Questions and answers for exam Preparation

MCQs

Total Questions : 153 | Page 6 of 16 pages

Question 51. In Broad Crested Weir formula, the discharge is dependent on ________________

upstream water depth only
downstream water depth only
both upstream and downstream water depth
independent of both U/s and D/s water depth

Discuss Question

Answer: Option A. -> upstream water depth only
Answer: (a).upstream water depth only

Question 52. The foundations of bridges on erodible beds are taken down below the HFL by an amount equal to _____________

4/3 times the maximum scour depth
2/3 times the maximum scour depth
1.5 times the maximum scour depth
2 times the maximum scour depth

Discuss Question

Answer: Option A. -> 4/3 times the maximum scour depth
Answer: (a).4/3 times the maximum scour depth

Question 53. The vertical component of the earthquake wave which produces adverse effects on the stability of a dam when is acting in ____________________

upward direction
downward direction
both upward and downward direction
any direction

Discuss Question

Answer: Option B. -> downward direction
Answer: (b).downward direction

Question 54. Calculate the longitudinal braking force (P) for four-lane bridges designed for class 70R loading.

14 tonnes
21 tonnes
17.5 tonnes
35 tonnes

Discuss Question

Answer: Option B. -> 21 tonnes
Answer: (b).21 tonnes

Question 55. The greater is the heading up of water at the inlet end, the greater will be the flow velocity in case of culvert across some flat terrain.

True
False
May be True or False
Can't say

Discuss Question

Answer: Option A. -> True
Answer: (a).True

Question 56. The horizontal component of an earthquake wave producing instability in a dam is the one which acts __________________

towards the reservoir
towards the dam
away from the reservoir
away from the dam

Discuss Question

Answer: Option A. -> towards the reservoir
Answer: (a).towards the reservoir

Question 57. The vertical downward earthquake acceleration aᵥ = 0.1g acting on a gravity dam will ________________________

increase the resisting weight of the dam by 10%
decrease the resisting weight of the dam by 10%
increase the uplift by 10%
decrease the uplift by 10%

Discuss Question

Answer: Option B. -> decrease the resisting weight of the dam by 10%
Answer: (b).decrease the resisting weight of the dam by 10%

Question 58. 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?

30 KN
60 KN
130 KN
180 KN

Discuss Question

Answer: Option D. -> 180 KN
Answer: (d).180 KN

Question 59. In a concrete gravity dam with a vertical upstream face the stabilising force is provided by the ___________________

weight of the dam
the water supported against the upstream slope
uplift pressure
water pressure at the tail end

Discuss Question

Answer: Option A. -> weight of the dam
Answer: (a).weight of the dam

Question 60. A gravity dam is subjected to hydrodynamic pressure caused by __________

the rising waves of the reservoir when a flood wave enters into it
the rising waves in the reservoir due to high winds
the increase in water pressure momentarily caused by the horizontal earthquake acting towards the reservoir
the increase in water pressure momentarily caused by the horizontal earthquake acting towards the dam

Discuss Question

Answer: Option C. -> the increase in water pressure momentarily caused by the horizontal earthquake acting towards the reservoir
Answer: (c).the increase in water pressure momentarily caused by the horizontal earthquake acting towards the reservoir