Questions and answers for exam Preparation

MCQs

Total Questions : 88 | Page 7 of 9 pages

Question 61. The only spillway among the following through which the discharge is almost at its capacity rate even from the start of its functioning is ________________

chute spillway
side-channel spillway
ogee spillway
siphon spillway

Discuss Question

Answer: Option D. -> siphon spillway
Answer: (d).siphon spillway

Question 62. An air vent is provided at FRL to break the siphoning action at that level in a ___________________

hooded type of siphon spillway
tilted outlet type of siphon spillway
saddle siphon spillway
volute siphon spillway

Discuss Question

Answer: Option C. -> saddle siphon spillway
Answer: (c).saddle siphon spillway

Question 63. Which of the following spillway is designed in India by Ganesh Iyer?

Saddle siphon spillway
Saddle spillway
Glory hole spillway
Volute Siphon spillway

Discuss Question

Answer: Option D. -> Volute Siphon spillway
Answer: (d).Volute Siphon spillway

Question 64. The formation of hydraulic jump at the foot of a spillway is one of the common methods of energy dissipation because ______________________

it destroys more than 90% of total energy by the turbulence produced in the jump
it reduces the kinetic energy by increasing the depth of flow
its action is not understood
it reduces the kinetic energy by decreasing the depth of flow

Discuss Question

Answer: Option A. -> it destroys more than 90% of total energy by the turbulence produced in the jump
Answer: (a).it destroys more than 90% of total energy by the turbulence produced in the jump

Question 65. A ski-jump bucket is also known as _____________________

flip bucket
solid roller bucket
slotted roller bucket
flexible bucket

Discuss Question

Answer: Option A. -> flip bucket
Answer: (a).flip bucket

Question 66. Which of the following stilling basin help in stabilizing the flow and improve the jump performance?

dentated sills
chute blocks
baffle piers
friction blocks

Discuss Question

Answer: Option B. -> chute blocks
Answer: (b).chute blocks

Question 67. What is the expected solution for the case when the T.W.C is lying above the J.H.C curve at all discharges?

By providing a simple concrete apron of length 5(Y₁ – Y₂)
By providing a sloping apron above the river bed
By providing a sloping apron below the river bed
Provision of a ski-jump bucket

Discuss Question

Answer: Option B. -> By providing a sloping apron above the river bed
Answer: (b).By providing a sloping apron above the river bed

Question 68. The percentage of energy dissipation in a hydraulic jump increases with the increase in the Froude number.

True
False
May be True or False
Can't say

Discuss Question

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

Question 69. When the Froude number is in the range of 2.5 to 4.5, the jump is ____________________

weak and energy loss is low
troublesome and oscillating
steady jump
strong jump

Discuss Question

Answer: Option B. -> troublesome and oscillating
Answer: (b).troublesome and oscillating

Question 70. Standard stilling basin is provided at the toe of a dam spillway for energy dissipation is usually provided with auxiliary devices like chute blocks and dentated sills for the basic purpose of reducing the length of the stilling basin from about ________________