in cm/hour)
(A) T = 111 b. L01/3/(Kp)2/3
(B) T = 222 b. L01/2/(Kp)1/3
(C) T = 333 b. L0/Kp
(D) T = 111 b. L01/3/(Kp)2/5
Answer: Option A
Hydrology and Water Resources Engineering MCQS, water resources multiple choice question and answer, hydrogeology MCQ,
Question No. 102
Lining of irrigation channels
(A) Increases the water-logging
area
(B) Decreases the water-logging
area
(C) Does not change the water
logging area
(D) None of the above
Answer: Option B
Question No. 103
The equation V = (1000 ID10²/60) × (1.8T + 42) which is
used for determining the velocity of ground
water flow in metres per day is
known as
(A) Meinzer's formula
(B) Slichter's formula
(C) Darcy's formula
(D) Hazen formula
Answer: Option D
Question No. 104
The stage of river carrying a
discharge of Q m/sec at a point is 10 m and slope of water surface is
(1/4000). The discharge of a flood
same point and same stage of 10 m with a water surface slope
of (1/1000) will be
(A) 3/sec
(B) 0.5 Q m3/sec
(C) 2 Q m3/sec
(D) 4 Q m3/sec
Answer: Option C
Question No. 105
In the estimate of design flood,
Dickens assumes that high flood in cumecs, is proportional to
catchment area raised to the power
(A) 1/4
(B) 1/2
(C) 3/4
(D) 2/3
Answer: Option C
Question No. 106
When the reservoir is full, the
maximum compressive force in a gravity dam is produced
(A) At the toe
(B) At the heel
(C) Within the middle third of base
(D) At centre of base
Answer: Option A
Question No. 107
Pick up the correct statement from
the following:
(A) Yield of a drainage basin is
the run off at any time
(B) Yield of a drainage basin is
the run off over long periods
(C) Yield of a drainage basin is
expressed as surface run off per year
(D) Run off is expressed as total
volume per day
Answer: Option B
Question No. 108
For the upstream face of an earthen
dam, the most adverse condition for stability of slope is
(A) Sudden drawdown
(B) Steady seepage
(C) During construction
(D) Sloughing of slope
Answer: Option A
Question No. 109
Pick up the correct statement from
the following:
(A) If ground water enters the
channel, the channel is known as effluent channel
(B) If water goes out of channel to
meet ground water, the channel is said to be influent stream
(C) If the water table is at higher
level than the water level in channel, ground water flows to
the stream
(D) All the above
Answer: Option D
Question No. 110
Vertical drop fall is satisfactory
for a height upto
(A) 0.5 m
(B) 1.5 m
(C) 3.5 m
(D) 5.0 m
Answer: Option B
Question No. 111
Precipitation caused due to
striking of air masses with a topographical feature, is called
(A) Orographic precipitation
(B) Convective precipitation
(C) Cyclonic precipitation
(D) None of these
Answer: Option A
Question No. 112
If D is the depth of scour below
original bed, then the width of launching apron is generally taken
as
(A) 1.2 D
(B) 1.5 D
(C) 2.0 D
(D) 2.5 D
Answer: Option B
Question No. 113
For efficient working of a control
meter, its throat length is approximately kept
(A) Equal to the critical depth
(B) Twice the critical depth
(C) Three times the critical depth
(D) Four times the critical depth
Answer: Option C
Question No. 114
The net head under which the
turbine reaches its peak efficiency at synchronous speed is called
(A) Design head
(B) Rated head
(C) Gross head
(D) Operating head
Answer: Option A
Question No. 115
Pick up the correct statement from
the following:
(A) The unit hydrograph of a
specified unit duration obtained from the past data can be used to
obtain the hydrograph of future
