AR PI Pump Installer Contractor Exam
Practice Questions And Correct Answers
(Verified Answers) Plus Rationales 2027
Q&A | Instant Download Pdf
1. What is the primary purpose of a pump in a water system?
A. To increase water temperature
B. To move water and provide the required flow and pressure
C. To remove dissolved minerals
D. To reduce pipe diameter
Answer: B. To move water and provide the required flow and pressure
Rationale: A pump converts mechanical energy into hydraulic energy to
move water through piping and overcome required elevation and friction
losses.
2. Which pump type is commonly used for residential well-water
systems?
A. Centrifugal surface pump
, B. Reciprocating air compressor
C. Rotary kiln
D. Hydraulic ram only
Answer: A. Centrifugal surface pump
Rationale: Centrifugal pumps are widely used for shallow-well and other
surface pumping applications, although submersible pumps are common
for deeper wells.
3. What does pump head represent?
A. Pipe diameter
B. The height or energy equivalent the pump must overcome
C. Motor horsepower only
D. Pump weight
Answer: B. The height or energy equivalent the pump must overcome
Rationale: Pump head expresses energy per unit weight of fluid and
includes elevation, pressure, and friction components.
4. What is cavitation?
A. Electrical short circuit
B. Formation and collapse of vapor bubbles within the pump
C. Excessive pipe insulation
D. Water freezing inside a tank
,Answer: B. Formation and collapse of vapor bubbles within the pump
Rationale: Cavitation occurs when local pressure falls below the liquid's
vapor pressure, producing bubbles that can damage pump components
and reduce performance.
5. Which condition can contribute to pump cavitation?
A. Adequate suction pressure
B. Excessive suction lift
C. Properly sized suction piping
D. Correct operating temperature
Answer: B. Excessive suction lift
Rationale: Excessive suction lift lowers available suction pressure and can
cause the pressure at the pump inlet to fall below the fluid vapor pressure.
6. What does GPM mean?
A. Gallons per minute
B. Gallons per meter
C. Grains per minute
D. Gauge pressure measurement
Answer: A. Gallons per minute
Rationale: GPM is the standard abbreviation for gallons per minute and is
commonly used to express pump flow rate.
, 7. Which component prevents water from flowing backward through a
pump system?
A. Check valve
B. Pressure gauge
C. Union
D. Drain plug
Answer: A. Check valve
Rationale: A check valve permits flow in one direction and closes when
reverse flow occurs.
8. What is the purpose of a pressure tank in a typical water-pressure
system?
A. To heat water
B. To reduce pump cycling
C. To filter all sediment
D. To increase pipe diameter
Answer: B. To reduce pump cycling
Rationale: A pressure tank stores pressurized water so the pump does not
need to start every time a small amount of water is used.
9. What device commonly controls when a well pump starts and stops?
A. Pressure switch
Practice Questions And Correct Answers
(Verified Answers) Plus Rationales 2027
Q&A | Instant Download Pdf
1. What is the primary purpose of a pump in a water system?
A. To increase water temperature
B. To move water and provide the required flow and pressure
C. To remove dissolved minerals
D. To reduce pipe diameter
Answer: B. To move water and provide the required flow and pressure
Rationale: A pump converts mechanical energy into hydraulic energy to
move water through piping and overcome required elevation and friction
losses.
2. Which pump type is commonly used for residential well-water
systems?
A. Centrifugal surface pump
, B. Reciprocating air compressor
C. Rotary kiln
D. Hydraulic ram only
Answer: A. Centrifugal surface pump
Rationale: Centrifugal pumps are widely used for shallow-well and other
surface pumping applications, although submersible pumps are common
for deeper wells.
3. What does pump head represent?
A. Pipe diameter
B. The height or energy equivalent the pump must overcome
C. Motor horsepower only
D. Pump weight
Answer: B. The height or energy equivalent the pump must overcome
Rationale: Pump head expresses energy per unit weight of fluid and
includes elevation, pressure, and friction components.
4. What is cavitation?
A. Electrical short circuit
B. Formation and collapse of vapor bubbles within the pump
C. Excessive pipe insulation
D. Water freezing inside a tank
,Answer: B. Formation and collapse of vapor bubbles within the pump
Rationale: Cavitation occurs when local pressure falls below the liquid's
vapor pressure, producing bubbles that can damage pump components
and reduce performance.
5. Which condition can contribute to pump cavitation?
A. Adequate suction pressure
B. Excessive suction lift
C. Properly sized suction piping
D. Correct operating temperature
Answer: B. Excessive suction lift
Rationale: Excessive suction lift lowers available suction pressure and can
cause the pressure at the pump inlet to fall below the fluid vapor pressure.
6. What does GPM mean?
A. Gallons per minute
B. Gallons per meter
C. Grains per minute
D. Gauge pressure measurement
Answer: A. Gallons per minute
Rationale: GPM is the standard abbreviation for gallons per minute and is
commonly used to express pump flow rate.
, 7. Which component prevents water from flowing backward through a
pump system?
A. Check valve
B. Pressure gauge
C. Union
D. Drain plug
Answer: A. Check valve
Rationale: A check valve permits flow in one direction and closes when
reverse flow occurs.
8. What is the purpose of a pressure tank in a typical water-pressure
system?
A. To heat water
B. To reduce pump cycling
C. To filter all sediment
D. To increase pipe diameter
Answer: B. To reduce pump cycling
Rationale: A pressure tank stores pressurized water so the pump does not
need to start every time a small amount of water is used.
9. What device commonly controls when a well pump starts and stops?
A. Pressure switch
