Reynolds number for water flow through a tube of I.D. 5 cm is 1500. If a liquid of 5 centipoise viscosity and 0.8 specific gravity flows in the same pipe at the same velocity, then the pressure drop will______________________?

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A pressure of 10 m head of water is equivalent to ______________ kN/m2?

A. 98 B. 147 C. 196 D. 49...

Prandtl mixing length is___________________?

A. Applicable to laminar flow problems B. A universal constant C. Zero at the pipe wall D. None of these...

Consider two pipes of same length and diameter through which water is passed at the same velocity. The friction factor for rough pipe is f1 and that for smooth pipe is f2. Pick out the correct statement ?

A. f1 = f2 B. f1 < f2 C. f1 > f2 D. Data not sufficient to relate f1 & f2...

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

A. Flow of liquid upward in a vertical pipe B. Flow through a converging section C. Flow of air downward in a pipe D. Impossible in a constant cross-section conduit...

Erosion and pits formation on the impeller of a centrifugal pump may be due to________________?

A. Cavitation B. Low speed of impeller C. Its operation with delivery valve closed for considerable time after starting the pump D. Off centering of pump with motor...