storms of like duration
(B) To obtain the ordinates of
storm hydrograph, the ordinates of unit hydrograph are
multiplied by the multiplying
factor
(C) The multiplying factor for
storm hydrograph may be obtained by dividing the run off in mm
by 25 mm
(D) All the above
Answer: Option D
Question No. 116
A unit hydro graph has one unit of
(A) Rainfall duration
(B) Rainfall excess
(C) Time base of direct runoff
(D) Discharge
Answer: Option B
Question No. 117
When a constant discharge 2.91
litres/sec. was obtained in a pumping test, the draw downs in the
test wells at 3 m and 6.184 m were
2.6 m and 0.3 m respectively. If over-all depth of the pumping
well was 16 m, the permeability of
the soil, is
(A) 0.0005 cm/sec
(B) 0.001 cm/sec
(C) 0.002 cm/sec
(D) 0.01 cm/sec
Answer: Option B
Hydrology and Water Resources Engineering MCQS, water resources multiple choice question and answer, hydrogeology MCQ,
Question No. 118
The maximum permissible
eccentricity for no tension at the base of a gravity dam is
(A) B/2
(B) B/3
(C) B/4
(D) B/6
Answer: Option D
Question No. 119
Levees and flood walls,
(A) Are designed to carry
unbalanced water load
(B) Are designed with adequate
dimensions
(C) Are means of controlling floods
(D) Are never provided free-boards
Answer: Option D
Question No. 120
The ratio of average values of
shear stresses produced on the bed and the banks of a channel due
to flowing water is
(A) Less than 1
(B) Equal to 1
(C) Greater than 1
(D) Equal to zero
Answer: Option C
Question No. 121
Unit Hydrograph theory was
enunciated by
(A) Merril Bernard
(B) W.W. Horner
(C) Le-Roy K. Shermen
(D) Robert E. Horten
Answer: Option C
Question No. 122
The ratio of rate of change of the
discharge of an outlet to the rate of change of the discharge of
distributing channel is called
(A) Proportionality
(B) Flexibility
(C) Setting
(D) Sensitivity
Answer: Option B
Question No. 123
Pick up the correct equation from
the following:
(A) Run off = Surface run off +
Ground water flow
(B) Run off = Surface run off -
Ground water flow
(C) Run off = Surface run off /
Ground water flow
(D) Run off = Surface run off x
Ground water flow
Answer: Option A
Question No. 124
A repelling groyne is aligned
(A) Pointing upstream
(B) Pointing downstream
(C) Perpendicular to bank
(D) Parallel to bank
Answer: Option A
Question No. 125
Precipitation caused by lifting of
an air mass due to the pressure difference, is called
(A) Cyclonic precipitation
(B) Convective precipitation
(C) Orographic precipitation
(D) None of these
Answer: Option A
Question No. 126
A 6 hours storm had 4 cm of
rainfall and the resulting runoff was 2 cm. If <j) index remains at the
same value, the runoff due to 10 cm
rainfall in 12 hours in the catchment is
(A) 4.5 cm
(B) 6.0 cm
(C) 7.5 cm
(D) 9.0 cm
Answer: Option B
Question No. 127
The deficiency in rain catch due to
vertical acceleration of air forced upward over the gauge, is
(A) Greater for heavy rain
(B) Greater for lighter rain
(C) Greater for large drops
(D) Lesser for small rain drops
Answer: Option B
Question No. 128
Presence of tail water in a gravity
dam
(i) Increases the principal stress
(ii) Decreases the principal stress
(iii) Increases the shear stress
(iv) Decreases the shear stress
The correct answer is
(A) (i) and (iii)
(B) (i) and (iv)
(C) (ii) and (iii)
(D) (ii) and (iv)
Answer: Option D
Question No. 129
If y is the depth of water at any
section, then the mean velocity is
(A) 0.1 y
(B) 0.2 y
(C) 0.3 y
(D) 0.6 y
Answer: Option D
Question No. 130
