A. high initial and maintenance cost
B. lower discharge
C. lower speed of operation
D. necessity of air vessel
E. all of the above
Related Mcqs:
- Multistage centrifugal pumps are used to obtain___________________?
A. high discharge
B. high head
C. pumping of viscous fluids
D. high head and high discharge
E. high efficiency - In centrifugal pumps, maximum efficiency is obtained when the blades are_________________?
A. straight
B. bent forward
C. bent backward
D. radial
E. given aerofoil section - 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 - 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 - 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 - 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%. - 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%. - For very high discharge at low pressure such as for flood control and irrigation applications, following type of pump is preferred_________________?
A. centrifugal
B. axial flow
C. reciprocating
D. mixed flow
E. none of the above - Puck up the wrong statement about centrifugal pump_______________?
A. discharge a diameter
B. head a speed2
C. head a diameter
D. Power a speed3
E. none of the above is wrong - Casting of a centrifugal pump is designed so as to minimize________________?
A. friction loss
B. cavitation
C. static head
D. loss of kinetic energy
E. starting time
