Questions and answers for exam Preparation

MCQs

Total Questions : 153 | Page 14 of 16 pages

Question 131. According to Terzaghi, the ratio of D₁₅ of filter to D₁₅ of base material should be _____________

> 5
< 4
4 to 5
< 5

Discuss Question

Answer: Option C. -> 4 to 5
Answer: (c).4 to 5

Question 132. The base width of a rock-fill dam in comparison to that of an earthen dam is _______________

much larger
much smaller
sometimes large sometimes smaller
almost equal

Discuss Question

Answer: Option B. -> much smaller
Answer: (b).much smaller

Question 133. Which of the following is not provided in order to control the possibility of sand boiling?

Relief wells
Drain trenches
Vertical cut-offs
Berms

Discuss Question

Answer: Option C. -> Vertical cut-offs
Answer: (c).Vertical cut-offs

Question 134. On moderate foundations and particularly in seismic areas, the type of dam which can preferably be considered for construction is ___________________

masonry gravity dam
earthen dam
rock-fill dam
arch dam

Discuss Question

Answer: Option C. -> rock-fill dam
Answer: (c).rock-fill dam

Question 135. The seepage forces within the filter are controlled up to permissible small magnitudes when the ratio of D₁₅ of filter to D₁₅ of base material is ___________________

between 5 to 40
less than 5
between 5 to 20
less than 4

Discuss Question

Answer: Option A. -> between 5 to 40
Answer: (a).between 5 to 40

Question 136. The type of arch dam which generally requires overhangs at abutments is of ________________________

constant radius type
variable radius type
constant angle type
variable angle type

Discuss Question

Answer: Option C. -> constant angle type
Answer: (c).constant angle type

Question 137. Which of the following theory is the most accurate method to design arch?

The thin cylinder theory
The theory of elastic arches
The trial load method
Creep theory

Discuss Question

Answer: Option C. -> The trial load method
Answer: (c).The trial load method

Question 138. The thin cylinder theory for designing arch dams is based only on ___________________

temperature stresses
ice pressures
yield stresses
hydrostatic water pressure

Discuss Question

Answer: Option D. -> hydrostatic water pressure
Answer: (d).hydrostatic water pressure

Question 139. Which among the following is not an assumption of the ‘Trial Load Analysis’ method of design of arch dams?

Plane sections normal to the axis remain plane after flexure
Any horizontal arch ring is independent of the arch rings below and above
Modulus of elasticity of concrete and rock foundation is equal for compression and tension
Stresses are proportional to strains

Discuss Question

Answer: Option B. -> Any horizontal arch ring is independent of the arch rings below and above
Answer: (b).Any horizontal arch ring is independent of the arch rings below and above

Question 140. Which of the following forces is the least important in the design of arch dams?