As compared to crest of the normal
portion of the weir, the crest of the under sluice portion of
weir is kept at
(A) Lower level
(B) Higher level
(C) Same level
(D) Any of the above depending on
the design
Answer: Option A
Question No. 131
If S is the potential infiltration, P is rainfall in
cm in a drainage of a soil with fair pasture cover, the
direct run off Q in cm is given
by
(A) Q = (P - 0.1 S)²/(P + 0.4 S)
(B) Q = (P - 0.2 S)²/(P + 0.6 S)
(C) Q = (P - 0.2 S)²/(P + 0.8 S)
(D) Q = (P - 0.2 S)²/(P + 0.2 S)
Answer: Option C
Question No. 132
In a Sarda type fall, rectangular
crest is used for discharge upto
(A) 6 cumecs
(B) 10 cumecs
(C) 14 cumecs
(D) 20 cumecs
Answer: Option C
Question No. 133
A well penetrates to 30 m below the
static water table. After 24 hours of pumping at 31.40
litres/minute, the water level in a
test well at a distance of 80 m is lowered by 0.5 m and in a well
20 m away water is lowered by 1.0
m. The transmissibility of the aquifer, is
(A) 1.185 m2/minute
(B) 1.285 m2/minute
(C) 1.385 m2/minute
(D) 1.485 m2/minute
Answer: Option C
Question No. 134
A hydroelectric scheme operating
under a head of 80 m will be classified as
(A) Low head scheme
(B) Medium head scheme
(C) High head scheme
(D) None of the above
Answer: Option C
Question No. 135
In nature water may occur as
(A) Liquid
(B) Solid
(C) Vapours
(D) All the above
Answer: Option D
Question No. 136
Seepage through foundation in an
earthen dam is controlled by providing
(A) Rock toe
(B) Horizontal blanket
(C) Impervious cut off
(D) Chimney drain
Answer: Option C
Question No. 137
Pick up the correct statement from
the following:
(A) Central portion of a cyclone
acts as a chimney through which air gets lifted
(B) Cyclonic precipitation caused
by a warm front is generally continuous
(C) Greatest amount of orographic
precipitation falls in the windward side of the barrier
(D) All the above
Answer: Option D
Hydrology and Water Resources Engineering MCQS, water resources multiple choice question and answer, hydrogeology MCQ,
Question No. 138
Pick up the incorrect statement
from the following:
(A) At two meteorologically
homogeneous stations, the average annual precipitation is same
(B) If the average annual
precipitation at two places is same these are meteorologically
homogeneous stations
(C) Neither (a) nor (b)
(D) Both (a) and (b)
Answer: Option B
Question No. 139
A unit hydrograph is a hydrograph
of a rain storm of a specified duration resulting from a run-off
of
(A) 15 mm
(B) 20 mm
(C) 25 mm
(D) 30 mm
Answer: Option B
Question No. 140
Evaporation losses depend upon
(A) Area of the water surface and
depth of the water
(B) Nature of precipitation and
type of vegetation
(C) Humidity and wind velocity
(D) All the above
Answer: Option D
Question No. 141
Pick up the correct statement from
the following:
(A) Run off and surface run off are
the same
(B) Run off includes the water
flowing over the surface
(C) Run off is sometimes called
discharge of the river
(D) Surface run off is sometimes
called stream flow
Answer: Option C
Question No. 142
Which of the following canal
structures is used to remove surplus water from an irrigation channel
into a natural drain?
(A) Canal fall
(B) Canal outlet
(C) Canal escape
(D) Canal regulator
Answer: Option C
Question No. 143
Pressure exerted by fully saturated
air, is known
(A) Partial pressure
(B) Saturation pressure
(C) Saturation vapour pressure
(D) Both (c) and (d) of the above
Answer: Option D
Question No. 144
Study the following statements.
