Irrigation Engineering Mock Test 8

10%

Question 1 of 10

1. Average yield of a storage reservoir is the arithmetic average of its ________________

firm and secondary yields over a long period

secondary yields over a long period

reservoir yield over a long period

firm yields over a long period

Question 1 of 10

Question 2 of 10

2. What is the value of horizontal destabilizing force caused by the formation of waves in a storage reservoir having a fetch of 52 km due to high wind of 172 km/h?

180 KN

60 KN

130 KN

30 KN

Question 2 of 10

Question 3 of 10

3. The provision of drainage gallery in a gravity dam helps in reducing ____________________

both hydrostatic pressure and seepage pressure

silt pressure

seepage pressure

hydrostatic pressure

Question 3 of 10

Question 4 of 10

4. Provision of horizontal berms at suitable vertical intervals may be provided in the downstream face of an earthen dam in order to _________________

increase the erosion

allow the movement of cattle

allow the inspection of vehicles to move

reduce the erosion caused by the flowing rainwater

Question 4 of 10

Question 5 of 10

5. The collection and removal of water before it acquires high downward velocities is ensured by provision of ____________________

spoil banks

burrow pits

berms

freeboard

Question 5 of 10

Question 6 of 10

6. The lowest portion of the capacity-elevation curve of a proposed irrigation reservoir draining 20 km2 of catchment is represented by the following data:
i. The rate of silting for the catchment = 300 m₃ / km² / year
ii. Life of the reservoir = 50 years
iii. Dead storage = 30
iv. The FSD of the canal at the head = 80 cm
v. The crop water requirement = 250 ha.m
vi. Dependable yield of the catchment = 0.29 m
Calculate the gross capacity of the reservoir.

317.5 ha.m

580 ha.m

287.5 ha.m

37.5 ha.m

Question 6 of 10

Question 7 of 10

7. Leakage through the transverse joints in a gravity dam is prevented by ____________

keyways

galleries

shear keys

water stops

Question 7 of 10

Question 8 of 10

8. Calculate the value of minimum base width for an elementary triangular concrete gravity dam supporting 72 m height of reservoir water and full uplift? (Take specific gravity of concrete as 2.4 and coefficient of friction as 0.7)

73.5 m

51.5 m

39.77 m

36.28 m

Question 8 of 10

Question 9 of 10

9. Which of the following statement is correct with reference to earthen dams?

Gravity dams are less susceptible to failure as compared to rigid dams

Highly skilled labor is generally not required

These dams are very costly as compared to other types

These dams are suitable for construction on almost every type of foundation

Question 9 of 10

Question 10 of 10

10. The upward acceleration of dam due to seismic activity will ________________________

not affect the effective weight of the dam

increase the base pressure

increase the horizontal dynamic force

decrease the base pressure

Question 10 of 10