Irrigation Engineering Set 2

Q1 | 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 your correct answer according to the coding system given below :

Q2 | When surface of transpiration is submerged under water, then potential evapotranspiration is

Q3 | Unit of runoff in M.K.S. system is

Q4 | The runoff increases with

Q5 | The area between the isohyets 45 cm and 55 cm is 100 square km and between 55 cm and 65cm is 150 square km. The average depth of annua! precipitation over the above basin of 250 square km will be

Q6 | A current meter is used to measure the

Q7 | If it rains between 2 P.M. and 3 P.M. and the entire basin area just starts contributing waterat 3 P.M. to the outlet, then time of concentration will be

Q8 | The rainfall on five successive days were measured as 100 mm, 80 mm, 60 mm, 40 mm and 20 mm respectively. If the infiltration index or the storm loss rate for the catchment area is earlier estimated as 50 mm/day, the total surface run off will be

Q9 | 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 station A, B and C were 100 mm, 90 mm and 80 mm respectively, then the storm precipitation for station X will be

Q10 | The best unit duration of storm for a unit hydrograph is

Q11 | The unit hydrograph due to a storm may be obtained by dividing the ordinates of the directrunoff hydrograph by

Q12 | The unit hydrograph of a specified duration can be used to evaluate the hydrograph ofstorms of

Q13 | S-hydrograph is used to obtain unit hydrograph of

Q14 | The relation between probability (P) and recurrence interval (T) is given by

Q15 | Dimensions of coefficient of transmissibility are

Q16 | If d is the depth of the aquifer through which water is flowing, then the relationshipbetween permeability k and transmissible T is given by

Q17 | An artesian aquifer is the one where

Q18 | A deep well

Q19 | A multipurpose reservoir is the one which is

Q20 | The useful storage is the volume of water stored in the reservoir between

Q21 | The water stored in the reservoir below the minimum pool level is called

Q22 | For a flood control reservoir, the effective storage is equal to

Q23 | Trap efficiency of a reservoir is a function of

Q24 | The total capacity of a reservoir is 25 million cubic metres and dead storage is 5 million cubic metres. If the average volume of sediment deposition is 0.10 million cubic metre per year, then the usefulness of the reservoir will start reducing after

Q25 | The forces, which are considered for the analysis of an elementary profile of a gravity dam under empty reservoir condition, arei) Water pressureii) Self weightiii) Upliftiv) Pressure due to earthquakeThe correct answer is