(i) Levees are constructed parallel
to river flow
(ii) Spurs are constructed parallel
to river flow
(iii) Levees are constructed
transverse to river flow
(iv) Spurs are constructed
transverse to river flow
The correct answer is
(A) (i) and (ii)
(B) (i) and (iv)
(C) (ii) and (iii)
(D) (iii) and (iv)
Answer: Option B
Question No. 145
Precipitation caused due to upward
movement of warmer air as compared to surrounding air, is
called
(A) Cyclonic precipitation
(B) Convective precipitation
(C) Orographic precipitation
(D) None of these
Answer: Option B
Question No. 146
The run off is affected by
(A) Size of the basin
(B) Shape of the basin
(C) Elevation of the water shed
(D) All the above
Answer: Option D
Question No. 147
The coefficients of permeability of
soils of an unconfined aquifer and another confined aquifer
were determined by pumping water
from the wells and observing the effect of water table in two
test wells at equal distances was
found to be equal. The total height of confined aquifer H is given
by
(A) H = h2 - h1
(B) H = h1 - h2
(C) H = h2 + h1
(D) ½ (h1
+ h2)
Answer: Option D
Question No. 148
If the demand line drawn from a
ridge in a flow mass curve does not intersect the curve again, it
indicates that
(A) Demand cannot be met by inflow
(B) Reservoir was not full at the
beginning
(C) Both (A) and (B)
(D) None of the above
Answer: Option A
Hydrology and Water Resources Engineering MCQS, water resources multiple choice question and answer, hydrogeology MCQ,
Question No. 149
Ryve's formula for flood estimate
in cumecs, is
(A) Q = CA3/4
(B) Q = CA2/3
(C) Q = CA1/2
(D) Q = CA1/4
Answer: Option B
Question No. 150
Coefficient of discharge of an ogee
spillway
(A) Depends on depth of approach
and upstream slope
(B) Depends on downstream apron
interference and downstream submergence
(C) Remains constant
(D) Both (A) and (B)
Answer: Option D
Question No. 151
The theory of infiltration capacity
was given by
(A) Merrill Bernard
(B) W.W. Horner
(C) Le-Roy K. Shermen
(D) Robert E. Horten
Answer: Option D
Question No. 152
respectively, then cross drainage
work will be
(A) aqueduct
(B) Super-passage
(C) Syphon
(D) Syphon aqueduct
Answer: Option C
Question No. 153
Absolute humidity in air
(A) Decreases at higher altitudes
(B) Increases at higher altitudes
(C) Remains constant at all
altitudes
(D) None of these
Answer: Option A
Question No. 154
A hydraulic jump in a control meter
will be formed above the control, if its original
(A) Depth is more than critical
depth
(B) Depth is less than the critical
depth
(C) Depth is equal to critical
depth
(D) None of these
Answer: Option B
Question No. 155
Pick up the incorrect statement
from the following:
(A) The rate of flow of water
through a unit cross-sectional area under a unit hydraulic gradient,
is called coefficient of
permeability
(B) The rate of flow of water
through a vertical strip of the aquifer of unit width and full depth
under a unit hydraulic gradient, is
called coefficient of transmissibility
(C) The flow of water through
aquifers, is governed by the Darcy's law
(D) The term 'transmissibility' was
introduced by Meinzer
Answer: Option D
Question No. 156
Variability of rainfall is
(i) Largest in regions of high
rainfall
(ii) Largest in coastal areas
(iii) Largest in regions of scanty
rainfall
The correct answer is
(A) Only (i)
(B) (i) and (ii)
(C) Only (iii)
(D) (ii) and (iii)
Answer: Option C
Question No. 157
For calculating the evaporation
rate over a reservoir surface
E = 0.771 (1.465 - 0.00732B) (0.44 -
0.007375 V) (pe
- pa), the equation
is given by
(A) Roohwer's, formula in M.K.S.
(B) Roohwer's formula in F.P.S.
(C) Dalton's formula in F.P.S.
(D) Dalton's formula in M.K.S.
Answer: Option A
Question No. 158
In a chute spillway, the flow is
usually
(A) Uniform
(B) Subcritical
(C) Critical
(D) Super critical
Answer: Option D
Question No. 159
The polythene bottles are used for
collecting rain water and. their capacities is
(A) 2 litres
(B) 4 litres
(C) 10 litres
(D) All the above
Answer: Option D
Question No. 160
Tortuosity of a meandering river is
the ratio of
(A) Meander belt to meander length
(B) Meander length to meander belt
(C) Curved length along the channel
to the direct axial length of the river reach
(D) Direct axial length of the
river reach to curved length along the channel
Answer: Option C
Question No. 161
The best instrument for measuring
the velocity of a stream flow is
(A) Pitot tube
(B) Price's current meter
(C) Surface float
(D) Sub-surface float
Answer: Option B
Question No. 162
Time of overland flow, is affected
by
(A) Slope of the basin
(B) Type of the ground surface
(C) Length of the flow path
(D) All the above
Answer: Option D
Question No. 163
For high flood estimates the
average value of the constant C in Dicken's formula Q =CA3/4, is
(A) 6.5
(B) 8.5
(C) 9.5
(D) 11.5
Answer: Option D
Question No. 164
Pick up the correct statement from
the following:
(A) The amount of water retained on
the surface of soil grains by molecular attraction, is known
as pellicular water
(B) The degree of resistance to
movement of the pellicular water generally expressed by the
surface tension
(C) The pellicular water held in
any soil, is called field capacity
(D) All the above
Answer: Option D
Question No. 165
A runoff river plant
(A) Is a medium head scheme
(B) Generates power during peak
hours only
(C) Is suitable only on a perennial
river
(D) Has no pondage at all
Answer: Option C
Question No. 166
Pick up the correct statement from
the following:
(A) Higher the gauge, more
deficient will be the rain catch
(B) Heavier the rain, lesser will
be the rain catch
(C) The trees serving as wind
brakes in the vicinity of the gauge, should not subtend angles
greater than 45°
(D) All the above
Answer: Option D
Question No. 167
Runoff is measured in
(A) Cubic metres
(B) Cubic metres per sec.
