Fluid Mechanics

561.The rate of shear versus the shear stress curves are time dependent for _________ fluid.

1. Thixotropic
2. Rheopectic
3. Both (A) & (B)
4. Neither (A) nor (B)

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562.The ratio of actual discharge to theoretical discharge through an orifice is equal to

1. C_c . C_v
2. C_c . C_d
3. C_v . C_d
4. C_d/C_v

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563.The ratio of average fluid velocity to the maximum velocity in case of laminar flow of a Newtonian fluid in a circular pipe is

1. 0.5
2. 1
3. 2
4. 0.66

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564.The ratio of hydrodynamic boundary layer to thermal boundary layer thickness in case of liquid metals is

1. < 1
2. 1
3. > 1
4. 2

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565.The ratio of inertial forces to elastic forces is called the _________ number.

1. Reynolds
2. Mach
3. Euler
4. Weber

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566.The ratio of inertial forces to gravity forces is called the _________ number.

1. Mach
2. Froude
3. Euler
4. Weber

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567.The ratio of inertial forces to viscous forces is called the _________ number.

1. Weber
2. Mach
3. Froude
4. Reynold

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568.The ratio of maximum to average velocity in case of streamline flow between parallel plates is

1. 1
2. 1.5
3. 2
4. 2.5

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569.The ratio of pressure forces to inertial forces is called the _________ number.

1. Froude
2. Euler
3. Reynold
4. Mach

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570.The ratio of the depth of flow to the diameter of the channel for maximum discharge in a circular channel in open channel flow is

1. 0.1
2. 0.55
3. 0.95
4. 1.85

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