Top 50+ Solved Centrifugal Pumps MCQ Questions Answer
From 1 to 11 of 11
Q. Which of the following types of impeller is used for centrifugal pumps dealing with muds?
a. One-side shrouded
b. Two -sides shrouded
c. Double section
d. Open.
Q. Which of the following statements is correct with reference to an impeller with backward curved vanes?
a. It has a falling head - discharge characteristic.
b. It has rising head - discharge characteristic
c. It is easier to fabricate.
d. It cannot run at speeds other than the design spee
Q. The head developed by a centrifugal pump may be expressed as
a. H = (Vw2 u2 + Vw1 u2)/g
b. H = Vw2 u2 /g
c. H = Vw1 u1 /g
d. None of the above.
Q. With reference to a centrifugal pump which of the following statements is incorrect?
a. The discharge control valve is fitted in the delivery pipe.
b. The suction pipe is provided with a foot valve and a strainer.
c. The suction pipe has larger diameter as compared to the discharge pipe.
d. The discharge control valve is fitted in the suction pipe.
Q. A centrifugal pump should be so installed above the water level in the sump such that
a. The negative pressures are not allowed to develop in the impeller
b. The negative pressures do not reach as low a value as the vapour pressure
c. Its height is more than 10·28 m at ordinary temperature of liquid
d. None of the above.
Q. The specific speed of a pump is defined as the speed of unit of such a size that it
a. Produces unit power with unit head available
b. Delivers unit discharge at unit head
c. Requires unit power to develop unit head
d. Delivers unit discharge at unit power.
Q. Which of the following statements pertaining to a given centrifugal pump is correct?
a. Discharge varies as the square of speed
b. Power varies as the square of speed
c. Discharge varies directly as speed
d. Head varies inversely as spee
Q. The delivery valve, while starting centrifugal pump, is kept
a. Fully closed
b. Fully open
c. Half open
d. In any position.
Q. Which of the following is not a dimensionless parameter?
a. Friction factor
b. Specific speed
c. Thoma’s cavitation parameter
d. Pressure co-efficient.
Q. With reference to manometric head which of the following statements is correct?
a. It is the head developed by the pump.
b. It is the height to which water is lifted by the pump measured above the pump centreline.
c. it is the difference in elevation between the water surface in the high level reservoir and the water level in the sump.
d. It is the difference in the piezometric heads between the points on the delivery and suction pipes as close to the pump as possible.
Q. Higher specific speeds (160 to 500) of centrifugal pump indicate that the pump is of
a. Radial flow type
b. Axial flow type
c. Mixed flow type
d. Any of these types.
- 1 (current)