Practice Test: Question Set - 03
1. 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
2. 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
3. For an annual flood series arranged in descending order of magnitude, the return for a magnitude listed at position period ‘m’ in a total is
- (A) N/(m
+ l)
- (B) m/(N
+ l)
- (C) m/N
- (D) (N + l)/m
4. 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
5. 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
6. 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 = (a1z1 + a2z2 + a3z3 + anzn)/A
7. 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
8. 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
9. 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
10. Dickens’ formula for high flood estimate, is useful only for the catchments in
- (A) Southern
India
- (B) Northern
India
- (C) Eastern
India
- (D) Western
India
11. 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
12. 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
13. For a proportional outlet, the flexibility is
- (A) Zero
- (B) Between zero
and 1
- (C) 1
- (D) Greater than
1
14. 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
15. 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