Q. The ratio of hydrodynamic boundary layer to thermal boundary layer thickness in case of liquid metals is

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Q. The general relationship between speed N, head H, power P and discharge Q for a centrifugal pump is

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Q. What is the ratio of the velocity at the axis of the pipe to the mean velocity of flow in case of pipe flow under viscous condition ?

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Q. Foot valve provided in the pump is a __________ valve.

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Q. The discharge co-efficient for an orificemeter does not depend upon the

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Q. If the head over the triangular notch is doubled, the discharge will increase by __________ times.

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Q. Friction factor for a hydraulically smooth pipe at Nʀₑ = 2100 is f₁. If the pipe is further smoothened (i.e., roughness is reduced), the friction factor at the same value of Nʀₑ, will

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Q. For the laminar flow of a fluid in a circular pipe of radius R, the Hagen-Poisseule equation predicts the volumetric flow rate to be proportional to

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Q. Interstage coolers are provided in a multistage compressor to

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Q. The ratio of the wall drag to the form drag in the Stoke's law range (for motion of spherical particles in a stationary fluid) is

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Q. For turbulent flow in smooth circular pipe, the velocity distribution is a function of the distance 'd' measured from the wall of the pipe and the friction velocity 'v', and it follows a __________ relationship.

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Q. Maintenance cost of a __________ pump for a particular duty is the least.

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Q. Choking in case of pipe flow means that a

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Q. Velocity of liquid hydrocarbon fuels in a pipeline can not be measured by magnetic flowmeters, because their __________ is very low/small.

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Q. The nominal size of a hose pipe is specified by its

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Q. Transition from laminar flow to turbulent flow is aided by the

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

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Q. Cd is always __________ Cc.

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Q. Buoyant force

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Q. Which of the following options will facilitate the achievement of a very high head (say 30 metres) in case of a centrifugal pump?

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