Questions and answers for exam Preparation

MCQs

Total Questions : 96 | Page 8 of 10 pages

Question 71. What is laplacian equation?

d²φ / dx² + d²Φ/dz²
d²Φ / dx² + d²Φ/dz²
dΦ / dx + d²Φ/dy²
d²φ / dx² + d²Φ/dz

Discuss Question

Answer: Option B. -> d²Φ / dx² + d²Φ/dz²
Answer: (b).d²Φ / dx² + d²Φ/dz²

Question 72. The component of which force is to be counterbalanced so that the soil grains remain stable?

Upthrust Pressure Forces
Forces due to Velocity Components
Pressure Force
Seepage Water Force

Discuss Question

Answer: Option D. -> Seepage Water Force
Answer: (d).Seepage Water Force

Question 73. What is the name of the gradient pressure at the exit end?

Gradient of Pressure
Exit Gradient
Streamline Gradient
Equipotential Gradient

Discuss Question

Answer: Option B. -> Exit Gradient
Answer: (b).Exit Gradient

Question 74. What type of points is needed to be joined to form an equipotential line?

Equal Pressure Points
Residual Heads which still need Energy Dissipation
Velocity Gradient Points
Points of intersection of Streamlines and Velocity Components

Discuss Question

Answer: Option B. -> Residual Heads which still need Energy Dissipation
Answer: (b).Residual Heads which still need Energy Dissipation

Question 75. Which method is evolved by khosla for designing of hydraulic structures?

Method of Gradients
Method of Variables
Method of Independent Variables
Method of Flow Nets

Discuss Question

Answer: Option C. -> Method of Independent Variables
Answer: (c).Method of Independent Variables

Question 76. The width provided at the site for the river to flow and also the length of the weir is ____________

waterway
launching apron
top width
bed mean width

Discuss Question

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

Question 77. By increasing the length of the floor on the upstream of the weir axis?

the uplift pressure will increase below the floor downstream of the weir
the uplift pressure will decrease below the floor downstream of the weir
the uplift pressure will remain the same in both cases
the uplift pressure may increase or decrease

Discuss Question

Answer: Option B. -> the uplift pressure will decrease below the floor downstream of the weir
Answer: (b).the uplift pressure will decrease below the floor downstream of the weir

Question 78. Calculate the top width of the weir wall (B’) if the head of the water over the weir wall at the time of the maximum flood is 2 m. Take the specific gravity of the floor material as 2.4.

1.7 m
2 m
2.4 m
1.3 m

Discuss Question

Answer: Option A. -> 1.7 m
Answer: (a).1.7 m

Question 79. Calculate the length of upstream talus if the length of the downstream loose stone talus is 20 m.

20 m
10 m
40 m
15 m

Discuss Question

Answer: Option B. -> 10 m
Answer: (b).10 m

Question 80. Calculate the length of the downstream floor for a vertical drop weir having crest shutters, if the total maximum head loss is 2.5 m. Assume the value of Bligh’s constant as 12.