Questions and answers for exam Preparation

MCQs

Total Questions : 153 | Page 3 of 16 pages

Question 21. Provision of sufficient freeboard eliminates _______________
i. Over-topping failure
ii. Erosion of U/s face
iii. Erosion of D/s face
iv. Cracking due to frost action
v. Gully formation
Which of the following is/are correct?

i and v
ii and iii
iv and v
i and iv

Discuss Question

Answer: Option D. -> i and iv
Answer: (d).i and iv

Question 22. Sloughing is the process of _________________

progressive erosion
subsequent removal of soil grains from within the dam
uncontrolled seepage through the dam body
progressive removal of soil from the D/s face

Discuss Question

Answer: Option D. -> progressive removal of soil from the D/s face
Answer: (d).progressive removal of soil from the D/s face

Question 23. The collection and removal of water before it acquires high downward velocities is ensured by provision of ____________________

berms
freeboard
burrow pits
spoil banks

Discuss Question

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

Question 24. In order to prevent the possibility of the cross-flow towards the earthen embankments, it is necessary to provide _____________________

counter berms
sides walls of sufficient height and length
spoil banks
sufficient freeboard

Discuss Question

Answer: Option B. -> sides walls of sufficient height and length
Answer: (b).sides walls of sufficient height and length

Question 25. In foundation slide failure___________________________

top of embankment gets cracked and lower slope moves outward forming large mud waves near the heel
top of embankment gets cracked and lower slope moves inward forming large mud waves near the heel
bottom of embankment gets cracked and lower slope moves outward forming large mud waves near the heel
bottom of embankment gets cracked and lower slope moves inward forming large mud waves near the heel

Discuss Question

Answer: Option A. -> top of embankment gets cracked and lower slope moves outward forming large mud waves near the heel
Answer: (a).top of embankment gets cracked and lower slope moves outward forming large mud waves near the heel

Question 26. The only provision among the following which can help control the seepage through the body of an earthen dam and thus to keep the phreatic line well within the dam width is _________________

upstream impervious cut-off
drain trench along the downstream toe
relief wells
chimney drain

Discuss Question

Answer: Option D. -> chimney drain
Answer: (d).chimney drain

Question 27. What is provided in the form of a transition zone between the homogenous embankments-fill and rock toe?

Toe filter
Horizontal blanket
Chimney drain
Trenches

Discuss Question

Answer: Option A. -> Toe filter
Answer: (a).Toe filter

Question 28. The length of horizontal blanket should be equal to _________________

3 times the height of the dam
4 times the height of the dam
5 times the height of the dam
6 times the height of the dam

Discuss Question

Answer: Option A. -> 3 times the height of the dam
Answer: (a).3 times the height of the dam

Question 29. ____________________ is provided when large scale stratification occurs.

Chimney drain
Cut-off
Relief wells
Trenches

Discuss Question

Answer: Option A. -> Chimney drain
Answer: (a).Chimney drain

Question 30. During the maintenance of an earthen dam, the apparent seepage through the foundation of the dam is best taken care of by providing ______________________