Fluid Mechanics MCQs with answers Page - 7

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Admin • 833.24K Points
Coach

Q. Liquid delivery by centrifugal pump starts, only when the head developed by it is equal to the __________ head.

  • (A) Manometric
  • (B) Total
  • (C) Static
  • (D) Friction

A

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Q. The Mach number for hypersonic flow of compressible fluid is

  • (A) 1
  • (B) > 1
  • (C) > 4
  • (D) < 2

A

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Q. Which of the following is used for very accurate measurement of flow of gas at low velocity?

  • (A) Pitot tube
  • (B) Rotameter
  • (C) Segmental orificemeter
  • (D) Hot wire annemometer

A

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Q. For laminar flow through a closed conduit

  • (A) Vmax = 2Vav
  • (B) Vmax = Vav
  • (C) Vmax = 1.5Vav
  • (D) Vmax = 0.5Vav

A

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Q. The fluid in which the shearing stress within it is proportional to the velocity gradient across the sheared section, is called a __________ fluid.

  • (A) Bingham
  • (B) Newtonion
  • (C) Perfect
  • (D) None of these

A

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Q. The distance between metacentre and __________ is called metacentric height.

  • (A) Water surface
  • (B) Centre of gravity
  • (C) Centre of buoyancy
  • (D) None of these

A

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Q. The __________ pressure is measured by a static tube.

  • (A) Static
  • (B) Dynamic
  • (C) Total
  • (D) None of these

A

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Q. Boiler feed water pump is usually a __________ pump.

  • (A) Reciprocating
  • (B) Gear
  • (C) Multistage centrifugal
  • (D) Diaphragm

A

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Q. A model of a reservior is drained in 4 mts by opening the sluice gate. The model scale is 1: 225. How long should it take to empty the prototype ?

  • (A) 900 minutes
  • (B) 4 minutes
  • (C) 4 x 2253/2 minutes
  • (D) 4 x 2251/2 minutes

A

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Q. In a two dimensional incompressible steady flow around an airfoil, the stream lines are 2 cm apart at a great distance from the airfoil, where the velocity is 30 m/sec. The velocity near the airfoil, where the stream lines are 1.5 cm apart, is

  • (A) 22.5 m/sec.
  • (B) 33 m/sec.
  • (C) 40 m/sec.
  • (D) 90 m/sec.

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