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MCQs

Total Questions : 59 | Page 2 of 6 pages
Question 11. What is the range of value of Manning’s coefficient for straight alignment for cast in-situ concrete lining?
  1.    0.012 – 0.015
  2.    0.015 – 0.018
  3.    0.018 – 0.020
  4.    0.020 – 0.025
 Discuss Question
Answer: Option B. -> 0.015 – 0.018
Answer: (b).0.015 – 0.018
Question 12. A lined canal costs about 2 to 2.5 times as much as the unlined canal.
  1.    True
  2.    False
  3.    May be True or False
  4.    Can't say
 Discuss Question
Answer: Option A. -> True
Answer: (a).True
Question 13. Which of the following is not an advantage of the lining of the canal?
  1.    Seepage control
  2.    Prevention of water-logging
  3.    Increase in channel capacity
  4.    Increased maintenance costs
 Discuss Question
Answer: Option D. -> Increased maintenance costs
Answer: (d).Increased maintenance costs
Question 14. The capacity of the channel is a function of velocity.
  1.    True
  2.    False
  3.    May be True or False
  4.    Can't say
 Discuss Question
Answer: Option A. -> True
Answer: (a).True
Question 15. What is the minimum value of free-board for Main and Branch Lined canals if the discharge is more than 10 cumecs as per specified by BIS code?
  1.    0.60
  2.    0.50
  3.    0.75
  4.    0.30
 Discuss Question
Answer: Option C. -> 0.75
Answer: (c).0.75
Question 16. Calculate hydraulic mean depth for concrete-lined channel to carry a discharge of 350 cumecs at a slope of 1 in 5000. The value of manning’s constant for the lining is 0.015. The side slopes of a channel may be taken as 1.5:1. Assume limiting velocity in the channel as 2m/sec.
  1.    2.20 m
  2.    2.40 m
  3.    2.60 m
  4.    2.80 m
 Discuss Question
Answer: Option D. -> 2.80 m
Answer: (d).2.80 m
Question 17. The distance measured above the F.S.L and to the top of the lining is known as free-board.
  1.    True
  2.    False
  3.    May be True or False
  4.    Can't say
 Discuss Question
Answer: Option A. -> True
Answer: (a).True
Question 18. When the concrete lining is not reinforced in a channel, velocities up to 2.5 m/sec are permitted.
  1.    True
  2.    False
  3.    May be True or False
  4.    Can't say
 Discuss Question
Answer: Option A. -> True
Answer: (a).True
Question 19. What is the minimum value of inspection bank width recommended by Indian Standards if the discharge is more than 30 cumecs?
  1.    8.0
  2.    5.0
  3.    6.0
  4.    7.0
 Discuss Question
Answer: Option A. -> 8.0
Answer: (a).8.0
Question 20. Calculate the central depth of a triangular channel section to carry a discharge of 15 cumecs. Consider the available slope as 1 in 9000. Assume the side slopes of the channel be 1.25:1 and manning’s constant is 0.015 for good brick work in lining.
  1.    2.94 m
  2.    3.14 m
  3.    2.25 m
  4.    2.77 m
 Discuss Question
Answer: Option A. -> 2.94 m
Answer: (a).2.94 m

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