A. designing new impeller
B. trimming the impeller size to the required size by machining
C. not possible
D. some other alterations in the impeller
E. none of the above
Related Mcqs:
- In a centrifugal pump casing, the flow of water leaving the_______________?
A. radial
B. radial
C. centrifugal
D. rectilinear
E. vortex - Motion of a liquid in a volute casing of a centrifugal pump is an example of____________________?
A. rotational flow
B. radial
C. forced spiral vortex flow
D. forced cylindrical vortex flow
E. spiral vortex flow - In a centrifugal pump casing, the flow of water leaving the impeller, is___________________?
A. rectilinear flow
B. radial flow
C. free vortex motion
D. forced vortex
E. none of the above - If a pump is handling water and is discharging a certain flow Q at a constant total dynamic head requiring a definite B.H.P., the same pump when handling a liquid of specific gravity 0.75 and viscosity nearly same as of water would discharge_____________________?
A. same quantity of liquid
B. 0.75 Q
C. Q/0.75
D. 1.5 Q
E. none of the above - Saving of work done and power by fitting an air vessel to single acting reciprocating pump is of the order of__________________?
A. 39.2%
B. 49.2%
C. 68.8%
D. 84.8%
E. 91.6%. - According to fan laws, at constant speed and capacity, the pressure and power vary_____________________?
A. directly as the air or gas density
B. inversely as square root of density
C. inversely as density
D. as square of density
E. as square root of density - According to fan laws, at constant weight of air or gas, the speed, capacity and pressure vary________________?
A. directly as the air or gas density
B. inversely as square root of density
C. inversely as density
D. as square of density
E. as square root of density - According to fan laws, at constant pressure, the speed capacity and power vary_________________?
A. directly as the air or gas density
B. inversely as square root of density
C. inversely as density
D. as square of density
E. as square root of density - A turbine pump is basically a centrifugal pump equipped additionally with_________________?
A. adjustable blades
B. backward curved blades
C. vaned diffusion casing
D. inlet guide blades
E. totally submerged operation facility - Saving of work done and power by fitting an air vessel to double acting reciprocating pump is of the order of_______________?
A. 39.2%
B. 49.2%
C. 68.8%
D. 84.8%
E. 91.6%.
