Civil Engineering : Water Resources Engineering MCQs with Answers

1 .
Water is useful for_______.
A)  floating the boats and ships
B)  running hydroelectric turbines
C)  providing steam for running locomotives
D)  All of the above

Correct Answer :   All of the above

2 .
In nature water may occur as______.
A)  solid
B)  liquid
C)  vapours
D)  All of the above

Correct Answer :   All of the above

3 .
Hydrology is the science which deals with_______.
A)  sea water
B)  surface and underground water
C)  rain water
D)  river water

Correct Answer :   surface and underground water

4 .
For calculating the evaporation rate over a reservoir surface E = 0.771 (1.465 - 0.00732 B) (0.44 - 0.007375 V) (pe - pa), the equation is given by
A)  Dalton's formula in M.K.S
A)  
B)  Dalton's formula in F.P.S
B)  
C)  Roohwer's, formula in M.K.S
C)  
D)  Roohwer's formula in F.P.S
D)  

Correct Answer :   Roohwer's, formula in M.K.S

5 .
Pick up the correct statement from the following :
A)  Run off is sometimes called discharge of the river
B)  Run off and surface run off are the same
C)  Surface run off is sometimes called stream flow
D)  Run off includes the water flowing over the surface

Correct Answer :   Run off is sometimes called discharge of the river

6 .
The surface run off is due to__________.
A)  initial rain
B)  residual rain
C)  rain in the net supply interval
D)  All of the above

Correct Answer :   rain in the net supply interval

7 .
Hydrograph is a graphical representation of______.
A)  rain fall
B)  surface run off
C)  ground water flow
D)  discharge flowing in the river

Correct Answer :   discharge flowing in the river

8 .
For the estimate of high floods in fan-shaped catchment, the formula used is________.
A)  Ryve's formula
B)  Inglis formula
C)  Dicken's formula
D)  None of the above

Correct Answer :   Inglis formula

9 .
Burge formula Q=19.6 A/L⅔ cumecs is based upon
A)  drainage area and its shape
A)  
B)  drainage area
B)  
C)  run off and drainage area
C)  
D)  rainfall and drainage area
D)  

Correct Answer :   drainage area and its shape

10 .
Pick up the correct statement from the following :
A)  Perched aquifer is found in unconfined aquifer
B)  Perched aquifer is formed in unfined accquifer if an impervious layer exists
C)  The top surface of the water held in the perched aquifer, is known as perched water table
D)  All of the above

Correct Answer :   All of the above

11 .
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 auifer, is
A)  1.585 m²/minute
A)  
B)  1.485 m²/minute
B)  
C)  1.385 m²/minute
C)  
D)  1.285 m²/minute
D)  

Correct Answer :   1.385 m²/minute

12 .
Pick up the correct statement from the following :
A)  Run off is expressed as total volume per day
B)  Yield of a drainage basin is the run off over long periods
C)  Yield of a drainage basin is the run off at any time
D)  Yield of a drainage basin is expressed as surface run off per year

Correct Answer :   Yield of a drainage basin is the run off over long periods

13 .
Run off includes_______.
A)  surface run off
B)  ground water flow
C)  precipitation over catchment area of the stream and its attributaries
D)  All of the above

Correct Answer :   All of the above

14 .
A soil strata may consist of________.
A)  soil zone
B)  intermediate zone
C)  capillary zone
D)  All of the above

Correct Answer :   All of the above

Explanation : * soil zone
* intermediate zone
* capillary zone
* ground water zone

15 .
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)  4.0
B)  3.5
C)  3.0
D)  2.5

Correct Answer :   4.0

16 .
Shrouding is provided in_________.
A)  cavity type tube wells
B)  strainer type tube wells
C)  slotted type tube wells
D)  perforated type tube wells

Correct Answer :   slotted type tube wells

17 .
The efficiency of a pump may be taken as____
A)  0.70
B)  0.65
C)  0.60
D)  0.55

