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.Management Sciences
Category: Fluid Mechanics for Chemical
A floating/submerged body is always stable, if its centre of gravity___________________?
A. Lies above its centre of buoyancy
B. And centre of buoyancy coincide
C. Lies below its centre of buoyancy
D. Lies above its metacentre
The rate of shear versus the shear stress curves are time dependent for _____________ fluid?
A. Thixotropic
B. Rheopectic
C. Both A. & B.
D. Neither A. nor B.
The pressure and power requirement of a gas fan at constant speed & capacity varies ____________ the gas density?
A. Directly as
B. Inversely as square root of
C. Inversely as
D. As square of
Specific speed of a centrifugal pump depends upon the ______________ head?
A. Suction
B. Delivery
C. Manometric
D. None of these
Power required for mixing Newtonian fluids is a function of the _________________?
A. Speed of impeller, diameter of impeller & viscosity
B. Density & viscosity of fluid only
C. Density of fluid, viscosity of fluid & impeller dia only
D. None of these
Stoke’s law is valid, when the particle Reynolds number is ______________________?
A. < 1
B. > 1
C. < 5
D. None of these
In case of a centrifugal pump, the ratio of total delivered pressure to pressure developed with the impeller is called the _____________ efficiency?
A. Manometric
B. Mechanical
C. Volumetric
D. Overall
Bernoulli’s equation is not applicable, when the flow is___________________?
A. Irrotational
B. Incompressible
C. Viscous
D. All A., B. & C.
The flow of a liquid through tapering pipe at a constant rate is an example of _______________ flow?
A. Steady uniform
B. Steady non uniform
C. Unsteady uniform
D. Unsteady non uniform
Which of the following is most prone to pulsating discharge flow ?
A. Centrifugal pump
B. Reciprocating pump
C. Gear pump
D. Axial flow pump
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