Hydraulic Machines MCQs with answers Page - 18

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. Delivery head of a centrifugal pump is ?

  • (A) directly proportional to N
  • (B) inversely proportional to N
  • (C) directly proportional to N²
  • (D) inversely proportional to N²

A

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Q. The cavitation in a hydraulic machine is mainly due to ?

  • (A) low velocity
  • (B) high velocity
  • (C) low pressure
  • (D) high pressure

A

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Q. The maximum number of jets, generally, employed in an impulse turbine without jet interference are ?

  • (A) two
  • (B) four
  • (C) six
  • (D) eight

A

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Q. The specific speed of a centrifugal pump, delivering 750 litres of water per second against a head of 15 metres at 725 r.p.m., is ?

  • (A) 24.8 r.p.m.
  • (B) 48.2 r.p.m.
  • (C) 82.4 r.p.m.
  • (D) 248 r.p.m.

A

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Q. Which of the following pump is successfully used for lifting water from deep wells? ?

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

A

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Q. A turbine is required to develop 1500 kW at 300 r.p.m. under a head of 150 m. Which of the following turbine should be used ?

  • (A) Pelton wheel with one nozzle
  • (B) Pelton wheel with two or more nozzle
  • (C) Kaplan turbine
  • (D) Francis turbine

A

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Q. An impulse turbine is used for ?

  • (A) low head of water
  • (B) high head of water
  • (C) medium head of water
  • (D) high discharge

A

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Q. A Pelton wheel develops 1750 kW under a head of 100 metres while running at 200 r.p.m. and discharging 2500 litres of water per second. The unit power of the wheel is ?

  • (A) 0.25 kW
  • (B) 0.75 kW
  • (C) 1.75 kW
  • (D) 3.75 kW

A

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Q. Which of the following hydraulic unit is used for transmitting increased or decreased torque to the driven shaft ?

  • (A) Hydraulic ram
  • (B) Hydraulic intensifier
  • (C) Hydraulic torque converter
  • (D) Hydraulic accumulator

A

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Q. The width of the bucket for a Pelton wheel is generally .......... the diameter of jet. ?

  • (A) double
  • (B) three times
  • (C) four times
  • (D) five times

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