Irrigation, Water Resources Engineering and Hydrology MCQs Archives

101. For a flood control reservoir, the effective storage is equal to_______________?

A. useful storage – valley storage

B. useful storage + surcharge storage

C. useful storage + surcharge storage + valley storage

D. useful storage + surcharge storage -valley storage

✅ The correct answer is option D.

102. In a Sarda type fall, rectangular crest is used for discharge upto______________?

A. 6 cumecs

B. 10 cumecs

C. 14 cumecs

D. 20 cumecs

✅ The correct answer is option C.

103. When the upstream face of a gravity dam is vertical, then the intensity of water pressure at the water surface and at the base respectively will be_______________?

A. 0 and wH212

B. wH2/2and wH2/3

C. wH and 0

D. OandwII

✅ The correct answer is option D.

104. Seepage through foundation in an earthen dam is controlled by providing___________________?

A. rock toe

B. horizontal blanket

C. impervious cut off

D. chimney drain

✅ The correct answer is option C.

105. 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

✅ The correct answer is option D.

106. The stage of river carrying a discharge of Q m7sec at a point is 10 m and slope of water surface is (1/4000). The discharge of a flood at the same point and same stage of 10 m with a water surface slope of(l/1000) will be________________?

A. V2 Q m3/sec

B. 0.5 Q mVsec

C. 2 Q m3/sec

D. 4 Q m3/sec

✅ The correct answer is option C.

107. River training for depth is achieved by_______________?

A. groynes

B. construction of dykes or leavees

C. both (A) and (B)

D. groynes and bandalling

✅ The correct answer is option D.

108. Infiltration rate is always________________?

A. more than the infiltration capacity

B. less than the infiltration capacity

C. equal to or less than the infiltration capacity

D. equal to or more than the infiltration capacity

✅ The correct answer is option C.

109. If it rains between 2 P.M. and 3 P.M. and the entire basin area just starts contributing water at 3 P.M. to the outlet, then time of concentration will be_____________________?

A. 15 minutes

B. 20 minutes

C. 30 minutes

D. 60 minutes

✅ The correct answer is option D.

110. Seepage through embankments in an earthen dam is controlled by_______________?

A. drainage filters

B. relief wells

C. drain trenches

D. provision of downstream berms

✅ The correct answer is option C.