Questions and answers for exam Preparation

MCQs

Total Questions : 88 | Page 5 of 9 pages

Question 41. An ungated spillway starts functioning as soon as the water level in the reservoir crosses the __________________

maximum reservoir level
minimum reservoir level
maximum conservation level
full Supply level

Discuss Question

Answer: Option C. -> maximum conservation level
Answer: (c).maximum conservation level

Question 42. Which of the following is the simplest type of spillway and may be constructed on small bunds or thin arch dams?

Straight drop spillway
Ogee spillway
Shaft spillway
Siphon spillway

Discuss Question

Answer: Option A. -> Straight drop spillway
Answer: (a).Straight drop spillway

Question 43. Which of the following is a secondary safety arrangement?

Safety valves
Spillway gates
Subsidiary spillway
Energy dissipaters

Discuss Question

Answer: Option C. -> Subsidiary spillway
Answer: (c).Subsidiary spillway

Question 44. Which of the following spillway is least suitable to earthen dams?

Ogee spillway
Chute spillway
Side-channel spillways
Shaft spillway

Discuss Question

Answer: Option A. -> Ogee spillway
Answer: (a).Ogee spillway

Question 45. In the functioning of an ogee spillway, the operating head ______________________

frequently exceeds the design head
rarely exceeds the design head
never exceeds the design head
has no connection with the design head

Discuss Question

Answer: Option B. -> rarely exceeds the design head
Answer: (b).rarely exceeds the design head

Question 46. If the operating head on an ogee spillway is more than the design head then ________________

the pressure on the crest will be zero
the pressure on the crest will be negative causing cavitation
the pressure on the crest will be positive
the discharge coefficient of the spillway will be reduced

Discuss Question

Answer: Option B. -> the pressure on the crest will be negative causing cavitation
Answer: (b).the pressure on the crest will be negative causing cavitation

Question 47. Which of the following spillway is an improvement over free overflow spillway?

Straight drop spillway
Open channel spillway
Overflow spillway
Siphon spillway

Discuss Question

Answer: Option C. -> Overflow spillway
Answer: (c).Overflow spillway

Question 48. If the head of the water over the spillway is less than the design head, then ________________

the pressure on the crest will be zero
the pressure on the crest will be negative causing cavitation
the discharge coefficient of the spillway is increased
the discharge coefficient of the spillway will be reduced

Discuss Question

Answer: Option D. -> the discharge coefficient of the spillway will be reduced
Answer: (d).the discharge coefficient of the spillway will be reduced

Question 49. The spillway which can be called as an overflow spillway is essentially ___________________

an ogee spillway
a shaft spillway
a chute spillway
a syphon spillway

Discuss Question

Answer: Option A. -> an ogee spillway
Answer: (a).an ogee spillway

Question 50. The W.E.S downstream profile of an ogee spillway can be represented by an equation:
Xⁿ = K Hdⁿ⁻¹. Y
Where x and y are the coordinates of the points on the crest profile and K and n for a vertical upstream spillway would respectively be___________________