Q. A centrifugal pump designed to pump water is employed to pump a more viscous oil. In the later case, the pump

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Q. In which of the following cases, it is possible for flow to occur from low pressure to high pressure ?

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Q. Which of the following is not a dimension-less parameter ?

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Q. Stoke's law is valid, when the particle Reynolds number is

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

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Q. The Reynolds number for an ideal fluid flow is

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Q. Which of the following conditions must be satisfied for lift force to be developed ?

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Q. Critical velocity in a pipe flow

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Q. The co-efficient of discharge of an orificemeter is a function of

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Q. A floating/submerged body is always stable, if its centre of gravity

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Q. For the same terminal conditions and fitting size, the least friction loss is incurred in a/an

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Q. The blades of a centrifugal impeller are said to be curved forward, if the __________ of the motion of impeller blades.

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Q. The velocity profile exhibited by laminar flow of Newtonion fluids is such that the velocity distribution w.r.t. radius of the circular pipe is a/an __________ with the apex at the centre line of the pipe.

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Q. Erosion and pits formation on the impeller of a centrifugal pump may be due to

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Q. Which of the following properties of a fluid is responsible for offering resistance to shear ?

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Q. The unit of velocity head is

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Q. One dimensional flow implies

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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 V² ₒₘ (SI units)

If water is to be used as the fluidising medium, the minimum fluidisation velocity, Vₒₘ is

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Q. A rectangular surface 3' x 4', has the lower 3 edge horizontal and 6' below a free oil surface (sp. gr. 0.8). The surface inclination is 300 with the horizontal. The force on one side of the surface is (where, y = specific weight of water)

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Q. In centrifugal pump operation, the cavitation can be eliminated by maintaining suction pressure __________ the vapor pressure of the liquid at the suction temperature.

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