CO GEOTHERMAL CONTRACTOR EXAM QUESTIONS
AND CORRECT ANSWERS (VERIFIED ANSWERS)
Q&A 2027 |INSTANT DOWNLAOD PDF
1. What is the primary purpose of a geothermal heat pump?
A. Generate electricity from groundwater
B. Transfer heat between a building and the ground
C. Convert natural gas into heat
D. Produce steam for heating
Answer: B. Transfer heat between a building and the ground
Rationale: A geothermal heat pump transfers thermal energy
between the building and the relatively stable temperature of
the earth.
2. Which component transfers heat between the refrigerant
and the ground-loop fluid?
A. Compressor
B. Ground heat exchanger
C. Thermostat
D. Blower motor
Answer: B. Ground heat exchanger
Rationale: The ground heat exchanger allows heat to move
between the circulating loop fluid and the surrounding earth.
3. In heating mode, a geothermal heat pump generally
extracts heat from the:
,A. Outdoor air only
B. Ground or groundwater source
C. Electrical panel
D. Refrigerant accumulator
Answer: B. Ground or groundwater source
Rationale: The system absorbs available ground-source heat
and upgrades it to a useful temperature.
4. Which refrigerant-side component raises refrigerant
pressure and temperature?
A. Expansion valve
B. Evaporator
C. Compressor
D. Receiver
Answer: C. Compressor
Rationale: Compression increases refrigerant pressure and
normally increases its temperature.
5. What is the main function of an expansion device?
A. Increase refrigerant pressure
B. Reduce refrigerant pressure
C. Increase compressor speed
D. Remove electrical current
Answer: B. Reduce refrigerant pressure
Rationale: The expansion device creates a pressure drop that
allows the refrigerant to evaporate at a lower temperature.
,6. Which loop arrangement circulates fluid through buried
piping and returns it to the heat pump?
A. Closed loop
B. Open combustion loop
C. Exhaust loop
D. Condensate loop
Answer: A. Closed loop
Rationale: Closed-loop systems continuously circulate a heat-
transfer fluid through sealed underground piping.
7. A horizontal geothermal loop is most commonly installed:
A. Inside the building attic
B. In trenches
C. Inside the compressor shell
D. On a roof
Answer: B. In trenches
Rationale: Horizontal systems use buried trenches to provide
sufficient pipe length for heat exchange.
8. What is a major advantage of a vertical ground loop?
A. It requires no drilling
B. It can reduce required surface area
C. It eliminates the need for circulation
D. It always costs less than horizontal loops
Answer: B. It can reduce required surface area
Rationale: Vertical boreholes allow substantial loop length
where available land area is limited.
, 9. What material is commonly used for buried geothermal
loop piping?
A. PVC electrical conduit
B. High-density polyethylene
C. Cast iron
D. Galvanized sheet metal
Answer: B. High-density polyethylene
Rationale: HDPE is widely used because of its durability,
flexibility, corrosion resistance, and suitability for underground
applications.
10. What type of joining method is commonly used for HDPE
geothermal pipe?
A. Soft soldering
B. Fusion welding
C. Thread cutting
D. Riveting
Answer: B. Fusion welding
Rationale: Heat fusion creates a strong, continuous joint in
properly prepared HDPE piping.
11. What is the purpose of pressure testing a ground loop?
A. Increase loop temperature
B. Verify piping integrity and identify leaks
C. Increase refrigerant pressure
D. Adjust thermostat settings
AND CORRECT ANSWERS (VERIFIED ANSWERS)
Q&A 2027 |INSTANT DOWNLAOD PDF
1. What is the primary purpose of a geothermal heat pump?
A. Generate electricity from groundwater
B. Transfer heat between a building and the ground
C. Convert natural gas into heat
D. Produce steam for heating
Answer: B. Transfer heat between a building and the ground
Rationale: A geothermal heat pump transfers thermal energy
between the building and the relatively stable temperature of
the earth.
2. Which component transfers heat between the refrigerant
and the ground-loop fluid?
A. Compressor
B. Ground heat exchanger
C. Thermostat
D. Blower motor
Answer: B. Ground heat exchanger
Rationale: The ground heat exchanger allows heat to move
between the circulating loop fluid and the surrounding earth.
3. In heating mode, a geothermal heat pump generally
extracts heat from the:
,A. Outdoor air only
B. Ground or groundwater source
C. Electrical panel
D. Refrigerant accumulator
Answer: B. Ground or groundwater source
Rationale: The system absorbs available ground-source heat
and upgrades it to a useful temperature.
4. Which refrigerant-side component raises refrigerant
pressure and temperature?
A. Expansion valve
B. Evaporator
C. Compressor
D. Receiver
Answer: C. Compressor
Rationale: Compression increases refrigerant pressure and
normally increases its temperature.
5. What is the main function of an expansion device?
A. Increase refrigerant pressure
B. Reduce refrigerant pressure
C. Increase compressor speed
D. Remove electrical current
Answer: B. Reduce refrigerant pressure
Rationale: The expansion device creates a pressure drop that
allows the refrigerant to evaporate at a lower temperature.
,6. Which loop arrangement circulates fluid through buried
piping and returns it to the heat pump?
A. Closed loop
B. Open combustion loop
C. Exhaust loop
D. Condensate loop
Answer: A. Closed loop
Rationale: Closed-loop systems continuously circulate a heat-
transfer fluid through sealed underground piping.
7. A horizontal geothermal loop is most commonly installed:
A. Inside the building attic
B. In trenches
C. Inside the compressor shell
D. On a roof
Answer: B. In trenches
Rationale: Horizontal systems use buried trenches to provide
sufficient pipe length for heat exchange.
8. What is a major advantage of a vertical ground loop?
A. It requires no drilling
B. It can reduce required surface area
C. It eliminates the need for circulation
D. It always costs less than horizontal loops
Answer: B. It can reduce required surface area
Rationale: Vertical boreholes allow substantial loop length
where available land area is limited.
, 9. What material is commonly used for buried geothermal
loop piping?
A. PVC electrical conduit
B. High-density polyethylene
C. Cast iron
D. Galvanized sheet metal
Answer: B. High-density polyethylene
Rationale: HDPE is widely used because of its durability,
flexibility, corrosion resistance, and suitability for underground
applications.
10. What type of joining method is commonly used for HDPE
geothermal pipe?
A. Soft soldering
B. Fusion welding
C. Thread cutting
D. Riveting
Answer: B. Fusion welding
Rationale: Heat fusion creates a strong, continuous joint in
properly prepared HDPE piping.
11. What is the purpose of pressure testing a ground loop?
A. Increase loop temperature
B. Verify piping integrity and identify leaks
C. Increase refrigerant pressure
D. Adjust thermostat settings
