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MCQs

Total Questions : 3147 | Page 4 of 315 pages
Question 31. The most efficient section of a channel is
  1.    Triangular
  2.    Rectangular
  3.    Square
  4.    Trapezoidal
 Discuss Question
Answer: Option D. -> Trapezoidal
Question 32. Which type of the pump is different from others in the same group?
  1.    Screw pump
  2.    Gear pump
  3.    Cam and piston pump
  4.    Plunger pump
 Discuss Question
Answer: Option D. -> Plunger pump
Question 33. Cavitation will begin when
  1.    The pressure at any location reaches an absolute pressure equal to the saturated vapour pressure of the liquid
  2.    Pressure becomes more than critical pressure
  3.    Flow is increased
  4.    Pressure is increased
 Discuss Question
Answer: Option A. -> The pressure at any location reaches an absolute pressure equal to the saturated vapour pressure of the liquid
Question 34. The coefficient of discharge for an external mouthpiece is
  1.    0.375
  2.    0.5
  3.    0.707
  4.    0.855
 Discuss Question
Answer: Option D. -> 0.855
Question 35. The efficiency of a Pelton wheel working under constant head ________ with the increase in power.
  1.    Remain same
  2.    Increases
  3.    Decreases
  4.    None of these
 Discuss Question
Answer: Option B. -> Increases
Question 36. The intensity of pressure on an immersed surface __________ with the increase in depth.
  1.    Does not change
  2.    Increases
  3.    Decreases
  4.    None of these
 Discuss Question
Answer: Option B. -> Increases
Question 37. The static head of a centrifugal pump is equal to the _________ of suction head and delivery head.
  1.    Product
  2.    Difference
  3.    Sum
  4.    None of these
 Discuss Question
Answer: Option C. -> Sum
Question 38. A Piezometer tube is used only for measuring
  1.    Low pressure
  2.    High pressure
  3.    Moderate pressure
  4.    Vacuum pressure
 Discuss Question
Answer: Option C. -> Moderate pressure
Question 39. The discharge through a convergent mouthpiece is __________ the discharge through an internal mouthpiece of the same diameter and head of water.
  1.    Equal to
  2.    One-half
  3.    Three fourth
  4.    Double
 Discuss Question
Answer: Option D. -> Double
Question 40. According to Manning's formula, the discharge through an open channel is (where M = Manning's constant)
  1.    A × M × m1/2 × i2/3
  2.    A × M × m2/3 × i1/2
  3.    A1/2 × M2/3 × m × i
  4.    A2/3 × M1/3 × m × i
 Discuss Question
Answer: Option B. -> A × M × m2/3 × i1/2

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