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.Management Sciences
Category: Fluid Mechanics for Chemical
Drag force on the float of a Rotameter is (where Q = flow rate of the)__________________?
A. ∝ Q
B. ∝ √Q
C. ∝ Q2
D. Constant
Water hammer is caused, when water flowing in a pipe is suddenly brought to rest by closing the valve. The extent of pressure thus produced due to water hammer depends on the___________________?
A. Pipe length
B. Fluid velocity in the pipe
C. Time taken to close the valve
D. All A., B. and C.
The most economical flow control valve for use with large diameter pipes is a__________________?
A. Butterfly valve
B. Globe valve
C. Needle valve
D. None of these
What is the maximum theoretical suction lift (metres) of a reciprocating pump ?
A. 5
B. 10
C. 50
D. 100
Applicability of Bernoulli’s equation is limited to a/an _____________ fluid, that does not exchange shaft work with the surroundings?
A. Incompressible
B. Non-viscous
C. Both A. and B.
D. Neither A. nor B.
An ideal plastic substance indicates no deformation, when stressed upto yield stress, but behaves like a Newtonian fluid beyond yield stress. Which of the following is an ideal plastic ?
A. Sewage sludge
B. Rubber latex
C. Blood
D. Sugar solution
Velocity of liquid hydrocarbon fuels in a pipeline cannot be measured by magnetic flowmeters, because their ______________ is very low/small?
A. Thermal conductivity
B. Electrical conductivity
C. Specific gravity
D. Electrical resistivity
Nominal Pipe Size (NPS) of a pipe less than 12 inches in diameter indicates its________________?
A. Inner diameter
B. Outer diameter
C. Thickness
D. Neither inner nor outer diameter
If two capillary tubes of dia 0.5 mm and 1 mm are dipped in a pot containing mercury, then the rise of mercury is_________________?
A. Same in both the tubes
B. Greater in 1 mm dia tube
C. Greater in 0.5 mm dia tube
D. Zero in both the tubes
The velocity for subsonic flow in a pipeline_______________?
A. Increases in the downstream direction
B. Is constant
C. Decreases in the downstream direction
D. Is independent of the area of flow
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