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.Management Sciences
Category: Fluid Mechanics for Chemical
Drag co-efficient for flow past immersed body is the ratio of _____________ to the product of velocity head and density?
0
A. Shear stress
B. Shear force
C. Average drag per unit projected area
D. None of these
Diaphragm valves are used for handling _______________ fluids?
A. Corrosive
B. Viscous
C. Non-Newtonian
D. Solid suspended
For flow through a venturi at a particular discharge, the correct relationships among heads at points X, Y, and Z are__________________?
A. h1 > h2 < h3
B. h1 > h2 > h3
C. h2 < h1 < h3
D. h1 < h2 < h3
The main factor on which the behaviour of a mass of fluidised solid depends mainly is the___________________?
A. Fluid characteristics
B. Particle size
C. Both A. and B.
D. Neither A. nor B.
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
Centrifugal pump is normally classified on the basis of the________________?
A. rpm
B. Type of casing
C. Impeller blade angle
D. Number of blades in impeller
Purpose of air lift pump is to____________________?
A. Compress air
B. Lift compressed air
C. Lift water from a well by using compressed air
D. Lift air under negative pressure
Theoretical head developed by a centrifugal pump does not depend upon the _____________ the impeller?
A. Radius of
B. Speed of
C. Fluid velocity leaving
D. None of these
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