Correct Answer :   0.65

18 .
The equation P - Q = Te φindex for determining the infiltration capacity, was suggested by
A)  Horton
A)  
B)  Llyod
B)  
C)  Horner
C)  
D)  Bernard
D)  

Correct Answer :   Horton

19 .
Pressure exerted by fully saturated air, is known_______.
A)  saturation pressure
B)  saturation vapour pressure
C)  Both (A) and (B)
D)  vapour pressure

Correct Answer :   Both (A) and (B)

20 .
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 the above

Correct Answer :   dew will be formed

21 .
Humidity refers to___.
A)  volume of the air
B)  pressure of the air
C)  temperature of the air
D)  moisture content of the air

Correct Answer :   moisture content of the air

22 .
Humidity refers to___.
A)  volume of the air
B)  pressure of the air
C)  temperature of the air
D)  moisture content of the air

Correct Answer :   moisture content of the air

23 .
The infiltration capacity during rain storm, is considerably reduced due to____.
A)  soil moisture
B)  surface detention
C)  compaction due to rain
D)  All of the above

Correct Answer :   All of the above

Explanation : * soil moisture
* surface detention
* compaction due to rain
* washing of fine particles

24 .
For high flood estimates the average value of the constant C in Dicken's formula Q = CA3/4, is_____.
A)  11.5
A)  
B)  10.5
B)  
C)  9.5
C)  
D)  8.5
D)  

Correct Answer :   11.5

25 .
Boston society of Civil Engineer's formula Q=0.0056 D/t in cumecs/square km is based upon______.
A)  drainage area
B)  rainfall and drainage area
C)  total run off and drainage area
D)  drainage area and its shape

Correct Answer :   total run off and drainage area

26 .
Pettis formula Q = C (P.B)5/4 cumecs, is based upon______.
A)  drainage area
A)  
B)  rainfall and drainage area
B)  
C)  run off and drainage area
C)  
D)  drainage area and its shape
D)  

Correct Answer :   rainfall and drainage area

27 .
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)  8 cm
B)  5 cm
C)  3 cm
D)  2 cm

Correct Answer :   5 cm

28 .
The quantity of water retained by the sub-soil against gravity, is known______.
A)  specific retention
B)  yield
C)  porosity
D)  specific yield

Correct Answer :   specific retention

29 .
Pick up the incorrect statement from the following :
A)  The term 'transmissibility' was introduced by Meinzer
B)  The flow of water through acquifers, is governed by the Darcy's law
C)  The rate of flow of water through a unit cross-sectional area under a unit hydraulic gradient, is called coefficient of permeability
D)  The ratio of coefficient of transmissibility and coefficient of permeability, is equal to the depth of acquifer through which water flows.

Correct Answer :   The term 'transmissibility' was introduced by Meinzer

30 .
If the viscosity of ground water is 1.00, the Slitcher's constant is 400, the effective size of soil particles in acquifer is 0.5 mm and hydraulic gradient is 1 in 80, the velocity of flow is_____.
A)  0.50 m/day
B)  0.75 m/day
C)  1.00 m/day
D)  1.25 m/day

Correct Answer :   1.25 m/day

31 .
Relative humidity is the ratio of actual vapour pressure to the saturation vapour pressure_____.
A)  in the atmosphere
B)  in the same volume
C)  at the same temperature
D)  at the same pressure

Correct Answer :   at the same temperature

32 .
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 the above

Correct Answer :   The air from central portion of cyclone's gets lifted for causing precipitation

33 .
Precipitation caused due to upward movement of warmer air as compared to surrounding air, is called_____.
A)  convective precipitation
B)  cyclonic precipitation
C)  orographic precipitation
D)  None of the above

Correct Answer :   convective precipitation

34 .
For predicting floods of a given frequency, the best reliable method is_________.
A)  Unit hydrograph method
B)  California method
C)  Gumbel's analytical method
D)  None of the above

