Fluid Mechanics MCQs | Page - 2

Dear candidates you will find MCQ questions of Fluid Mechanics here. Learn these questions and prepare yourself for coming examinations and interviews. You can check the right answer of any question by clicking on any option or by clicking view answer button.

πŸ“Š Fluid Mechanics
Q. Velocity of liquid hydrocarbon fuels in a pipeline can not be measured by magnetic flowmeters, because their __________ is very low/small.
  • (A) Electrical resistivity
  • (B) Specific gravity
  • (C) Electrical conductivity
  • (D) Thermal conductivity
πŸ’¬ Discuss
βœ… Correct Answer: (C) Electrical conductivity
πŸ“Š Fluid Mechanics
Q. What is the force required (in Newtons) to hold a spherical balloon stationary in water at a depth of H from the air-water interface? The balloon is of radius 0.1 m and is filled with air.
  • (A) 4Ο€g/3
  • (B) 0.01Ο€gH/4
  • (C) 0.01Ο€gH/8
  • (D) 0.04Ο€gH/3
πŸ’¬ Discuss
βœ… Correct Answer: (A) 4Ο€g/3
πŸ“Š Fluid Mechanics
Q. With increase in molecular weight of the gas, the head developed by a centrifugal compressor will
  • (A) Unpredictable
  • (B) Remain same
  • (C) Increase
  • (D) Decrease
πŸ’¬ Discuss
βœ… Correct Answer: (D) Decrease
πŸ“Š Fluid Mechanics
Q. Priming of a centrifugal pump is done to
  • (A) Develop effective pressure rise by the pump
  • (B) Increase the mass flow rate of fluid
  • (C) Avoid chances of separation inside the impeller
  • (D) None of these
πŸ’¬ Discuss
βœ… Correct Answer: (C) Avoid chances of separation inside the impeller
πŸ“Š Fluid Mechanics
Q. Pressure drop (Ξ”p) for a fluid flowing in turbulent flow through a pipe is a function of velocity (V) as
  • (A) V1.8
  • (B) V-0.2
  • (C) V2.7
  • (D) V2
πŸ’¬ Discuss
βœ… Correct Answer: (D) V2
πŸ“Š Fluid Mechanics
Q. __________ pump is the most suitable device for discharging a liquid against a pressure of β‰₯ 1500 kgf/cm2.
  • (A) Vane
  • (B) Plunger
  • (C) Piston
  • (D) Centrifugal
πŸ’¬ Discuss
βœ… Correct Answer: (B) Plunger
πŸ“Š Fluid Mechanics
Q. Pressure drop in a fluidised bed reactor is __________ that in a similar packed bed reactor.
  • (A) More than
  • (B) Less than
  • (C) Same as
  • (D) None of these
πŸ’¬ Discuss
βœ… Correct Answer: (A) More than
πŸ“Š Fluid Mechanics
Q. The terminal velocity of a small sphere settling in a viscous fluid varies as the
  • (A) First power of its dimeter
  • (B) Inverse of the fluid viscosity
  • (C) Inverse square of the diameter
  • (D) Square of the difference in specific weights of solid & fluid
πŸ’¬ Discuss
βœ… Correct Answer: (B) Inverse of the fluid viscosity
πŸ“Š Fluid Mechanics
Q. The length of the tube necessary for the boundary layer to reach the centre of the tube and for fully developed flow to be established is called the __________ length.
  • (A) Transition
  • (B) Equivalent
  • (C) Prandtl mixing
  • (D) None of these
πŸ’¬ Discuss
βœ… Correct Answer: (A) Transition
πŸ“Š Fluid Mechanics
Q. The ratio of inertial forces to elastic forces is called the __________ number.
  • (A) Weber
  • (B) Euler
  • (C) Mach
  • (D) Reynolds
πŸ’¬ Discuss
βœ… Correct Answer: (C) Mach

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