(C) Cubic metres per minute
(D) Cubic metres per hour
Answer: Option B
Question No. 168
T S
R
(A) 4 RS
(B) 11 RS
(C) 7 RS
(D) 15 RS
Answer: Option B
Hydrology and Water Resources Engineering MCQS, water resources multiple choice question and answer, hydrogeology MCQ,
Question No. 169
If h is the loss due to friction in a
pipe. Total losses in strainer and bends may be taken as
(A) 0.01 h
(B) 0.45 h
(C) 0.20 h
(D) 0.25 h
Answer: Option D
Question No. 170
Hydrology helps in
(A) Predicting maximum flows
(B) Deciding the minimum reservoir
capacity
(C) Forecasting the availability of
quantity of water at reservoir site
(D) All the above
Answer: Option D
Question No. 171
Which of the following types of
falls use parabolic glacis for energy dissipation?
(A) Vertical drop fall
(B) Glacis fall
(C) Montague type fall
(D) Inglis fall
Answer: Option C
Question No. 172
In India, rain fall is generally
recorded at
(A) 8 A.M.
(B) 12 Noon
(C) 4 P.M.
(D) 8 P.M.
Answer: Option A
Question No. 173
The initial basin recharge is equal
to
(A) Interception
(B) Depression storage
(C) Rain absorbed by the moisture
deficiency
(D) All the above
Answer: Option D
Question No. 174
Shrouding is provided in
(A) Cavity type tube wells
(B) Slotted type tube wells
(C) Strainer type tube wells
(D) Perforated type tube wells
Answer: Option B
Question No. 175
Rain simulators are used for the
determination of
(A) Evaporation
(B) Precipitation
(C) Run off
(D) Infiltration capacity
Answer: Option D
Question No. 176
Pick up the correct statement from
the following:
(A) The throat of the section of a
control meter is either rectangular or trapezoidal
(B) The floor of the control meter
throat is almost level
(C) The floor of the expanding
outlet of the control meter is given a steep slope
(D) All the above
Answer: Option D
Question No. 177
The Dupuit formula is based on
(A) One observation well
(B) Two observation wells
(C) Three observation wells
(D) No observation well
Answer: Option D
Question No. 178
A river bend characterized by
silting
(A) Scouring on concave side
(B) Silting on convex side
(C) Scouring on convex side and on
concave side
(D) Scouring on concave side and
silting on convex side
Answer: Option D
Question No. 179
Run off includes
(A) Precipitation over catchment
area of the stream and its attributaries
(B) Surface run off
(C) Ground water flow
(D) All the above
Answer: Option D
Question No. 180
The respective storm totals at
three surrounding stations A, B and C are 110, 90 and 70 mm. If the
normal annual precipitation amounts
at stations X, A, B and C are respectively 1000, 1100, 1200
and 1250 mm, the estimated storm
precipitation at X is
(A) 75 mm
(B) 77 mm
(C) 79 mm
(D) 81 mm
Answer: Option B
Question No. 181
Bernard's distribution graph is a
plot of time on X-axis and
(A) Run off on the y-axis
(B) Total run off on the y-axis
(C) Percentage of total surface run
off on y-axis
(D) Percentage of total surface run
off during uniform time intervals on y-axis
Answer: Option D
Question No. 182
The rate of evaporation from
reservoirs may be determined by
(A) Pan-measurement method
(B) Empirical formulae
(C) Storage equation method
(D) All the above
Answer: Option D
Question No. 183
Pick up the correct statement from
the following:
(A) Rain which is intercepted by
buildings, vegetations and other objects, is generally known as
rainfall interception
(B) The difference between the
total rainfall and intercepted rainfall, is generally called ground
rainfall
(C) When rainfall exceeds the
interception rainfall, water reaches the ground and infiltration
starts
(D) All the above
Answer: Option D
Question No. 184
The standard height of a standard
rain gauge, is
(A) 10 cm
(B) 20 cm
(C) 30 cm
