☰ Fluid Mechanics and Hydraulics (Civil Engineering) - MCQs

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Q7.

Critical depth at a section of a rectangular channel is 1.5 m. The specific energy at that section is :

  • A. 0. 75 m
  • B. 1. 0 m
  • C. 1. 5 m
  • D. 2. 25 m

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Q8.

The distance y from pipe boundary , at which the point velocity is equal to average velocity for turbulent flow, is :

  • A. 0. 223 R
  • B. 0. 423 R
  • C. 0. 577 R
  • D. 0. 707 R

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Q9.

Which of the following is not a non- dimensional parameter ?

  • A. Froude number
  • B. Darcy - Weisbach friction factor
  • C. Chezy's co- efficient
  • D. Mach number

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Q10.

For laminar flow between parallel plates separated by a distance 2h, head loss varies:

  • A. directly as h
  • B. inversely as h
  • C. directly as h 2
  • D. inversely as h3

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Q11.

In a laminar flow through a circular pipe of diameter 20 cm, the maximum velocity is found to be 1 m/s. The velocity at a radial distance of 5 cm from the axis of the pipe will be:

  • A. 0. 25 m/s
  • B. 0. 50 m/s
  • C. 0. 75 m/s
  • D. 1.0 m/s

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Q12.

The depth 'd' below the tree surface at which the point velocity of flow for a uniform laminar flow with a free surface , will be :

  • A. 0.423 D
  • B. 0. 577 D
  • C. 0.223 D
  • D. 0. 707 D

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