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.Management Sciences
Category: Fluid Mechanics for Chemical
Assuming flow to be laminar, if the diameter of the pipe is halved, then the pressure drop will_______________?
A. Increase
B. Decrease
C. Remain same
D. Be quadrupled
Potential function is applicable only for __________ flow?
A. Irrotational
B. Turbulent
C. Steady
D. None of these
The boundary layer thickness at a given section along a flat plate _____________ with increasing Reynold’s number?
A. Increases
B. Decreases
C. Remain same
D. May increase or decrease
The energy loss in flow through Venturimeter is less than that through flow nozzle, because in case of a flow nozzle, the ?
A. Length is shorter
B. Throat diameter is more
C. Sudden expansion of flow in the downstream occurs
D. Distance between the throat and the inlet is more
Pick out the correct statement?
A. Human blood is a Newtonian fluid
B. A Newtonian fluid obeys Newton’s law of cooling
C. For a non-Newtonian fluid, a straight line passes through the origin in a plot between shear
stress and shear gradient
D. Thin lubricating oil is an example of a non-Newtonian fluid
In the complete turbulence zone (in rough pipes), the____________________?
A. Rough and smooth pipes have the same friction factor
B. Laminar film covers the roughness projections
C. Friction factor depends upon NRe only
D. Friction factor is independent of the relative roughness
Centrifugal pumps as compared to reciprocating pumps__________________?
A. Run at a lower speed for the same discharge
B. Do not need priming
C. Deliver fluid with pulsating/fluctuating discharge
D. Can be run with discharge line valve closed for a short interval
Hydraulic mean radius for flow through packed bed of spherical particle of size, ‘Dp, with porosity ‘ε’ is________________?
A. (Dp/6) (ε/1- ε)
B. (Dp/6) (1- ε/ε)
C. ⅔Dp (1- ε/ε)
D. ⅔Dp (ε/1- ε)
Draining of shallow pits or sump is done by a sump pump, which is a ______________ pump?
A. Single stage vertical
B. Centrifugal
C. Plunger
D. Diffuser
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