Questions and answers for exam Preparation

MCQs

Total Questions : 153 | Page 11 of 16 pages

Question 101. The base width of a solid gravity dam is 35 m and the specific gravity of dam material is 2.45. What is the approximate allowable height of the dam having an elementary profile without considering the uplift?

64.68 m
54.80 m
164 m
80 m

Discuss Question

Answer: Option B. -> 54.80 m
Answer: (b).54.80 m

Question 102. A low gravity dam of elementary profile made up of concrete of relative density 2.57 and safe allowable stress of foundation material 4.2 MPa. What is the maximum height of the dam without considering the uplift force?

120 m
217 m
279 m
325 m

Discuss Question

Answer: Option A. -> 120 m
Answer: (a).120 m

Question 103. The small openings made in the huge body of a concrete gravity dam such as sluices and inspection galleries can be assumed to be causing only local effects without any appreciable effect on the distribution of stresses as per the principle of_____________________

Laplace
St. Venant
Reynold
St. Francis

Discuss Question

Answer: Option B. -> St. Venant
Answer: (b).St. Venant

Question 104. The vertical stress at the toe was found to be 3.44 MPa at the base of the gravity dam section. If the downstream face of the dam has a slope of 0.617 horizontal: 1 vertical, the maximum principal stress at the toe of the dam when there is no tailwater is _______________

1.7 MPa
2.4 MPa
3.6 MPa
4.8 MPa

Discuss Question

Answer: Option D. -> 4.8 MPa
Answer: (d).4.8 MPa

Question 105. What is the recommended value of shear friction factor against sliding?

More than unity
Less than unity
More than 3 to 5
Less than 3

Discuss Question

Answer: Option C. -> More than 3 to 5
Answer: (c).More than 3 to 5

Question 106. Transverse joints in concrete gravity dams are the ___________________________

horizontal construction joints at each lift height
vertical construction joints of full height and width
diagonal construction joints for torsion
longitudinal construction joints of full width

Discuss Question

Answer: Option B. -> vertical construction joints of full height and width
Answer: (b).vertical construction joints of full height and width

Question 107. Leakage through the transverse joints in a gravity dam is prevented by ____________

shear keys
keyways
water stops
galleries

Discuss Question

Answer: Option C. -> water stops
Answer: (c).water stops

Question 108. In order to reduce uplift on a gravity dam, the type of grouting done is ____________________

curtain grouting near the heel
consolidation grouting near the heel
curtain grouting near the toe
consolidation grouting near the toe

Discuss Question

Answer: Option A. -> curtain grouting near the heel
Answer: (a).curtain grouting near the heel

Question 109. The horizontal joints that extends through the entire width of the dam section and are developed at each lift height is called as ___________________