Power Engineering - 4B2 Practice Questions and Answers Rated A
When a reciprocating pump delivers fluid every second
stroke of its piston, it is called a pump:
a. Positive displacement b. Single acting
b. Single acting
c. Two-stage
d. Double acting
When a pump discharges into a vessel operating at 300
kPa, the 300 kPa is referred to as:
a. Dynamic head b. Pressure head
b. Pressure head
c. Discharge head
d. Friction head
A reciprocating air compressor works on the principle of:
a. Pressure reduction
d. Volume reduction
b. Centrifugal force
c. Volumetric expansion
d. Volume reduction
A volute type pump:
a. Is a positive displacement pump
b. Has a spiral casing with an increasing cross sectional
b. Has a spiral casing with an increasing cross sectional
area.
area.
c. Reduces the velocity in the discharge nozzle
d. Is a regenerative type pump
A dittuser pump:
d. Is more ettective at changing velocity to pressure than
a. Does not have a volute a volute pump
b. Does not have to be primed
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, Power Engineering - 4B2 Practice Questions and Answers Rated A
c. Has high suction lift
d. Is more ettective at changing velocity to pressure than
a volute pump
Positive displacement compressors:
a. Cannot deliver pulsation-free air
d. Could be single stage with three cylinders
b. Must have suction and discharge valves
c. Must all use internal lubrication
d. Could be single stage with three cylinders
Compressed air tools tend to be:
a. Heavier than equivalent electrical tools
d. More expensive than electrical tools
b. Damaged by overloading
c. Hot after prolonged operation
d. More expensive than electrical tools
The compressor that would favour volume over pressure
would be the:
a. Rotary lobe c. Centrifugal
b. Screw
c. Centrifugal
d. Sliding vane
Which type of pump produces the greatest suction?
a. A volute centrifugal pump
d. A positive displacement pump
b. A centrifugal pump
c. A regenerative pump
d. A positive displacement pump
Which of the following air compressors gives two com-
pression strokes per crankshaft revolution?
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When a reciprocating pump delivers fluid every second
stroke of its piston, it is called a pump:
a. Positive displacement b. Single acting
b. Single acting
c. Two-stage
d. Double acting
When a pump discharges into a vessel operating at 300
kPa, the 300 kPa is referred to as:
a. Dynamic head b. Pressure head
b. Pressure head
c. Discharge head
d. Friction head
A reciprocating air compressor works on the principle of:
a. Pressure reduction
d. Volume reduction
b. Centrifugal force
c. Volumetric expansion
d. Volume reduction
A volute type pump:
a. Is a positive displacement pump
b. Has a spiral casing with an increasing cross sectional
b. Has a spiral casing with an increasing cross sectional
area.
area.
c. Reduces the velocity in the discharge nozzle
d. Is a regenerative type pump
A dittuser pump:
d. Is more ettective at changing velocity to pressure than
a. Does not have a volute a volute pump
b. Does not have to be primed
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, Power Engineering - 4B2 Practice Questions and Answers Rated A
c. Has high suction lift
d. Is more ettective at changing velocity to pressure than
a volute pump
Positive displacement compressors:
a. Cannot deliver pulsation-free air
d. Could be single stage with three cylinders
b. Must have suction and discharge valves
c. Must all use internal lubrication
d. Could be single stage with three cylinders
Compressed air tools tend to be:
a. Heavier than equivalent electrical tools
d. More expensive than electrical tools
b. Damaged by overloading
c. Hot after prolonged operation
d. More expensive than electrical tools
The compressor that would favour volume over pressure
would be the:
a. Rotary lobe c. Centrifugal
b. Screw
c. Centrifugal
d. Sliding vane
Which type of pump produces the greatest suction?
a. A volute centrifugal pump
d. A positive displacement pump
b. A centrifugal pump
c. A regenerative pump
d. A positive displacement pump
Which of the following air compressors gives two com-
pression strokes per crankshaft revolution?
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