Correct Answer :   Unit hydrograph method

35 .
The earthen embankments constructed parallel to the river banks at some suitable distance for flood control, are known as____.
A)  levees
B)  dikes
C)  Both (A) and (B)
D)  floods walls

Correct Answer :   Both (A) and (B)

36 .
The Dupuit formula is based on______.
A)  one observation well
B)  two observation wells
C)  three observation wells
D)  no observation well

Correct Answer :   no observation well

37 .
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)  8/7
A)  
B)  7/8
B)  
C)  5/4
C)  
D)  2/3
D)  

Correct Answer :   8/7

38 .
Evaporation losses depend upon______.
A)  atmospheric temperature
B)  humidity and wind velocity
C)  area of the water surface and depth of the water
D)  All of the above

Correct Answer :   All of the above

39 .
Phytometer method is generally used for the measurement of____.
A)  evaporation
B)  transpiration
C)  interception
D)  None of the above

Correct Answer :   transpiration

40 .
The run off a drainage basin is________.
A)  Precipitation - ground water accretion - initial recharge
B)  Precipitation - ground water accretion + initial recharge
C)  Initial recharge + ground water accretion + precipitation
D)  Precipitation + ground water accretion + initial recharge

Correct Answer :   Precipitation - ground water accretion - initial recharge

41 .
For computing the run off volumes of large areas, number of infiltrations used are____.
A)  2
B)  3
C)  4
D)  5

Correct Answer :   2

42 .
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)  1 hour
B)  2 hours
C)  3 hours
D)  4 hours

Correct Answer :   4 hours

43 .
Precipitation caused due to striking of air masses with a topographical feature, is called_____.
A)  cyclonic precipitation
B)  orographic precipitation
C)  convective precipitation
D)  None of the above

Correct Answer :   orographic precipitation

44 .
The specifications of most commonly used standard gauges in India, are________.
A)  100 sq. cm collector and 2 litres bottle
B)  100 sq. cm collector and 4 litres bottle
C)  200 sq. cm collector and 4 litres bottle
D)  200 sq. cm collector and 10 litres bottle

Correct Answer :   200 sq. cm collector and 4 litres bottle

45 .
In the estimate of design flood, Dickens assumes that high flood in cumecs, is proportional to catchment area raised to the power___.
A)  1 / 2
B)  1 / 4
C)  3 / 4
D)  2 / 3

Correct Answer :   3 / 4

46 .
If the grain size of soil increases_________.
A)  surface area decreases
B)  specific yield increases
C)  specific retention decreases
D)  All of the above

Correct Answer :   All of the above

Explanation : * surface area decreases
* specific yield increases
* specific retention decreases
* water supply in well increases

47 .
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

Correct Answer :   20 mm

48 .
The best unit period of a unit hydrograph, is equal to basin lag divided by___.
A)  2
B)  3
C)  4
D)  5

Correct Answer :   4

49 .
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 = 100 Q
B)  y = 150 Q
C)  y = 200 Q
D)  y = 250 Q

Correct Answer :   y = 250 Q

50 .
Time of overland flow, is affected by___.
A)  type of the ground surface
B)  slope of the basin
C)  length of the flow path
D)  All of the above

Correct Answer :   All of the above

51 .
From the data of the rain storm shown in the below figure, the value of Windex is____
A)  2 cm/hour
A)  
B)  2.2 cm/hour
B)  
C)  2.5 cm/hour
C)  
D)  1.5 cm/hour
D)  

Correct Answer :   2.5 cm/hour

52 .
From the pattern of the rainfall shown in the below figure, the total precipitation is____.
A)  6 cm
A)  
B)  5.5 cm
B)  
C)  5 cm
C)  
D)  4.5 cm
D)  

Correct Answer :   5.5 cm

53 .
The best instrument for measuring the velocity of a stream flow is___.
A)  pitot tube
B)  surface float
C)  sub-surface float
D)  Price's current meter

