Fluid Mechanics

101. Non uniform flow occurs when

  1. the direction and magnitude of the velocity at all points are identical
  2. the velocity of successive fluid particles, at any point, is the same at successive periods of time
  3. the magnitude aricf direction of the velocity do not change from point to point in the fluid
  4. the fluid particles move in plane or parallel planes and the streamline pat-terns are identical in each plane
  5. velocity, depth, pressure, etc. change from point to point in the fluid flow.

Correct answer: (E)
velocity, depth, pressure, etc. change from point to point in the fluid flow.

102. Normal depth in open channel flow is the depth of flow corresponding to

  1. steady flow
  2. unsteady flow
  3. laminar flow
  4. uniform flow
  5. critical flow.

Correct answer: (D)
uniform flow

103. Operation of McLeod gauge used for low pressure measurement is based on the principle of

  1. gas law
  2. Boyle’s law
  3. Charle’s law
  4. Pascal’s law
  5. McLeod’s law.

Correct answer: (B)
Boyle’s law

104. ow of water in a pipe about 3 metres in diameter can be measured by

  1. orifice plate
  2. venturi
  3. rotameter
  4. pitot tube
  5. nozzle

Correct answer: (D)
pitot tube

105. Piezometer is used to measure

  1. pressure in pipe, channels etc.
  2. atmospheric pressure
  3. very low pressures
  4. difference of pressure between two points
  5. flow.

Correct answer: (C)
very low pressures

106. Pitot tube is used for measurement of

  1. pressure
  2. flow
  3. velocity
  4. dsscharge
  5. viscosity.

Correct answer: (C)
velocity

107. Poise is the unit of

  1. surface tension
  2. capillarity
  3. viscosity
  4. shear stress in fluids
  5. buoyancy.

Correct answer: (C)
viscosity

108. Practical fluids

  1. are viscous
  2. possess surface tension
  3. are compressible
  4. possess all the above properties
  5. possess none of the above properties.

Correct answer: (D)
possess all the above properties

109. Pressure of the order of 10″‘ torr can be measured by

  1. Bourdon tube
  2. Pirani Gauge
  3. micro-manometer
  4. ionisastion gauge
  5. McLeod gauge.

Correct answer: (D)
ionisastion gauge

110. Principle of similitude forms the basis of

  1. comparing two identical equipments
  2. designing models so that the result can be converted to prototypes
  3. comparing similarity between design and actual equipment
  4. hydraulic designs
  5. performing acceptance tests.

Correct answer: (B)
designing models so that the result can be converted to prototypes

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