Questions and answers for exam Preparation

MCQs

Total Questions : 845 | Page 3 of 85 pages

Question 21. The area between the isohyets 45 cm and 55 cm is 100 square km and between 55 cm and 65 cm is 150 square km. The average depth of annua! precipitation over the above basin of 250 square km will be

50 cm
55 cm
56 cm
60 cm

Discuss Question

Answer: Option C. -> 56 cm

Question 22. Which of the following canal outlets maintains a constant discharge ?

non-modular outlet
flexible outlet
rigid module
none of the above

Discuss Question

Answer: Option C. -> rigid module

Question 23. 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

70mm
80mm
90 mm
105 mm

Discuss Question

Answer: Option A. -> 70mm

Question 24. The level of the floor of a syphon aqueduct can be obtained

By subtracting the depth of the culvert from the canal bed level
By subtracting the thickness of culvert plus the depth of the culvert from the canal bed level
Both (A) and (B)
None of these

Discuss Question

Answer: Option B. -> By subtracting the thickness of culvert plus the depth of the culvert from the canal bed level

Question 25. F.S.L. of a canal at its head with respect to parent channel is kept

At the same level
15 cm lower
15 cm higher
None of these

Discuss Question

Answer: Option B. -> 15 cm lower

Question 26. The ratio of the head recovered to the head put in, is known as

Efficiency
Sensitivity
Flexibility
Modular limit

Discuss Question

Answer: Option A. -> Efficiency

Question 27. Pick up the incorrect statement from the following

Side walls of a venturi head flume are splayed out from the end of the throat at 1 : 10 for a length of 4.5 m
Length of side walls should be such that the width of the flume is made equal to 2/3rd the bed width of the distributary
Once the width of the flume becomes 2/3rd of the width of the distributary, the splayed walls are increased to 1 in 3 to get full bed width
None of these

Discuss Question

Answer: Option D. -> None of these

Question 28. According to Khosla, the exits gradient of surface flow

Depends upon the b/d ratio
Is independent of the b/d ratio
Is independent of the depths of d/s cut off walls
None of these

Discuss Question

Answer: Option A. -> Depends upon the b/d ratio

Question 29. In case of non-availability of space due to topography, the most suitable spillway is

straight drop spillway
shaft spillway
chute spillway
ogee spillway

Discuss Question

Answer: Option B. -> shaft spillway

Question 30. 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 :