Q.1
The uplift pressure on the roof of an inverted syphon, is maximum when
  • Drain in running dry
  • Canal is running dry
  • Canal is running with F.S.L.
  • Drain is running with H.F.L.
Q.2
The ratio of the average load to the installed capacity of the plant whose reserve capacity is zero will be equal to
  • Load factor
  • Plant factor
  • Utilization factor
  • Both (A) and (B)
Q.3
The length of a meander is the distance along the river between the tangent point of one curve to the tangent point of
  • Reverse curve
  • Next curve of the same order
  • Reverse curve plus the width of the river
  • None of these
Q.4
The consumptive use of water for a crop
  • Is measured as the volume of water per unit area
  • Is measured as depth of water on irrigated area
  • May be supplied partly by precipitation and partly by irrigation
  • All the above
Q.5
A divide wall is provided
  • At right angle to the axis of weir
  • Parallel to the axis of weir and upstream of it
  • Parallel to the axis of weir and downstream of it
  • At an inclination to the axis of weir
Q.6
A 6 hours storm had 4 cm of rainfall and the resulting runoff was 2 cm. If ϕ index remains at the same value, the runoff due tocm of rainfall inhours in the catchment is
  • 4.5 cm
  • 6.0 cm
  • 7.5 cm
  • 9.0 cm
Q.7
A multipurpose reservoir is the one which is
  • designed for one purpose but serves more than one purpose
  • planned and constructed to serve various purposes
  • both (A) and (B)
  • none of the above
Q.8
V and R are the regime mean velocity and hydraulic mean depth respectively in meters. Lacey's silt factor f is
  • 2V²/√3 R
  • 3V²/4R
  • 5V²/2R
  • 2V²/5R
Q.9
Useful soil moisture for plant growth, is
  • Capillary water
  • Gravity water
  • Hygroscopic water
  • Chemical water
Q.10
Aindex of wetness means
  • rain excess of 30%
  • rain deficiency of 30%
  • rain deficiency of 70%
  • none of the above
Q.11
According to Kennedy, the critical velocity (V₀) in meters in a channel is the mean velocity which keeps the channel free from silting or scouring. Its value is given by (where m is critical velocity ratio and D is the depth of the channel).
  • V₀ = 0.84 mD0.64
  • V₀ = 0.55 mD0.64
  • V₀ = 0.84 mD0.54
  • V₀ = 0.55 mD0.54
Q.12
The main cause of meandering is
  • presence of an excessive bed slope in the river
  • degradation
  • the extra turbulence generated by the excess of river sediment during floods
  • none of the above
Q.13
Under the same conditions, which of the following shapes of water surface will give the highest rate of evaporation ?
  • flat water surface
  • convex water surface
  • concave water surface
  • independent of shape of water surface
Q.14
The scour depth D of a river during flood, may be calculated from the Lacey's equation
  • D = 0.47 (Q/f)
  • D = 0.47 (Q/f)1/2
  • D = 0.47 (Q/f)1/3
  • D = 0.47 (Q/f)2/3
Q.15
For a unique design of a channel by Kennedy's theory
  • Its breadth must only be known
  • Its depth must only be known
  • Its breadth and depth ratio must only be known
  • All the above
Q.16
An artesian aquifer is the one where
  • water surface under the ground is at atmospheric pressure
  • water is under pressure between two impervious strata
  • water table serves as upper surface of zone of saturation
  • none of the above
Q.17
A river is said to be of
  • Aggrading type if it builds up its bed to a certain slope
  • Degrading type if it cuts its bed to a certain slope
  • Meandering type if it flows in sinuous curve
  • All the above
Q.18
Trap efficiency of a reservoir is a function of
  • capacity/inflow ratio
  • capacity/outflow ratio
  • outflow/inflow ratio
  • none of the above
0 h : 0 m : 1 s