(D) 50 cm
Answer: Option C
Question No. 185
The runoff is affected by
(A) Type of precipitation
(B) Rain intensity and duration of
rainfall
(C) Rain distribution and soil
moisture deficiency
(D) All the above
Answer: Option D
Question No. 186
With the usual meanings of letters,
the equation V = 400 I (D10²/4) is used for determining the
velocity of ground water flow in
metres per day. It is known as
(A) Meinzer's formula
(B) Slichter's formula
(C) Darcy's formula
(D) Hazen's formula
Answer: Option B
Question No. 187
Hydrology is the science which
deals with
(A) Rain water
(B) River water
(C) Sea water
(D) Surface and underground water
Answer: Option D
Question No. 188
Symon's rain gauge is
(A) Tipping-bucket gauge
(B) Weighing type gauge
(C) Float recording gauge
(D) Non-recording gauge
Answer: Option D
Question No. 189
If P and A are the perimeter and area of a
drainage basin, its compactness coefficient, is
(A) P²/2
(B) P/2
(C) P
(D) P3/ 3A
Answer: Option C
Question No. 190
Pettis formula Q = C (P.B)5/4
cumecs,
is based upon
(A) Rainfall and drainage area
(B) Run off and drainage area
(C) Drainage area and its shape
(D) Drainage area
Answer: Option A
Question No. 191
A volume of air at constant
barometric pressure may be brought to dew point by
(A) Increasing the temperature
(B) Decreasing the temperature
(C) Neither (a) nor (b)
(D) Both (a) and (b)
Answer: Option B
Question No. 192
The form factor of a drainage basin
is obtained by dividing
(A) Area of the basin by the axial
length
(B) Average width of the basin by
the axial basin
(C) Area of the basin by the square
of the axial length
(D) Both (b) and (c)
Answer: Option D
Question No. 193
If is unit weight of water, Q the discharge in
cumecs, H
the pump, the H.P. of the motor is
(A) H.P. = /75
(B) H.P. = /4500
(C) H.P. = /75 H
(D) H.P. = /4500 H
Answer: Option A
Question No. 194
The surface Run-off is the quantity
of water
(A) Absorbed by soil
(B) Intercepted by buildings and
vegetative cover
(C) Required to fill surface
depressions
(D) That reaches the stream
channels
Answer: Option D
Question No. 195
A recording type rain gauge
(A) Produces a mass curve of rain
fall
(B) Records the cumulative rain
(C) Is sometimes called integrating
rain gauge or continuous rain gauge
(D) All the above
Answer: Option D
Question No. 196
For computing the run off volumes
of large areas, numbers of infiltrations used are
(A) 2
(B) 3
(C) 4
(D) 5
Answer: Option A
Question No. 197
The efficiency of a pump may be
taken as
(A) 0.55
(B) 0.60
(C) 0.65
(D) 0.70
Answer: Option C
Question No. 198
The infiltration capacity during
rain storm, is considerably reduced due to
(A) Surface detention
(B) Soil moisture
(C) Compaction due to rain
(D) All the above
Answer: Option D
Question No. 199
The average mean velocity of a
stream having depth h, may be obtained by taking the average of
the readings of a current meter at
a depth of
(A) 0.1 h and 0.9 h
(B) 0.2 h and 0.8 h
(C) 0.3 h and 0.7 h
(D) 0.4 h and 0.6 h
Answer: Option B
Question No. 200
A well is sunk in an unconfined
aquifer having a saturated depth of 100 m. Assuming the
equilibrium flow conditions and a
homogeneous aquifer and radius of influence to be same, the
ratio of discharges at 20 m and 40
m draw downs, is
(A) 2/3
(B) 5/4
(C) 4/5
(D) 8/7
Answer: Option D
Question No. 201
A soil strata may consist of
(A) Soil zone
(B) Intermediate zone
(C) Capillary zone
(D) All the above
Answer: Option D
Question No. 202
A river is said to be of uniform
section if in its section
(A) A segment of a circle can be
fitted
(B) A parabolic section can be
fitted
(C) A rectangular section can be
fitted
(D) All the above
Answer: Option D
Question No. 203
Isopiestic lines are the contours
