Irrigation, Waterways , Hydrology Section 10
-
1) Question.
The best unit duration of storm for a unit hydograph is
Answer. -
2) Question.
The normal annual precipitation at stations X, A, B and C are 700 mm, 1000 mm, 900 mm and 800 mm respectively. If the storm precipitation at three stations A, B and C were 100 mm, 90 mm and 80 mm respectively, then the storm precipitation for station X will be
Answer. -
3) Question.
The rain on five successive days were measured as 100 mm, 80 mm, 60 mm, 40 mm and 20 mm respectively. If the infiltration index or thw storm loss rate for the catchment area is earlier estimated as 50 mm/day, the total surface runoff will be
Answer. -
4) Question.
If it rains between 2 PM and 3 PM and the entire basin area just starts contributing water at 3 PM to the outlet, then tine of concentration will be
Answer. -
5) Question.
A current meter is used to measure the
Answer. -
6) Question.
The area between the isohyets 45cm and 55cm is 100 square km and between 55cm and 65cm is 150 square km. The average depth of precipitation over the above basin if 250 square km will be
Answer. -
7) Question.
The runoff increases with
Answer. -
8) Question.
Unit of runoff in M.K.S system is
Answer. -
9) Question.
Coefficient of variation is given by
Answer. -
10) Question.
When surface of transpiration is submerged under water, then potential evapotranspiration is
Answer. -
11) Question.
Assertion A : To estimate the rainfall over a catchment, the number of raingauges required per unit area is large for hilly areas.
Reason R : Rainfall gradient is steep.
Select the correct answer according to the coding system given below.
Answer. -
12) Question.
Under the same conditions, which of the following shapes of water surface will give the highest rate of evaporation?
Answer. -
13) Question.
A 70% index of wetness means
Answer. -
14) Question.
Rate of evaporation from a water surface increases if
i) difference of vapour pressure between water and air is increased
ii) velocity of wind is decreased
iii) concentration of soluble solids in water is decreased
The correct answer is
Answer. -
15) Question.
Which of the following types of raingauges is used for measuring rain in remote hilly inaccessible areas?
Answer. -
16) Question.
If allowable percentage error in the estimate of basic rainfall is E and coefficient of variation of rainfall is Cv, then the optimum number of raingauges is given by
Answer. -
17) Question.
A raingauge should preferably be fixed
Answer. -
18) Question.
Which of the following is a non-recording raingauge?
Answer. -
19) Question.
If the intensity of rainfall is more than the infiltration capacity of the soil, then the infiltration rate will be
Answer. -
20) Question.
Infiltration is the
Answer.
