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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Air vessel of a reciprocating pump is initially filled with___________________?

A. Atmospheric air B. Compressed air C. Water D. None of these...

In centrifugal pumps, cavitation occurs, when pressure of the impeller eye or vane becomes_______________?

A. Less than atmospheric pressure B. More than liquid vapor pressure C. Less than liquid vapor pressure D. More than atmospheric pressure...

Pick out the correct statement pertaining to transition/ entrance length in fluid flow ?

A. The length of entrance region of pipe, in which full development of fluid flow takes place such that velocity profile does not change downstream, is called the transition length B. Transition length for laminar flow of Newtonian fluids in a pipe of diameter ‘d’ is equal to 0.05. D.NRe C. Transition length for turbulent … Pick out the correct statement pertaining to transition/ entrance length in fluid flow ?Read More...

The effect of solid boundary on the fluid flow is confined to the boundary layer, except for fluids ?

A. Having high viscosities B. Moving at low velocities C. Both A. & B. D. Neither A. nor B....

Boundary layer exists in flow_________________?

A. Of real fluids B. Over flat surfaces only C. In pipes only D. Of ideal fluids only...