(A) Drawn to represent water table
(B) Drawn to represent piezometric
heads
(C) Drawn to piezometric surface
(D) None of these
Answer: Option C
Question No. 204
Pick up the correct statement from
the following:
(A) When rainfall rate exceeds the
infiltration capacity, the water enters the soil at full capacity
rate
(B) When rainfall rate is less than
the infiltration capacity, the infiltration rate is approximately
equal to the rainfall rate
(C) The actual infiltration rate at
any time may be equal to or less than the infiltration capacity
(D) All the above
Answer: Option D
Question No. 205
While calculating the average depth
of annual precipitation in a catchment basin, importance to
individual rain-gauge station is
given in
(A) Arithmetical method
(B) Thiessen's mean method
(C) Isohyetal method
(D) Both (b) and (c)
Answer: Option D
Question No. 206
If the viscosity of ground water is
1.00, the Slitcher's constant is 400, the effective size of soil
particles in aquifer is 0.5 mm and
hydraulic gradient is 1 in 80, the velocity of flow is
(A) 0.25 m/day
(B) 0.50 m/day
(C) 1.00 m/day
(D) 1.25 m/day
Answer: Option D
Question No. 207
Pick up the correct statement from
the following:
(A) Index of wetness = actual
rainfall in a year at a place/normal rainfall of that place
(B) Normal annual rainfall is
obtained by taking the mean of the annual rainfall over a period of
35 years
(C) Index of wetness gives an idea
of the wetness of the year
(D) All the above
Answer: Option D
Question No. 208
If total run off of a basin of 50
hectares is 0.8 cm, the ordinate of Bernard's distribution graph, may
be calculated by the formula (where
Q is the discharge
in cumecs at the given time)
(A) y = 50 Q
(B) y = 100 Q
(C) y = 200 Q
(D) y = 250 Q
Answer: Option D
Question No. 209
Water is useful for
(A) Running hydroelectric turbines
(B) Floating the boats and ships
(C) Providing steam for running
locomotives
(D) All the above
Answer: Option D
Question No. 210
The recurrence interval (R.I.) of
20 cm rain storm at a place is 5 years.
(A) The place will definitely have
20 cm rain storm after every five years
(B) The place may have 20 cm rain
storm after every five years
(C) The place may have 20 cm rain
storm within a set of 5 years twice
(D) None of these
Answer: Option B
Question No. 211
The main factor which affects the
infiltration capacity, is
(A) Thickness of saturated layer
(B) Depth of surface detention
(C) Soil moisture
(D) All the above
Answer: Option D
Question No. 212
If the area of storm hydrograph is
equal to 102 cm, the ordinates of a unit hydrograph may be
obtained by dividing the ordinates
of the storm hydrograph by
(A) 0.5
(B) 1
(C) 2
(D) 4
Answer: Option D
Question No. 213
The surface run off is due to
(A) Initial rain
(B) Residual rain
(C) Rain in the net supply interval
(D) All the above
Answer: Option C
Question No. 214
If the velocities of flow of a
stream of 10 m depth recorded by a current meter at depths of 2 m
and 8 m are 0.7 m and 0.3 m
respectively, the discharge per unit width of the stream in cubic
metres, is
(A) 2
(B) 3
(C) 4
(D) 5
Answer: Option D
Question No. 215
The earthen embankments constructed
parallel to the river banks at some suitable distance for
flood control, are known as
(A) Floods walls
(B) Dikes
(C) Levees
(D) Both (b) and (c)
Answer: Option D
Question No. 216
The area of a drainage basin whose
axial length is 100 km is 2500 sq. km. Its form factor is
(A) 0.10
(B) 0.20
(C) 0.25
(D) 0.35
Answer: Option C
Question No. 217
According to Robert E. Horton, the
equation of infiltration capacity curve, is (where letters carry
their usual meanings)
(A) f = fc (fo
- fc) ekt
(B) f = ft - (fo
- fc) e-kt
(C) f = ft + (fo
- fc) e-kt
