4B Power Engineering: Unit 2 - Pumps and Compressors
Questions With Complete Solutions
) The seal cage on the shaft of a centrifugal pump:
Select one:
a. holds the shaft packing against the shoulder of the stuffing
box
b. assists in reducing shaft vibration
c. distributes sealing fluid to the stuffing box
d. prevents fluid from leaking out of the pump casing Correct
Answers c
A centrifugal pump consists of:
Select one:
a. A pulsating disc
b. Sliding vanes
c. Gears rotating in a housing
d. An impeller surrounded by a casing Correct Answers An
impeller surrounded by a casing
A centrifugal pump consists of:
Select one:
a. A pulsating disc
b. Sliding vanes
c. Gears rotating in a housing
d. An impeller surrounded by a casing Correct Answers d
A check valve placed at the terminus of a suction line to prevent
reverse flow is called a:
Select one:
a. stop valve
,b. foot valve
c. bottoming valve
d. prime valve Correct Answers b
A circulating pump, known as a cooling water pump,is usually:
Select one:
a. A small capacity pump
b. A once-through device
c. A reciprocating pump
d. Connected with some type of heat exchanger system Correct
Answers Connected with some type of heat exchanger system
A circulating pump, known as a cooling water pump,is usually:
Select one:
a. A small capacity pump
b. A once-through device
c. A reciprocating pump
d. Connected with some type of heat exchanger system Correct
Answers d
A compressor that has flow along the shaft of the compressor is
considered to be:
Select one:
a. an axial flow compressor
b. an offset flow compressor
c. a radial flow compressor
d. a diffused flow compressor Correct Answers a
A device that connects two shafts mechanically and transmits
power from one shaft to another is called a:
Select one:
,a. coupling
b. connector
c. fastener
d. clamp Correct Answers a
A diffuser pump:
Select one:
a. does not have a volute
b. does not have to be primed
c. has high suction lift
d. is more effective at changing velocity to pressure than a
volute pump Correct Answers d
A diffuser pump:
Select one:
a. is more effective at changing velocity to pressure than a
volute pump
b. Has high suction lift
c. Does not have a volute
d. Does not have to be primed Correct Answers a
A diffuser pump:
Select one:
a. is more effective at changing velocity to pressure than a
volute pump
b. Has high suction lift
c. Does not have a volute
d. Does not have to be primed Correct Answers is more
effective at changing velocity to pressure than a volute pump
A double-acting pump:
, Select one:
a. Is a positive displacement pump
b. Has two slide valves
c. Has two pistons on the driver end
d. Has two pistons on the pump end Correct Answers a
A double-acting pump:
Select one:
a. Is a positive displacement pump
b. Has two slide valves
c. Has two pistons on the driver end
d. Has two pistons on the pump end Correct Answers Is a
positive displacement pump
A drop in suction pressure, after starting a pump for the first
time, is an indication of:
Select one:
a. a faulty pump
b. a faulty foot valve
c. a plugged strainer
d. improper rotation Correct Answers c
A inspection of a pump that is in operation should include:
Select one:
a. ensuring water flows freely from the packing
b. ensuring water drips from the mechanical seals
c. checking that the suction and discharge pressures are correct
d. re-priming the pump Correct Answers c
A inspection of a pump that is in operation should include:
Select one:
Questions With Complete Solutions
) The seal cage on the shaft of a centrifugal pump:
Select one:
a. holds the shaft packing against the shoulder of the stuffing
box
b. assists in reducing shaft vibration
c. distributes sealing fluid to the stuffing box
d. prevents fluid from leaking out of the pump casing Correct
Answers c
A centrifugal pump consists of:
Select one:
a. A pulsating disc
b. Sliding vanes
c. Gears rotating in a housing
d. An impeller surrounded by a casing Correct Answers An
impeller surrounded by a casing
A centrifugal pump consists of:
Select one:
a. A pulsating disc
b. Sliding vanes
c. Gears rotating in a housing
d. An impeller surrounded by a casing Correct Answers d
A check valve placed at the terminus of a suction line to prevent
reverse flow is called a:
Select one:
a. stop valve
,b. foot valve
c. bottoming valve
d. prime valve Correct Answers b
A circulating pump, known as a cooling water pump,is usually:
Select one:
a. A small capacity pump
b. A once-through device
c. A reciprocating pump
d. Connected with some type of heat exchanger system Correct
Answers Connected with some type of heat exchanger system
A circulating pump, known as a cooling water pump,is usually:
Select one:
a. A small capacity pump
b. A once-through device
c. A reciprocating pump
d. Connected with some type of heat exchanger system Correct
Answers d
A compressor that has flow along the shaft of the compressor is
considered to be:
Select one:
a. an axial flow compressor
b. an offset flow compressor
c. a radial flow compressor
d. a diffused flow compressor Correct Answers a
A device that connects two shafts mechanically and transmits
power from one shaft to another is called a:
Select one:
,a. coupling
b. connector
c. fastener
d. clamp Correct Answers a
A diffuser pump:
Select one:
a. does not have a volute
b. does not have to be primed
c. has high suction lift
d. is more effective at changing velocity to pressure than a
volute pump Correct Answers d
A diffuser pump:
Select one:
a. is more effective at changing velocity to pressure than a
volute pump
b. Has high suction lift
c. Does not have a volute
d. Does not have to be primed Correct Answers a
A diffuser pump:
Select one:
a. is more effective at changing velocity to pressure than a
volute pump
b. Has high suction lift
c. Does not have a volute
d. Does not have to be primed Correct Answers is more
effective at changing velocity to pressure than a volute pump
A double-acting pump:
, Select one:
a. Is a positive displacement pump
b. Has two slide valves
c. Has two pistons on the driver end
d. Has two pistons on the pump end Correct Answers a
A double-acting pump:
Select one:
a. Is a positive displacement pump
b. Has two slide valves
c. Has two pistons on the driver end
d. Has two pistons on the pump end Correct Answers Is a
positive displacement pump
A drop in suction pressure, after starting a pump for the first
time, is an indication of:
Select one:
a. a faulty pump
b. a faulty foot valve
c. a plugged strainer
d. improper rotation Correct Answers c
A inspection of a pump that is in operation should include:
Select one:
a. ensuring water flows freely from the packing
b. ensuring water drips from the mechanical seals
c. checking that the suction and discharge pressures are correct
d. re-priming the pump Correct Answers c
A inspection of a pump that is in operation should include:
Select one:
