Fluid Mechanics MCQs with answers Page - 9

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

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Q. Metacentric height is given as the distance between

  • (A) the center of gravity of the body andthe meta center
  • (B) the center of gravity of the body and the center of buoyancy
  • (C) the center of gravity of the body and the center of pressure
  • (D) center of buoyancy and metacentre

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Q. The theoretical value of coefficient of contraction of a sharp edged orifice is

  • (A) 0.611
  • (B) 0.85
  • (C) 0.98
  • (D) 1.00

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Q. The discharge of a liquid of kinematic viscosity 4 cm2/sec through a 8 cm dia-meter pipe is 3200π cm2/sec. The type of flow expected is

  • (A) laminar flow
  • (B) transition flow
  • (C) turbulent flow
  • (D) not predictable from the given data

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Q. A model of torpedo is tested in a towing tank at a velocity of 25 m/sec. The prototype is expected to attain a velocity of 5 m/sec. What model scale has been used?

  • (A) 1 : 5
  • (B) 1 : 2.5
  • (C) 1 :25
  • (D) 1 : 53/2

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Q. A one dimensional flow is one which

  • (A) is uniform flow
  • (B) is steady uniform flow
  • (C) takes place in straight lines
  • (D) involves zero transverse component of flow

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Q. A perfect gas

  • (A) has constant viscosity
  • (B) has zero viscosity
  • (C) is in compressible
  • (D) None of these

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Q. A piece of metal of specific gravity 13.6 is placed in mercury of specific gravity 13.6, what fraction of it volume is under mercury?

  • (A) the metal piece will simply float over the mercury
  • (B) the metal piece will be immersed in mercury by half
  • (C) whole of the metal piece will be immersed with its top surface just at mercury level
  • (D) metal piece will sink to the bottom

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Q. A piece of metal of specific gravity 7 floats in mercury of specific gravity 13.6. What fraction of its volume is under mercury ?

  • (A) 0.5
  • (B) 0.4
  • (C) 0.515
  • (D) 0.5

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Q. A piece of wood having weight 5 kg floats in water with 60% of its volume under the liquid. The specific gravity of wood is

  • (A) 0.83
  • (B) 0.6
  • (C) 0.4
  • (D) 0.3

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Q. A piece weighing 3 kg in air was found to weigh 2.5 kg when submerged in water. Its specific gravity is

  • (A) 1
  • (B) 5
  • (C) 7
  • (D) 6

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