Fluid Mechanics

471.The continuity equation of fluid mechanics utilises the principle of conservation of

1. Momentum
2. Mass
3. Energy
4. Both (B) & (C)

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472.The contraction co-efficient for Borda's mouthpiece (for frictionless fluid) is

1. 0.1
2. 0.5
3. 0.94
4. 1

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473.The curve of metacentre for a floating body _________ the curve of buoyancy.

1. Is always below
2. Is the evolute of
3. Intersects at right angle
4. Is tangential to

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474.The dimension of dynamic viscosity is

1. ML-1T-1
2. L2T-1
3. LT-2
4. ML-1T-2

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475.The dimension of kinematic viscosity is

1. ML^-2T^-1
2. L²T^-1
3. ML^-2T^-2
4. None of these

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476.The dimension of surface tension is

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

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477.The discharge co-efficient for an orifice meter does not depend upon the

1. Pipe length
2. Ratio of pipe diameter to orifice diameter
3. Type of orifice & the Reynolds number
4. Pipe diameter

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478.The discharge through a rectangular weir varies as

1. H^1/2
2. H^5/2
3. H^2/5
4. H^3/2

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479.The discharge through a semi-circular weir varies as (where, H = Head of liquid.)

1. H
2. H²
3. H^3/2
4. H^1/2

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480.The discharge through a Venturimeter depends upon

1. Pressure drop only
2. Its orientation
3. Co-efficient of contraction only
4. None of these

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