Fluid Mechanics MCQs with answers Page - 10

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. A pressure of 25 m of head of water is equal to

  • (A) 25 kN/m2
  • (B) 245 kN/m2
  • (C) 2500 kN/m2
  • (D) 2.5kN/m2

A

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Q. A ship whose hull length is 100 m is to travel at 10 m/sec. For dynamic similarity, at what velocity should a 1:25 model be towed through water ?

  • (A) 10 m/sec
  • (B) 25 m/sec
  • (C) 2 m/sec
  • (D) 50 m/sec

A

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Q. Separation of flow occurs when

  • (A) the pressure intensity reaches a minimum
  • (B) the cross-section of a channel is reduced
  • (C) the boundary layer comes to rest
  • (D) all of the above

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Q. Two dimensional flow occurs when

  • (A) the direction and magnitude of the velocity at all points are identical
  • (B) the velocity of successive fluid par-ticles, at any point, is the same at successive periods of time
  • (C) the magnitude and direction of the velocity do not change from point to point in the fluid
  • (D) the fluid particles move in plane or parallel planes and the streamline pat-terns are identical in each plane

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Q. Uniform flow occurs when

  • (A) the flow is steady
  • (B) the flow is streamline
  • (C) size and shape of the cross section in a particular length remain constant
  • (D) size and cross section change uniformly along length

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Q. Surface tension has the units of

  • (A) newtons/m2
  • (B) newtons/cm
  • (C) newtons/m
  • (D) newtons

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Q. The horse power transmitted through a pipe is maximum when the ratio of loss of head due to friction and total head supplied is

  • (A) 1/3
  • (B) 1/4
  • (C) 1/2
  • (D) 2/3

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Q. Foot valves are provided in the suction line of a centrifugal pump to

  • (A) Avoid priming, every time we start the pump
  • (B) Remove the contaminant present in the liquid
  • (C) Minimise the fluctuation in discharge
  • (D) Control the liquid discharge

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Q. Pumping of a corrosive liquid is generally preferred to be done by a __________ pump, as it can be made of a variety of materials including plastics.

  • (A) Piston
  • (B) Positive displacement
  • (C) Sump
  • (D) Gear

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Q. Lower BWG means __________ of the tube.

  • (A) Lower thickness
  • (B) Lower cross-section
  • (C) Outer diameter
  • (D) Inner diameter

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