Irrigation, Waterways , Hydrology Section 1
-
1) Question.
A culvert is designed for a peak flow Qp on the basis of rational formula. If a storm of the same intensity as used in the design and twice the duration occurs, then the resulting peak discharge will be
Answer. -
2) Question.
If a 4-hour unit hydrograph of a certain basin has a peak ordinate of 80 m^3/sec, the peak ordinate of a 2-hour unit hydrograph for the same basin will be
Answer. -
3) Question.
Consider the following statements.
1) A 100-year flood discharge is greater than a 50-year flood discharge.
2) 90% dependable flow is greater than 50% dependency flow.
3) Evaporation from salt-water surface is less than that from fresh-water surface.
Which of these statements are correct?
Answer. -
4) Question.
In a flow-mass curve study, the demand line drawn from a ridge does not intersect the mass curve again. This implies that
Answer. -
5) Question.
The maximum permissible suction lift for centrifugal pump in practice (at sea level and at 30°C) is
Answer. -
6) Question.
The spacing of tile drains to relieve waterlogged land is directly proportional to the
Answer. -
7) Question.
Probability of a 10-year flood to occur at least once in the next 4 years is
Answer. -
8) Question.
Mean precipitation over an area is best obtained from gauged amounts by
Answer. -
9) Question.
For medium silt whose average grain size is 0.16 mm, Lacey's silt factor is likely to be
Answer. -
10) Question.
Depth-Area-Duration curves of precipitation are drawn as
Answer. -
11) Question.
If p is the precipitation, a is the area represented by a rain gauge, and n is the number of raingauges in a catchment area, then the weighted mean rainfall is
Answer. -
12) Question.
A pumped storage plant is a
Answer. -
13) Question.
The most ideal condition for energy dissipation for the design of spillways is when the tail water curve
Answer. -
14) Question.
In which of the following section a breast wall is usually provided
Answer. -
15) Question.
The probably maximum precipitation at a station is
Answer. -
16) Question.
The probable maximum flood is
Answer. -
17) Question.
The sequent peak algorithm is a method used in the estimation of the
Answer. -
18) Question.
Bligh's creep theory of seepage assumes
Answer. -
19) Question.
If the coefficient of variation of rainfall values at 4 raingauge stations is 30% and permissible error in the estimation of mean rainfall is 10%, then the additional number of raingauge stations required in the catchment is
Answer. -
20) Question.
The rainfall in four successive 12 hours period on a catchment are 40, 80, 90 and 30 mm. If the infiltration index ¢ for the storm is 5 mm/hour, then the total surface run off will be
Answer.
