STUDY LESSON:-61 [CIVIL ENGINEERING]
For Competitive exams/Govt. jobs/Semester exam/Self Study Purpose
1. The effect of back water at weir is called
a) Retrogression b) afflux c) back water curve d) none of them
2. The breast wall is generally provided
a) In the weir section b) in the under sluice section c) in the main canal section d) in the head regulator section
3. The hydraulic jump involves
a) Super critical flow b) sub critical flow c) critical flow d) all of the above
4. Tensile stress developed in a concrete gravity dam are generally not considered because it will fail due to
a) Excessive seepage b) Excessive tensile stresses c) excessive compressive stresses d) none of the above
5. When the valley is steep of river mostly ____________ dam is suitable
a) Gravity Dam b) Earthen Dam c) Rock fill Dam d) none of these
6. Hydro-static pressure is more at the ___________ of the level
a) Top b) Base c) Side d) toe
7. Unit weight of the concrete is considered to be
a) 24kN/m3 b) 24kN/m2 c) 24N/m3 d) none of these
8. The margin between the maximum reservoir level and the top of the dam is known as ____________
a) High flood level b) Free board c) Maximum top level d) none of these
9. Homogeneous Embankment earthen dam is suitable for height upyo the
a) 10m b) 20m c) 40m d) none of the above
10. ____________ contact with the ground on the upstream side of the Gravity Dam.
a) Toe b) Heel c) spillway d) sluice way
Answer key-
1. b) afflux
2. d) in the head regulator section
3. d) all of the above
4. c) excessive compressive stresses
5. a) Gravity Dam
6. b) Base
7. a) 24kN/m3
8. b) free board
9. a) 10m
10. b) Heel
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