E-PolyLearning

1. The safety valve of a dam is its __________________
a. drainage gallery
b. inspection gallery
c. spillway
d. outlet sluices
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Answer: (c).spillway

2. An ungated spillway starts functioning as soon as the water level in the reservoir crosses the __________________
a. maximum reservoir level
b. minimum reservoir level
c. maximum conservation level
d. full Supply level
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Answer: (c).maximum conservation level

3. Which of the following is the simplest type of spillway and may be constructed on small bunds or thin arch dams?
a. Straight drop spillway
b. Ogee spillway
c. Shaft spillway
d. Siphon spillway
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Answer: (a).Straight drop spillway

4. The spillway can be best built independently of the dam when there is _________________________
a. deep narrow gorge with steep slopes
b. deep narrow gorge with gradual slopes
c. wide gorge with a gradual slope
d. wide valley with moderate slopes
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Answer: (a).deep narrow gorge with steep slopes

5. Which of the following is a secondary safety arrangement?
a. Safety valves
b. Spillway gates
c. Subsidiary spillway
d. Energy dissipaters
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Answer: (c).Subsidiary spillway

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