Fluid Mechanics MCQs with answers Page - 13

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Admin • 833.24K Points
Coach

Q. Viscosity of a liquid decreases __________ with rise in temperature.

  • (A) Exponentially
  • (B) Linearly
  • (C) Logarithmically
  • (D) None of these

A

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Q. In isotropic turbulence, the __________ are equal to each other.

  • (A) Temporal velocity components
  • (B) Mean square of velocity fluctuations in the three co-ordinate directions
  • (C) Root mean square of velocity fluctuations in the three co-ordinate directions
  • (D) None of these

A

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Q. If in a flow field, between any two points, then the flow must be

  • (A) Steady, incompressible, irrotational
  • (B) Steady, compressible, irrotational
  • (C) Steady, compressible and along a streamline
  • (D) Unsteady, incompressible, irrotational

A

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Q. Which of the following factors does not contribute to the pressure drop in a pipeline ?

  • (A) Velocity of fluid
  • (B) Size of pipe
  • (C) Length of pipe and number of bends
  • (D) None of these

A

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Q. A piezometer provided in the pipe measures

  • (A) Friction factor
  • (B) Static pressure
  • (C) Dynamic pressure
  • (D) None of these

A

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Q. Air vessel of a reciprocating pump is initially filled with

  • (A) Atmospheric air
  • (B) Compressed air
  • (C) Water
  • (D) None of these

A

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Q. The hydraulic diameter of an annulus of inner and outer radii Ri and Ro respectively is

  • (A) Ro - Ri
  • (B) 2(Ro - Ri)
  • (C) 4(Ro - Ri)
  • (D) 8(Ro - Ri)

A

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Q. Sewage sludge is __________ type of non-Newtonion fluid.

  • (A) Dilatant
  • (B) Bingham plastic
  • (C) Pseudo plastic
  • (D) None of these

A

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Q. __________ pumps are axial flow pumps.

  • (A) Turbine
  • (B) Propeller
  • (C) Diffuser
  • (D) None of these

A

Admin • 833.24K Points
Coach

Q. Horsepower increase of a centrifugal gas compressor without altering the volumetric flow rate will __________ the gas discharge pressure.

  • (A) Increase
  • (B) Decrease
  • (C) Not change
  • (D) Exponentially decrease

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