Cross Drainage Work Design MCQ

Test your knowledge with important Cross Drainage Work Design MCQ and their applications. These MCQs are beneficial for competitive exams too. Explore 30 + more Cross Drainage Work Design MCQs at Bissoy

• Calculate the value of hydraulic mean radius for a channel designed by Lacey’s theory which has a mean velocity of 1m/sec. The silt factor can be taken as unity.
  ক

  1 m

  খ

  0.5 m

  গ

  2 m

  ঘ

  2.5 m
• Calculate the depth of cut-off for scour holes for an irrigation channel of F.S.Q equal to 354 cumecs and H.F.Q of natural drainage equal to 600 cumecs. Assume the value of friction factor as 1.
  ক

  7 m

  খ

  7.5 m

  গ

  10.5 m

  ঘ

  8 m
• 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 _________
  ক

  212.2 m

  খ

  212.6 m

  গ

  211.8 m

  ঘ

  It cannot be predicted
• 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
  ক

  i only

  খ

  ii only

  গ

  i and ii

  ঘ

  ii and iii
• The head loss through a siphon barrel is usually given by Unwin’s formula by neglecting velocity of approach as HL = V2/2g, where F1 and F2 respectively represent the coefficient of head losses due to?
  ক

  V2/2g, where F1 and F2 respectively represent the coefficient of head losses due to? ] Barrel friction and entry

  খ

  1 + F1 + F2. L/R

  গ

  1 + F1 + F2. L/R

  ঘ

  1 + F1 + F2. L/R
• Which of the following wings protect the earthen slopes of the canal and also guide the drainage water?
  ক

  Canal wings

  খ

  Land wings

  গ

  River wings

  ঘ

  Side wings
• The greater is the fluming, the greater is the length of upstream and downstream transition wings.
  ক

  True

  খ

  False
• To reduce the cost of the CD works we resort to _____
  ক

  fluming

  খ

  blocking of drain

  গ

  cut-off

  ঘ

  lifting of canal water
• In a siphon aqueduct, the worst condition of uplift on the floor occurs when ________
  ক

  the canal is full and the drainage empty with the water table at drainage bed

  খ

  the canal and drainage are flowing full

  গ

  the canal is empty and the drainage full with the water table at drainage bed

  ঘ

  the canal is full and the drainage empty with water table below the floor
• 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?
  ক

  Mitra’s method of design of transitions

  খ

  Chaturvedi’s method of design of transitions

  গ

  Hind’s method of design of transitions

  ঘ

  The general method of design of transitions
• The permissible velocity through the barrels is generally limited to _____________
  ক

  1.5 to 2 m/sec

  খ

  2 to 3 m/sec

  গ

  2.5 to 3 m/sec

  ঘ

  1 to 2 m/sec
• The maximum permissible reduction in the waterway from Lacey’s perimeter is _______
  ক

  15%

  খ

  20%

  গ

  25%

  ঘ

  30%
• What is Lacey’s equation for fixing the approximate value of the required waterway for the drain?
  ক

  P = 4.75 Q

  খ

  P = 4.57 Q

  গ

  P = 4.75 Q1/2

  ঘ

  P = 4.57 Q1/2