A. 39.2%
B. 49.2%
C. 68.8%
D. 84.8%
E. 91.6%.
Related Mcqs:
- 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%. - Air vessels in reciprocating pump are used to__________________?
A. smoothen flow
B. reduce acceleration to minimum
C. increase pump efficiency
D. save pump from cavitation
E. increase pump head - Indicator diagram of a reciprocating pump is a graph between________________?
A. flow vs swept volume
B. pressure in cylinder vs swept volume
C. flow vs speed
D. pressure vs speed
E. swept volume vs speed - In a single casing, multistage pump running at constant speed, the capacity rating is to be slightly lowered. It can be done by_______________?
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 - 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 - 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 - Reciprocating pumps are no more to be seen in industrial applications (in comparison to centrifugal pumps) because of____________________?
A. high initial and maintenance cost
B. lower discharge
C. lower speed of operation
D. necessity of air vessel
E. all of the above - When a piping system is made up primarily of friction head and very little of vertical lift, then pump characteristics should be__________________?
A. horizontal
B. nearly horizontal
C. steep
D. first rise and then fall
E. none of the above - For small discharge at high pressure, following pump is preferred_____________________?
A. centrifugal
B. axial flow
C. mixed flow
D. propeller
E. reciprocating - High specific speed of a pump implies it is_____________________?
A. centrifugal pump
B. mixed flow pump
C. axial flow pump
D. any one of the above
E. none of the above
