Fluid Mechanics MCQs with answers Page - 15

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Admin • 833.24K Points
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Q. Which of the following has the minimum compressibility?

  • (A) Nitrogen at room temperature
  • (B) Oxygen at room temperature
  • (C) Air at room temperature
  • (D) Water at room temperature

A

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Q. Cd for the orifice plate varies from

  • (A) 0.58 to 0.8
  • (B) 0.93 to 0.98
  • (C) 0.2 to 0.3
  • (D) 0.02 to 0.03

A

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Q. Friction factor for a hydraulically smooth pipe at NRe = 2100 is f1. If the pipe is further smoothened (i.e., roughness is reduced), the friction factor at the same value of NRe, will

  • (A) Increase
  • (B) Decrease
  • (C) Remain unchanged
  • (D) Increase or decrease depending on the pipe material

A

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Q. Two piping system are said to be equivalent, when the __________ are same.

  • (A) Fluid flow rate & friction loss
  • (B) Length & friction factor
  • (C) Diameter & friction factor
  • (D) Length & diameter

A

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Q. The pressure at a point in a fluid is not the same in all directions, when the fluid is viscous and

  • (A) Moving
  • (B) Static
  • (C) Cold
  • (D) Hot

A

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Q. In fluid flow, the stagnation point is defined as a point, where the __________ is zero.

  • (A) Flow velocity
  • (B) Pressure
  • (C) Total energy
  • (D) All of the above

A

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Q. A bed consists of particles of density 2000 kg/m3. If the height of the bed is 1.5 metres and its porosity 0.6, the pressure drop required to fluidise the bed by air is

  • (A) 25.61 kPa
  • (B) 11.77 kPa
  • (C) 14.86 kPa
  • (D) 21.13 kPa

A

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Q. Which of the following is most prone to pulsating discharge flow ?

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

A

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Q. Fanning friction factor equation applies to the __________ fluid flow.

  • (A) Non-isothermal condition of
  • (B) Compressible
  • (C) Both A and B
  • (D) Neither A nor B

A

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Q. Most commonly used joint in the underground pipe lines is the

  • (A) Sleevejoint
  • (B) Coupling
  • (C) Flange
  • (D) Expansion joint

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