Hydraulic Machines MCQs with answers Page - 16

Here, you will find a collection of MCQ questions on Hydraulic Machines. Go through these questions to enhance your preparation for upcoming examinations and interviews.

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Q. The hydraulic efficiency of an impulse turbine is maximum when velocity of wheel is

  • (A) one-fourth
  • (B) one-half
  • (C) three-fourth
  • (D) double

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Q. Which of the following turbine is preferred for 0 to 25 m head of water ?

  • (A) Pelton wheel
  • (B) Kaplan turbine
  • (C) Francis turbine
  • (D) none of these

A

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Q. Dynamic similarity is said to exist between the model and the prototype, if both of them ?

  • (A) have identical velocities
  • (B) are equal in size and shape
  • (C) are identical in shape, but differ only in size
  • (D) none of the above

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Q. The ratio of quantity of liquid discharged per second from the pump to the quantity of liquid passing per second through the impeller is known as ?

  • (A) manometric efficiency
  • (B) mechanical efficiency
  • (C) overall efficiency
  • (D) volumetric efficiency

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Q. Which of the following pump is generally used to pump highly viscous fluid ?

  • (A) Centrifugal pump
  • (B) Reciprocating pump
  • (C) Air lift pump
  • (D) Screw pump

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Q. In the above question, the saving in case of a double acting reciprocating pump is ?

  • (A) 39.2 %
  • (B) 48.8 %
  • (C) 84.8 %
  • (D) 88.4 %

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Q. Which of the following pump is successfully used for lifting water to the boilers ?

  • (A) Centrifugal pump
  • (B) Reciprocating pump
  • (C) Jet pump
  • (D) Air-lift pump

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Q. Kinematic similarity is said to exist between the model and the prototype, if both of them ?

  • (A) have identical velocities
  • (B) are equal in size and shape
  • (C) are identical in shape, but differ only in size
  • (D) have identical forces

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Q. For centrifugal pump impeller, the maximum value of the vane exit angle is ?

  • (A) 10° to 15°
  • (B) 15° to 20°
  • (C) 20° to 25°
  • (D) 25° to 30°

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Q. The maximum hydraulic efficiency of an impulse turbine is ?

  • (A) (1 + cos ?) / 2
  • (B) (1 - cos ?) / 2
  • (C) (1 + sin ?) / 2
  • (D) (1 - sin ?) / 2

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