Fluid Mechanics Paper Set for practice

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Fluid Mechanics Paper Set 2
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1

The power absorbed (in watts) in overcoming the viscous resistance of a footstep bearing is


2

The depth of center of pressure of an immersed surface, inclined at an angle 'θ' with the liquid surface lies at a distance equal to __________ the center of gravity.


3

The tangential velocity of the water element having a free vortex is


4

According to Darcy's formula, the loss of head due to friction in the pipe is (where f = Darcy's coefficient, l = Length of pipe, v = Velocity of liquid in pipe, and d = Diameter of pipe)


5

A tank of uniform cross-sectional area (A) containing liquid upto height (H1) has an orifice of cross-sectional area (a) at its bottom. The time required to bring the liquid level from H1 to H2 will be


6

A hemispherical tank of radius (R) has an orifice of cross-sectional area (a) at its bottom and is full of liquid. The time required to empty the tank completely is


7

The imaginary line drawn in the fluid in such a way that the tangent to any point gives the direction of motion at that point, is known as


8

A compound pipe of diameter d1d2 and d3 having lengths l1l2 and l3 is to be replaced by an equivalent pipe of uniform diameter d and of the same length (l) as that of the compound pipe. The size of the equivalent pipe is given by


9

Reynolds number is significant in


10

When a body is immersed wholly or partially in a liquid, it is lifted up by a force equal to the weight of liquid displaced by the body. This statement is called


11

The loss of head due to viscosity for laminar flow in pipes is (where d = Diameter of pipe, l = Length of pipe, v = Velocity of the liquid in the pipe, μ = Viscosity of the liquid, and w = Specific weight of the flowing liquid)


12

According to Bernoulli's equation


13

 The torque required to overcome viscous resistance of a footstep bearing is (where μ = Viscosity of the oil, N = Speed of the shaft, R = Radius of the shaft, and t = Thickness of the oil film)


14

The increase in pressure at the outer edge of a drum of radius (r) completely filled up with liquid of density (ρ) and rotating at (ω) rad/s is


15

When the water level on the downstream side of a weir is above the top surface of a weir, the weir is known as


16

A pressure of 25 m of head of water is equal to