Fluid Mechanics

201.For an incompressible fluid, the bulk modulus of elasticity is

1. 5 kg/m³
2. ∞ N/m²
3. 1 N
4. 0 N/m

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202.For an unstable equilibrium of a floating body (where, M = metacentre.)

1. M is above G
2. M is below G
3. M & G coincide
4. None of these

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203.For flow of fluids through packed bed, the superficial velocity is

1. Less than the average velocity through channels
2. More than the average velocity through channels
3. Dependent on the pressure drop across the bed
4. Same as the average velocity through channels

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204.For flow past a flat plate, if „x‟ is the distance along the plate in the direction of flow, the boundary layer thickness is proportional to

1. √x
2. 1/√x
3. x
4. 1/x

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205.For flow through an orifice from a reservoir, the actual velocity at the vena contracta is given by

1. √(2gh)
2. C.V. √(2gh)
3. C_d √(2gh)
4. C_c √(2gh)

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206.For ideally incompressible fluid, the Mach number will be

1. 1.5
2. 1
3. 0
4. 5

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207.For laminar flow of a fluid through a packed bed of spheres of diameter d, the pressure drop per unit length of bed depends upon the sphere diameter as

1. d
2. d²
3. d⁴
4. d̅ 2

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208.For laminar flow of a shear thinning liquid in a pipe, if the volumetric flow rate is doubled, the pressure gradient will increase by a factor of

1. 2
2. < 2
3. > 2
4. 43862

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209.For laminar flow of Newtonian fluid in a circular pipe, the velocity distribution is a function of the distance 'd' measured from the centre line of the pipe, and it follows a _________ relationship.

1. Logarithmic
2. Parabolic
3. Hyperbolic
4. Linear

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210.For laminar flow of Newtonian fluids through a circular pipe, for a given pressure drop and length & diameter of pipe, the velocity of fluid is proportional to (where, μ = fluid viscosity )

1. μ
2. 1/μ
3. √μ
4. 1/√μ

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