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.Management Sciences
Category: Fluid Mechanics for Chemical
The net positive suction head (NPSH) of a centrifugal pump is defined as the sum of the velocity head and the pressure head at the_________________?
0
A. Discharge
B. Suction
C. Suction minus vapor pressure of the liquid at suction temperature
D. Discharge minus vapor pressure of the liquid at the discharge temperature
Working of a _______________ pump characterises mixed flow?
A. Turbine
B. Piston
C. Diaphragm
D. None of these
Velocity head on sudden enlargement in a horizontal pipe is converted into ______________ head?
A. Elevation
B. Pressure
C. Both A. & B.
D. Neither A. nor B.
Self-priming centrifugal pump can be used for________________?
A. Booster service
B. Pumping liquid fertilisers (e.g. liquid NH3)
C. Pumping industrial wastes
D. All A., B. and C.
In case of a centrifugal pump, the theoretical head developed is dependent on the _____________ the impeller?
A. Speed of
B. Diameter of
C. Fluid velocity leaving
D. All A., B. and C.
With increase in the ratio of orifice diameter to pipe diameter in case of an orificemeter, the overall pressure loss_______________?
A. Decreases
B. Increases
C. Remain constant
D. Increases linearly
In fluid flow, the stagnation point is defined as a point, where the _____________ is zero?
A. Flow velocity
B. Pressure
C. Total energy
D. All A., B. and C.
Major loss in sudden contraction in pipe flow is due to ________________?
A. Boundary friction
B. Flow contraction
C. Expansion of flow after sudden contraction
D. None of these
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