1. The use of the unit hydrograph for estimating floods is limited to catchments of size less than
[A] 50 km²
[B] 500 km²
[C] 5,000 km²
[D] 50,000 km²
Answer: Option C
2. Time of concentration is the
[A] Time of maximum possible precipitation that may concentrate and fall over a given basin.
[B] Time taken by the rainwater to flow to an existing defined drain in a basin.
[C] Time for which the rainwater remains concentrated on the basin.
[D] Maximum time taken by the rainwater to reach the outlet of the basin.
Answer: Option D
3. Kirpich’s equation is used to determine which one of the following?
[A] Run-off from a given rainfall
[B] Base time of a unit hydrograph
[C] Time of concentration in run-off hydrograph
[D] Peak flow
Answer: Option C
4. A station rating curve is a graph of
[A] Discharge versus stage for a given point on a stream, usually at the gauging station
[B] Velocity versus stage for a given point on a stream, usually at the gauging station
[C] Discharge versus velocity for a given point on a stream, usually at the gauging station
[D] Gauge height versus critical velocity of a stream, usually at the gauging station
Answer: Option A
5. The Muskingum method of flood routing is a
[A] hydraulic routing method
[B] form of reservoir routing method
[C] hydrologic channel routing method
[D] Complete numerical solution of St. Venant equations
Answer: Option C