Questions and answers for exam Preparation

MCQs

Total Questions : 88 | Page 6 of 9 pages

Question 51. Which of the following plot is useful in determining the clearance for the spillway deck bridge and the top levels of walls on the side of the spillway?

The coordinates of the lower nappe
The coordinates of the upper nappe
Both the coordinates of upper and lower nappe
The origin or apex of crest

Discuss Question

Answer: Option B. -> The coordinates of the upper nappe
Answer: (b).The coordinates of the upper nappe

Question 52. What is the satisfactory radius for the reverse bottom curve which is provided at the downstream end of the spillway?

One-fourth of the spillway height
Equal to the spillway height
Half the value of the spillway height
One-third of the spillway height

Discuss Question

Answer: Option A. -> One-fourth of the spillway height
Answer: (a).One-fourth of the spillway height

Question 53. According to US Army Corps, the u/s profile of ogee spillway extends up to _______________

x = 1.27 Hd
x = -1.27 Hd
x = 0.431 Hd
x = -0.431 Hd

Discuss Question

Answer: Option B. -> x = -1.27 Hd
Answer: (b).x = -1.27 Hd

Question 54. What is the assumption that is taken during the entire design of an overflow spillway?

The upper and lower nappe is subjected to negative pressures
The upper and lower nappe is subjected to full atmospheric pressure
The upper and lower nappe is subjected to zero atmospheric pressure
The upper and lower nappe is subjected to both positive and negative pressure

Discuss Question

Answer: Option B. -> The upper and lower nappe is subjected to full atmospheric pressure
Answer: (b).The upper and lower nappe is subjected to full atmospheric pressure

Question 55. If the spillway is constructed in continuation to the dam at one end, it may be called as ________

saddle weir
flank weir
waste weir
temporary weir

Discuss Question

Answer: Option B. -> flank weir
Answer: (b).flank weir

Question 56. Which of the following is the simplest type of spillway which can be provided independently and at low costs?

Ogee spillway
Trough spillway
Siphon spillway
Saddle spillway

Discuss Question

Answer: Option B. -> Trough spillway
Answer: (b).Trough spillway

Question 57. The greater is the divergence from the streamline flow, greater is the contraction coefficient.

True
False
May be True or False
Can't say

Discuss Question

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

Question 58. Calculate the effective length of the spillway which consists of 6 spans having a clear width of 10 m each. The thickness of each pier may be taken as 2.5 m and the total design head on the crest including velocity head is 16.3 m. Assuming 90° cut water nose piers and rounded abutments.

55 m
60 m
65 m
75 m

Discuss Question

Answer: Option A. -> 55 m
Answer: (a).55 m

Question 59. The only spillway among the following through which the discharge does not increase as fast as it increases in all others is _________________