Fluid Mechanics

151.Dimension of absolute viscosity is

1. ML^-1T^-1
2. MLT^-1
3. ML^-1T
4. MLT

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152.Dimension of kinematic viscosity is

1. MLT^-1
2. L2T^-1
3. L2T
4. L2T^-2

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153.Dimension of surface tension is (where, F = force, L = length)

1. FL^-1
2. F^-1. L
3. F.L^-2
4. F-2. L

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154.Disc compensators are provided in large diameter fuel gas carrying pipelines to

1. Keep the pipe in proper orientation
2. Make the pipe joint leak-proof
3. Account for contraction/expansion of pipe due to temperature changes of the surroundings
4. Account for the pressure variation side the pipeline

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155.Discharge from a 24 inch pipe of water at 10 ft/sec will be _________ ft3/sec.

1. 7.65
2. 32.36
3. 48.22
4. 125.6

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156.Discharge in laminar flow through a pipe varies

1. As the square of the radius
2. Inversely as the pressure drop
3. Inversely as the viscosity
4. As the square of the diameter

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157.Drag co-efficient CD, in Stoke's law range is given by

1. CD = 16/R_e.p
2. CD = 24/R_e.p
3. CD = 18.4/R_e.p
4. CD = 0.079/R_e ^0.25.p

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158.Drag co-efficient for flow past immersed body is the ratio of _________ to the product of velocity head and density.

1. Shear stress
2. Shear force
3. Average drag per unit projected area
4. None of these

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159.Drag co-efficient for motion of spherical particles in a stationary fluid in the stoke's law range is

1. 24/N_Re,P
2. 16/N_Re,P
3. 64/N_Re,P
4. 48/N_Re,P

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160.Drag co-efficient in hindered settling is _________ that in free settling.

1. Less than
2. Equal to
3. Not necessarily greater than
4. Always greater than

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