Q. Prandtl number is a measure of the

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Q. A centrifugal pump has the following specifications:

Power = 4 H.P.
Speed = 800 rpm
Head = 8 metres
Flow = 1000 litres/minutes.

If its speed is halved, then the new head will be __________ metres.

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Q. In hindered settling, the particles are

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Q. A bed of spherical particles (specific gravity 2.5) of uniform size 1500 μm is 0.5 m in diameter and 0.5 m high. In packed bed state, the porosity may be taken as 0.4. Ergun's equation for the above fluid-particle system (in SI units) is given below :

Δ P/L = 375 x 10³ Vₒₘ + 10.94 x 10⁶ V²ₒₘ (SI units)

If water is to be used as the fluidising medium, in actual operation, the above bed has a height = 1 m. What is the porosity of the fluidised bed ?

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Q. Dimension of kinematic viscosity is

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Q. A streamline is a line in flow field,

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Q. While starting an axial flow pump, its delivery valve should be kept

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Q. __________ forces do not act in case of fluid flow.

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Q. An ideal plastic substance indicates no deformation, when stressed upto yield stress, but behaves like a Newtonion fluid beyond yield stress. Which of the following is an ideal plastic ?

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Q. The capacity of a centrifugal pump Can be increased by increasing the

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Q. Which law is followed by the velocity distribution in the turbulent boundary layer?

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Q. The losses in open channel flow generally vary as the

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Q. Rise of liquid in a capillary tube is due to

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Q. At what value of crank angle (roughly), no flow of water from or into the air vessel takes place in case of a double acting reciprocating pump ?

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Q. The range of a particular rotameter can be increased by

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Q. Which of the following is dimensionless ?

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Q. A liquid is pumped at the rate of 600 litres using 1000 rpm. If the rpm is changed to 1100, the liquid pumped is __________ litres.

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Q. A compressor that takes suction at a pressure below atmospheric and discharge against atmospheric pressure is called a __________ pump.

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Q. Non-colloidal solution is an example of the __________ fluid.

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Q. Boundary layer separation is caused by the

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