Questions and answers for exam Preparation

MCQs

Total Questions : 47 | Page 3 of 5 pages

Question 21. The maximum permissible reduction in the waterway from Lacey’s perimeter is _______

Discuss Question

Answer: Option B. -> 20%
Answer: (b).20%

Question 22. The permissible velocity through the barrels is generally limited to _____________

1.5 to 2 m/sec
2 to 3 m/sec
2.5 to 3 m/sec
1 to 2 m/sec

Discuss Question

Answer: Option B. -> 2 to 3 m/sec
Answer: (b).2 to 3 m/sec

Question 23. To reduce the cost of the CD works we resort to _____

fluming
blocking of drain
cut-off
lifting of canal water

Discuss Question

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

Question 24. Which of the following method is applicable for the design of channel transition when the water depths of the flumed and unflumed section are the same or maybe different?

Mitra’s method of design of transitions
Chaturvedi’s method of design of transitions
Hind’s method of design of transitions
The general method of design of transitions

Discuss Question

Answer: Option C. -> Hind’s method of design of transitions
Answer: (c).Hind’s method of design of transitions

Question 25. In a siphon aqueduct, the worst condition of uplift on the floor occurs when ________

the canal is full and the drainage empty with the water table at drainage bed
the canal and drainage are flowing full
the canal is empty and the drainage full with the water table at drainage bed
the canal is full and the drainage empty with water table below the floor

Discuss Question

Answer: Option C. -> the canal is empty and the drainage full with the water table at drainage bed
Answer: (c).the canal is empty and the drainage full with the water table at drainage bed

Question 26. The greater is the fluming, the greater is the length of upstream and downstream transition wings.

True
False
May be True or False
Can't say

Discuss Question

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

Question 27. The floor of a siphon aqueduct needs to be designed for conditions when?
i. The canal and drainage are flowing full
ii. The canal is full and there is no drainage discharge
iii. The canal is empty and drainage discharge is full

i only
ii only
i and ii
ii and iii

Discuss Question

Answer: Option D. -> ii and iii
Answer: (d).ii and iii

Question 28. The head loss through a siphon barrel is usually given by Unwin’s formula by neglecting velocity of approach as HL = [1 + F₁ + F₂. L/R] V²/2g, where F₁ and F₂ respectively represent the coefficient of head losses due to?

Barrel friction and entry
Entry and barrel friction
Barrel friction and exit
Exit and barrel friction

Discuss Question

Answer: Option B. -> Entry and barrel friction
Answer: (b).Entry and barrel friction

Question 29. Which of the following wings protect the earthen slopes of the canal and also guide the drainage water?

Canal wings
Land wings
River wings
Side wings

Discuss Question

Answer: Option C. -> River wings
Answer: (c).River wings

Question 30. A siphon aqueduct is constructed at a canal crossing site where drainage HFL was 212.2 m by allowing an afflux of 0.4 m at high flood discharge. At this site, the water level downstream of the crossing at the same high flood will be _________