Hydraulic Machines MCQs with answers Page - 19

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. A Francis turbine is used when the available head of water is ?

  • (A) 0 to 25 m
  • (B) 25 m to 250 m
  • (C) above 250 m
  • (D) none of these

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Q. If the net positive suction head (NPSH) requirement for the pump is not satisfied, then ?

  • (A) no flow will take place
  • (B) cavitation will be formed
  • (C) efficiency will be low
  • (D) excessive power will be consumed

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Q. Which type of the pump is different from others in the same group ?

  • (A) Screw pump
  • (B) Gear pump
  • (C) Cam and piston pump
  • (D) Plunger pump

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Q. A hydraulic coupling belongs to the category of ?

  • (A) power absorbing machines
  • (B) power developing machines
  • (C) energy transfer machines
  • (D) energy generating machines

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

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

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Q. Which of the following pump is preferred for flood control and irrigation applications ?

  • (A) Centrifugal pump
  • (B) Axial flow pump
  • (C) Mixed flow pump
  • (D) Reciprocating pump

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Q. Slip of a reciprocating pump is negative, when ?

  • (A) suction pipe is short and pump is running at low speeds
  • (B) delivery pipe is long and pump is running at high speeds
  • (C) suction pipe is short and delivery pipe is long and the pump is running at low speeds
  • (D) suction pipe is long and delivery pipe is short and the pump is running at high speeds

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Q. The specific speed of a hydraulic turbine depends upon ?

  • (A) speed and power developed
  • (B) discharge and power developed
  • (C) speed and head of water
  • (D) speed, power developed and head of water

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Q. In a Francis turbine runner, the number of blades are generally between ?

  • (A) 2 to 4
  • (B) 4 to 8
  • (C) 8 to 16
  • (D) 16 to 24

A

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Q. The function of guide vanes in a reaction turbine is to ?

  • (A) allow the water to enter the runner without shock
  • (B) allow the water to flow over them, without forming eddies
  • (C) allow the required quantity of water to enter the turbine
  • (D) all of the above

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