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.Management Sciences
Category: Fluid Mechanics for Chemical
Consider a centrifugal pump having a specific impeller diameter, fixed impeller speed pumping a liquid of constant density at a particular discharge capacity. With decrease in the capacity of the pump, the _______________ decreases?
A. NPSH required
B. BHP required by the pump
C. Head of the liquid pumped
D. All A., B. and C.
Manometers measure the ______________ pressure?
A. Vacuum as well as the atmospheric
B. Difference in
C. Absolute
D. Gage
Which of the following quantities are computed by using the hydraulic radius for noncircular ducts ?
A. Velocity and relative roughness
B. Head loss and velocity
C. Reynold number, relative roughness and head loss
D. Reynolds number and friction factor
Reciprocating pumps compared to centrifugal pumps__________________?
A. Deliver liquid at uniform pressure
B. Can handle slurries more efficiently
C. Are not subject to air binding
D. Can be operated with delivery valve closed
Two dimensional stream function________________?
A. Relates velocity and pressure
B. Is constant along a stream line
C. Is constant along an equipotential surface
D. None of these
Nominal size of a pipe is an indication of its ______________ diameter?
A. Inner
B. Outer
C. Approximate
D. None of these
Velocity at a certain point in case of streamline flow is_________________?
A. Constant
B. Independent of time
C. Both A. & B.
D. Neither A. nor B.
Sewage sludge is ______________ type of non-Newtonian fluid?
A. Dilatant
B. Bingham plastic
C. Pseudo plastic
D. None of these
Which of the following equations applies to the fluid flow through a packed bed for very large Reynolds number ?
A. Fanning equation
B. Blake-Plummer equation
C. Hagen-Poiseuille equation
D. Kozeny-Carman equation
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