Q. 21 The ratio of rate of change of the discharge of an outlet to the rate of change of the discharge of distributing channel is called
A. Sensitivity
B. Proportionality
C. Flexibility
D. Setting
C. Flexibility
Q. 22 Pick up the correct equation from the following:
A. Run off = Surface run off / Ground water flow
B. Run off = Surface run off x Ground water flow
C. Run off = Surface run off + Ground water flow
D. Run off = Surface run off – Ground water flow
C. Run off = Surface run off + Ground water flow
Q. 23 A repelling groyne is aligned
A. Perpendicular to bank
B. Pointing upstream
C. Pointing downstream
D. Parallel to bank
B. Pointing upstream
Q. 24 Precipitation caused by lifting of an air mass due to the pressure difference, is called
A.
B.
C.
D.
B. Fat lime
Q. 25 Precipitation caused by lifting of an air mass due to the pressure difference, is called
A. Convective precipitation
B. Orographic precipitation
C. Cyclonic precipitation
D. None of these
C. Cyclonic precipitation
Q. 26 A 6 hours storm had 4 cm of rainfall and the resulting runoff was 2 cm. If <j) index remains at the same value, the runoff due to 10 cm rainfall in 12 hours in the catchment is
A. 7.5 cm
B. 4.5 cm
C. 6.0 cm
D. 9.0 cm
C. 6.0 cm
Q. 27 The deficiency in rain catch due to vertical acceleration of air forced upward over the gauge, is
A. Greater for large drops
B. Greater for heavy rain
C. Greater for lighter rain
D. Lesser for small rain drops
C. Greater for lighter rain
Q. 28 If y is the depth of water at any section, then the mean velocity is
A. 0.1 y
B. 0.6 y
C. 0.2 y
D. 0.7 y
B. 0.6 y
Q. 29 As compared to crest of the normal portion of the weir, the crest of the under sluice portion of weir is kept at
A. Any of the above depending on the design
B. Lower level
C. Higher level
D. Same level
B. Lower level
Q. 30 If S is the potential infiltration, P is rainfall in cm in a drainage of a soil with fair pasture cover, the direct run off Q in cm is given by
A. Q = (P – 0.2 S)²/(P + 0.8 S)
B. Q = (P – 0.1 S)²/(P + 0.4 S)
C. Q = (P – 0.2 S)²/(P + 0.6 S)
D. Q = (P – 0.2 S)²/(P + 0.2 S)
A. Q = (P – 0.2 S)²/(P + 0.8 S)
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