Correct Answer :   Price's current meter

54 .
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)  4
B)  3
C)  2
D)  1

Correct Answer :   4

55 .
A hydraulic jump in a control meter will be formed above the control, if its original_____.
A)  depth is equal to critical depth
B)  depth is less than the critical depth
C)  depth is more than critical depth
D)  All of the above

Correct Answer :   depth is less than the critical depth

56 .
Prof. Running suggested the method for extending the discharge curve. It is known as___.
A)  √y method
B)  General method
C)  Logarithmic method
D)  None of the above

Correct Answer :   Logarithmic method

57 .
If y is the depth of water at any section, then the mean velocity is____.
A)  0.6 y
B)  0.5 y
C)  0.3 y
D)  0.2 y

Correct Answer :   0.6 y

58 .
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
A)  
B)  77 mm
B)  
C)  79 mm
C)  
D)  81 mm
D)  

Correct Answer :   77 mm

59 .
The area enclosed by the adjacent isohyets of a catchment basin are shown under :
The average depth of annual precipitation in the catchment basin will be :
A)  63.5 cm
A)  
B)  62.5 cm
B)  
C)  61.5 cm
C)  
D)  60.5 cm
D)  

Correct Answer :   63.5 cm

60 .
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

Correct Answer :   0.2 h and 0.8 h

61 .
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)  3
B)  4
C)  5
D)  6

Correct Answer :   5

62 .
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)  duration of the rainfall
D)  concentration time of overland flow

Correct Answer :   time of concentration

63 .
The rainfall at any place is described by____.
A)  its duration
B)  its frequency
C)  its intensity
D)  All of the above

Correct Answer :   All of the above

64 .
Discharge curve may be extended by logarithmic method if____.
A)  river is of any type
B)  river is broader and shallower
C)  cross section of river is uniform
D)  None of the above

Correct Answer :   cross section of river is uniform

65 .
The run off is affected by__________.
A)  type of precipitation
B)  direction of prevailing storm
C)  rain intensity and duration of rainfall
D)  All of the above

Correct Answer :   All of the above

Explanation : * type of precipitation
* direction of prevailing storm
* rain intensity and duration of rainfall
* rain distribution and soil moisture deficiency

66 .
The initial basin recharge is equal to_____.
A)  interception
B)  depression storage
C)  rain absorbed by the moisture deficiency
D)  All of the above

Correct Answer :   All of the above

67 .
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

Correct Answer :   greater for lighter rain

68 .
If a gauge is installed perpendicular to the slope, its measurement is reduced by multiplying________.
A)  cosine of the angle of inclination with vertical
B)  calibration coefficient of the gauge
C)  sine of the angle of inclination with vertical
D)  tangent of the angle of inclination with vertical

Correct Answer :   cosine of the angle of inclination with vertical

69 .
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 the above

Correct Answer :   Isohyetal method

70 .
The recurrence interval (R.I.) of 20 cm rain storm at a place is 5 years.
A)  The place may have 20 cm rain storm after every five years
B)  The place may have 20 cm rain storm within a set of 5 years twice
C)  The place will definitely have 20 cm rain storm after every five years
D)  All of the above

Correct Answer :   The place may have 20 cm rain storm after every five years

71 .
Sharp crested weirs are generally used_____.
A)  for small flows
B)  for large flows
C)  for rivers carrying floating debris
D)  for streams carrying high sediment loads

Correct Answer :   for large flows

72 .
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

Correct Answer :   three times the critical depth

73 .
A control meter is preferred to a weir because_______.
A)  it is not damaged by floating debris
B)  it measures the discharge even in silt laiden streams
C)  the velocity of approach of the channel increases above the control, and thus removes the silt completely
D)  All of the above

