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
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