(D) f = f + (fo - fc) ekt
Answer: Option C
Question No. 218
Consumptive use of a crop during
growth, is the amount of
(A) Interception
(B) Transpiration
(C) Evaporation
(D) All the above
Answer: Option D
Question No. 219
Pick up the correct statement from
the following:
(A) The intensity of rain is the
rate at which it falls
(B) The duration of rain is the
time for which it falls with a given intensity
(C) The frequency of rain is the
number of times, if falls
(D) All the above
Answer: Option D
Question No. 220
If the slope of a line for
infiltration capacity curve is 1/1.737, the value of constant k in Horton's
equation of infiltration capacity
curve, is
(A) 2.0
(B) 2.5
(C) 4.0
(D) 5.0
Answer: Option C
Question No. 221
If the grain size of soil increases
(A) Surface area decreases
(B) Specific retention decreases
(C) Water supply in well increases
(D) All the above
Answer: Option D
Question No. 222
For determination of average annual
precipitation in a catchment basin, the best method is
(A) Arithmetical method
(B) Thiessen's mean method
(C) Isohyetal method
(D) None of these
Answer: Option C
Question No. 223
Prof. Running suggested the method
for extending the discharge curve. It is known as
(A) Logarithmic method
(B) method
(C) General method
(D) None of these
Answer: Option A
Question No. 224
If the potential infiltration of a
water shed having a soil with fair pasture cover, is 10 cm and
rainfall is 12 cm, the direct run
off is :
(A) 2 cm
(B) 3 cm
(C) 5 cm
(D) 7 cm
Answer: Option C
Question No. 225
Burge formula Q = 19.6 (A/L2/3) cumecs is
based upon
(A) Rainfall and drainage area
(B) Run off and drainage area
(C) Drainage area and its shape
(D) Drainage area
Answer: Option C
Question No. 226
Precipitation includes
(A) Rain
(B) Snow
(C) Hail
(D) All of these
Answer: Option D
Question No. 227
The rainfall cycle period in India
is taken as
(A) 15 years
(B) 20 years
(C) 25 years
(D) 35 years
Answer: Option D
Question No. 228
The best unit period of a unit
hydrograph, is equal to basin lag divided by
(A) 2
(B) 3
(C) 4
(D) 5
Answer: Option C
Question No. 229
For predicting floods of a given
frequency, the best reliable method is
(A) Unit hydrograph method
(B) Gumbel's analytical method
(C) California method
(D) None of these
Answer: Option A
Question No. 230
Humidity refers to
(A) Temperature of the air
(B) Pressure of the air
(C) Moisture content of the air
(D) Volume of the air
Answer: Option C
Hydrology and Water Resources Engineering MCQS, water resources multiple choice question and answer, hydrogeology MCQ,
Question No. 231
Relative humidity is the ratio of
actual vapour pressure to the saturation vapour pressure
(A) At the same temperature
(B) At the same pressure
(C) In the same volume
(D) In the atmosphere
Answer: Option A
Question No. 232
An intense rain is falling at a
uniform rate of 7.5 cm/hour for a period of 60 minutes on a basin
whose area is 500 hectares. If the
average infiltration capacity during the entire rain period is
assumed to be 1.5 cm/hr, the
maximum run-off rate based on 10 minute peak percentage of 16%
from distributing graph of the
basin, is
(A) 40 cumecs
(B) 60 cumecs
(C) 80 cumecs
(D) 100 cumecs
Answer: Option C
Hydrology and Water Resources Engineering MCQS, water resources multiple choice question and answer, hydrogeology MCQ,
Hydrology and Water Resources Engineering MCQS, water resources multiple choice question and answer, hydrogeology MCQ,
Hydrology and Water Resources Engineering MCQS, water resources multiple choice question and answer, hydrogeology MCQ,
Hydrology and Water Resources Engineering MCQS, water resources multiple choice question and answer, hydrogeology MCQ,
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