Correct Answer :   All of the above

74 .
Symon's rain gauge is________.
A)  non-recording gauge
B)  weighing type gauge
C)  tipping-bucket gauge
D)  float recording gauge

Correct Answer :   non-recording gauge

75 .
The rainfall cycle period in India is taken as_______.
A)  30 years
B)  35 years
C)  20 years
D)  25 years

Correct Answer :   35 years

76 .
Isohytes are the imaginary lines joining the points of equal_____.
A)  height
B)  pressure
C)  rainfall
D)  humidity

Correct Answer :   rainfall

77 .
The polythene bottles are used for collecting rain water and. their capacities is_____.
A)  2 litres
B)  4 litres
C)  10 litres
D)  All of the above

Correct Answer :   All of the above

78 .
Rain simulators are used for the determination of_______.
A)  run off
B)  evaporation
C)  precipitation
D)  infiltration capacity

Correct Answer :   infiltration capacity

79 .
While calculating the average depth of annual precipitation in a catchment basin, importance to individual raingauge station is given in_____.
A)  Isohyetal method
B)  Thiessen's mean method
C)  Both (A) and (B)
D)  Arithmetical method

Correct Answer :   Both (A) and (B)

80 .
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 of the above

Correct Answer :   All of the above

Explanation : * a segment of a circle can be fitted
* a parabolic section can be fitted
* a rectangular section can be fitted
* a trapezoidal section can be fitted

81 .
The area of a drainage basin whose axial length is 100 km is 2500 sq. km. Its form factor is____.
A)  0.20
B)  0.25
C)  0.30
D)  0.35

Correct Answer :   0.25

82 .
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)  245 sq. km
B)  235 sq. km
C)  225 sq. km
D)  215 sq. km

Correct Answer :   245 sq. km

83 .
Run off is measured in____.
A)  cubic metres
B)  cubic metres per sec
C)  cubic metres per minute
D)  cubic metres per hour

Correct Answer :   cubic metres per sec

84 .
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

Correct Answer :   percentage of total surface run off during uniform time intervals on y-axis

85 .
An intense rain is falling at a uniform rate of 7.5 cm/hour for a period of 60 minutes on a basin whose areas 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
A)  
B)  60 cumecs
B)  
C)  80 cumecs
C)  
D)  100 cumecs
D)  

Correct Answer :   80 cumecs

86 .
Non-recording rain gauges_____.
A)  are cylindrical in shape
B)  are generally used in hilly terrain
C)  collect the rain whose volume is measured by means of graduated cylinders
D)  collect the rain which is directly measured by means of graduated cylinders in centimetres of water depth

Correct Answer :   collect the rain which is directly measured by means of graduated cylinders in centimetres of water depth

87 .
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

Correct Answer :   100 or 200 sq. cm area

88 .
Isopiastic lines are the contours_____.
A)  drawn to piezometric surface
B)  drawn to represent water table
C)  drawn to represent piezometric heads
D)  None of the above

Correct Answer :   drawn to piezometric surface

89 .
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)  1/2 (h1 + h2)
A)  
B)  H = h2 - h1
B)  
C)  H = h1 - h2
C)  
D)  H = h2 + h1
D)  

Correct Answer :   1/2 (h1 + h2)

90 .
The radius of influence is______.
A)  radius of the main well
B)  distance from the centre of main well to the point of zero draw down
C)  distance from the wall of main well to the point of zero draw down
D)  All of the above

Correct Answer :   distance from the centre of main well to the point of zero draw down

91 .
Precipitation caused by lifting of an air mass due to the pressure difference, is called______.
A)  convective precipitation
B)  cyclonic precipitation
C)  orographic precipitation
D)  None of the above

Correct Answer :   cyclonic precipitation

92 .
The standard height of a standard rain gauge, is________.
A)  10 cm
B)  20 cm
C)  25 cm
D)  30 cm

Correct Answer :   30 cm

93 .
In India, rain fall is generally recorded at
A)  8 A.M
B)  1 P.M
C)  4 P.M
D)  8 P.M

