Questions and answers for exam Preparation

MCQs

Total Questions : 50 | Page 3 of 5 pages

Question 21. The phenomenon of sediment transport increases maintenance work and sometimes leads to huge economic loss.

True
False
May be True or False
Can't say

Discuss Question

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

Question 22. The basic mechanism behind the phenomenon of sediment transport is ______________

drag force opposite to the direction of the flow
drag force in the direction of the flow
free motion of the sediment particles
force exerted by water vertically

Discuss Question

Answer: Option B. -> drag force in the direction of the flow
Answer: (b).drag force in the direction of the flow

Question 23. BEAST Stands for _______________

Benthic Environmental Assessment Sediment Tool
Benthic Environmental Achievement Sediment Tool
Benthic Environment Achievement Sediment Task
Benthic Erosion Assessment Sediment tool

Discuss Question

Answer: Option A. -> Benthic Environmental Assessment Sediment Tool
Answer: (a).Benthic Environmental Assessment Sediment Tool

Question 24. Which of the following statement is wrong?

The design and execution of flood control scheme is chiefly governed by the peak flood levels
Silting of reservoirs and rivers is an important aspect of sediment control
The storage capacity of the reservoir is reduced by its silting
Natural rivers used for navigation rarely gets silted up posing no cost issues

Discuss Question

Answer: Option D. -> Natural rivers used for navigation rarely gets silted up posing no cost issues
Answer: (d).Natural rivers used for navigation rarely gets silted up posing no cost issues

Question 25. The soil is assumed to be coherent in the study of the mechanism of sediment transport.

True
False
May be True or False
Can't say

Discuss Question

Answer: Option B. -> False
Answer: (b).False

Question 26. For the bed of the canal, the average shear stress is equal to the tractive force per unit area.

True
False
May be True or False
Can't say

Discuss Question

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

Question 27. Which of the following statement is wrong?

Threshold condition is the one in which a few particles on the bed will just start moving
Knowledge of critical velocity helps in designing stable non-scouring channels
The critical tractive force approach helps in designing unstable channels in alluviums
The knowledge of threshold condition is required for the computation of sediment load

Discuss Question

Answer: Option C. -> The critical tractive force approach helps in designing unstable channels in alluviums
Answer: (c).The critical tractive force approach helps in designing unstable channels in alluviums

Question 28. A wide unlined channel carrying silt-free water has a depth of 2.0 m. The maximum slope that can be given to a channel is 1 in 10,000. Calculate the maximum tractive stress permissible on the bed to prevent scouring.

0.2 kg/m²
1.962 kg/m²
2 kg/m²
1 kg/cm²

Discuss Question

Answer: Option A. -> 0.2 kg/m²
Answer: (a).0.2 kg/m²

Question 29. The water flows at a depth of 0.6 m in a wide stream having a bed slope of 1 in 2500. The critical tractive stress is 0.53 N/m². Determine the motion of soil grains and the average shear stress.