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.Management Sciences
Category: Fluid Mechanics for Chemical
Cd is always ______________ Cc?
A. Greater than
B. Less than
C. Equal to
D. Either more or less than
Propeller type centrifugal pumps are most suitable for__________________?
A. High capacity at high heads
B. High capacity at low heads
C. Low capacity at high heads
D. Low capacity at low heads
Bernoulli’s equation for fluid flow is derived following certain assumptions. Out of the assumptions listed below, which set of assumptions is used in derivation of Bernoulli’s equation? A. Fluid flow is frictionless & irrotational. B. Fluid flow is steady. C. Fluid flow is uniform & turbulent. D. Fluid is compressible. E. Fluid is incompressible ?
A. A, C, D
B. B, D, E
C. A, B, E
D. A, D, E
The Navier-Stokes equation deals with the law of conservation of___________________?
A. Mass
B. Energy
C. Both A. & B.
D. Momentum
Viscosity of water is about _____________ times that of air at room temperature?
A. 15
B. 55
C. 155
D. 1050
The friction factor is___________________?
A. Always inversely proportional to the Reynolds number
B. Not dimensionless
C. Not dependent on the roughness of the pipe
D. None of these
Shear stress in a fluid flowing in a round pipe_________________?
A. Varies parabolically across the cross-section
B. Remains constant over the cross-section
C. Is zero at the centre and varies linearly with the radius
D. Is zero at the wall and increases linearly to the centre
The distance between metacentre and ______________ is called metacentric height?
A. Water surface
B. Centre of gravity
C. Centre of buoyancy
D. None of these
Cavitation in a pump creates so many undesirable effects. Out of the following, which is not an undesirable effect created by cavitation ?
A. Decrease in effect
B. Increase in thrust
C. Develops noise
D. Develops high pressure
Flow rate of high velocity flue gas discharged through a stack to the atmosphere can be most conveniently measured by a _________________?
A. Pitot tube
B. Manometer
C. Rotameter
D. None of these
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