Correct Answer :   8 A.M

94 .
A recording type rain gauge______.
A)  records the cumulative rain
B)  produces a mass curve of rain fall
C)  is sometimes called integrating rain gauge or continuous rain gauge
D)  All of the above

Correct Answer :   All of the above

95 .
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)  0.01 cm/sec
A)  
B)  0.001 cm/sec
B)  
C)  0.002 cm/sec
C)  
D)  0.0005 cm/sec
D)  

Correct Answer :   0.001 cm/sec

96 .
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)  0.20 h
C)  0.25 h
D)  0.3 h

Correct Answer :   0.25 h

97 .
If the loss due to friction in pipes is 4 m, the total losses in strainer and bends may be taken as_______.
A)  1.0 m
B)  0.5 m
C)  0.20 m
D)  0.10 m

Correct Answer :   1.0 m

98 .
In India the recording type rain gauge generally used, is______.
A)  tipping type
B)  float recording type
C)  weighing type
D)  None of the above

Correct Answer :   float recording type

99 .
The main factor which affects the infiltration capacity, is____.
A)  soil moisture
B)  depth of surface detention
C)  thickness of saturated layer
D)  All of the above

Correct Answer :   All of the above

100 .
Absolute humidity in air________.
A)  decreases at higher altitudes
B)  increases at higher altitudes
C)  remains constant at all altitudes
D)  None of the above

Correct Answer :   decreases at higher altitudes

101 .
The surface Run-off is the quantity of water_____.
A)  absorbed by soil
B)  that reaches the stream channels
C)  required to fill surface depressions
D)  intercepted by buildings and vegetative cover

Correct Answer :   that reaches the stream channels

102 .
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

Correct Answer :   Run off = Surface run off + Ground water flow

103 .
Infiltration capacity of soil depends upon_____.
A)  arrangement of soil particles
B)  shape and size of soil particles
C)  compaction of the soil particles
D)  All of the above

Correct Answer :   All of the above

Explanation : * arrangement of soil particles
* shape and size of soil particles
* compaction of the soil particles
* number of voids present in the soil

104 .
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

Correct Answer :   two hydrogen atoms and one oxygen atom

105 .
Unit Hydrograph theory was enunciated by_______.
A)  Le-Roy K. Shermen
B)  W.W. Horner
C)  Merril Bernard
D)  Robert E. Horten

Correct Answer :   Le-Roy K. Shermen

106 .
In estimating the rate of evaporation from the reservoir surface, a pan 1.5 metres in diameter, was filled upto 8.0 cm. During a specified period of time, the rainfall recorded was 5 cm. 3 cm of water was removed from the pan to keep the depth of water. At the end of the time, the depth was 9 cm. If the pan coefficient is 0.6, the evaporation loss is____.
A)  2 mm
A)  
B)  4 mm
B)  
C)  6 mm
C)  
D)  10 mm
D)  

Correct Answer :   6 mm

107 .
Dicken's formula for high flood estimate, is useful only for the catchments in___.
A)  Southern India
B)  Northern India
C)  Eastern India
D)  Western India

Correct Answer :   Northern India

108 .
Levees and flood walls,_____.
A)  are means of controlling floods
B)  are designed with adequate dimensions
C)  are never provided free-boards
D)  are designed to carry unbalanced water load

Correct Answer :   are never provided free-boards

109 .
Ryve's formula for flood estimate in cumecs, is______.
A)  Q = CA1/4
A)  
B)  Q = CA3/4
B)  
C)  Q = CA1/2
C)  
D)  Q = CA2/3
D)  

Correct Answer :   Q = CA2/3

110 .
The theory of infiltration capacity was given by____.
A)  Robert E. Horten
B)  W.W. Horner
C)  Merrill Bernard
D)  Le-Roy K. Shermen

Correct Answer :   Robert E. Horten

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