CT Geothermal HVAC Contractor Exam
Questions and Correct Answers (Verified
Answers) Plus Rationale 2027 Q&A|
Instant Download Pdf
1. What is the primary purpose of a geothermal heat pump ground
loop?
A. To generate electricity from groundwater
B. To provide a constant source of combustion air
C. To exchange heat with the earth
D. To increase refrigerant pressure
Answer: C. To exchange heat with the earth
Rationale: A geothermal heat pump uses the relatively stable
temperature of the earth as a heat source in heating mode and a heat
sink in cooling mode. The ground loop transfers thermal energy
between the building and the earth.
, 2. Which type of geothermal system uses buried piping containing a
water-based fluid to exchange heat with the ground?
A. Direct-expansion system
B. Closed-loop system
C. Cooling-tower system
D. Combustion-loop system
Answer: B. Closed-loop system
Rationale: A closed-loop geothermal system circulates a heat-transfer
fluid through buried piping. The fluid repeatedly moves through the
loop and exchanges heat with the surrounding soil or rock without
normally being discharged into the environment.
3. In a geothermal heat pump operating in heating mode, the
ground generally serves as the:
A. Heat sink
B. Heat source
C. Condenser fan
D. Refrigerant receiver
Answer: B. Heat source
Rationale: During heating operation, the heat pump extracts thermal
energy from the ground and transfers it indoors. Therefore, the earth
,acts as the heat source while the indoor coil releases heat into the
building.
4. What is the main advantage of the relatively stable underground
temperature used by geothermal systems?
A. It eliminates the need for refrigerant
B. It provides a more consistent heat-exchange environment
C. It guarantees unlimited heating capacity
D. It prevents all compressor wear
Answer: B. It provides a more consistent heat-exchange environment
Rationale: Ground temperatures vary less than outdoor air
temperatures over normal seasonal cycles. This stability allows
geothermal heat pumps to operate under relatively predictable
entering-water conditions and can improve efficiency compared with
systems relying entirely on outdoor air.
5. Which component circulates heat-transfer fluid through a closed
geothermal loop?
A. Expansion valve
B. Circulating pump
C. Compressor
D. Condenser fan
, Answer: B. Circulating pump
Rationale: The circulation pump moves water or antifreeze solution
through the buried ground loop and heat exchanger. The compressor,
by contrast, circulates refrigerant within the refrigeration circuit.
6. Which geothermal configuration typically uses water from a well
as the heat-exchange medium and then discharges or returns the
water?
A. Open-loop system
B. Closed horizontal loop
C. Closed vertical loop
D. Direct refrigerant loop
Answer: A. Open-loop system
Rationale: Open-loop systems use groundwater as the heat-transfer
medium. Water is pumped from a suitable well or water source
through the heat exchanger and is then discharged or returned
according to applicable requirements.
7. A horizontal closed-loop geothermal system is generally most
practical when a property has:
A. Extremely limited ground area
B. Adequate land available for trenching
Questions and Correct Answers (Verified
Answers) Plus Rationale 2027 Q&A|
Instant Download Pdf
1. What is the primary purpose of a geothermal heat pump ground
loop?
A. To generate electricity from groundwater
B. To provide a constant source of combustion air
C. To exchange heat with the earth
D. To increase refrigerant pressure
Answer: C. To exchange heat with the earth
Rationale: A geothermal heat pump uses the relatively stable
temperature of the earth as a heat source in heating mode and a heat
sink in cooling mode. The ground loop transfers thermal energy
between the building and the earth.
, 2. Which type of geothermal system uses buried piping containing a
water-based fluid to exchange heat with the ground?
A. Direct-expansion system
B. Closed-loop system
C. Cooling-tower system
D. Combustion-loop system
Answer: B. Closed-loop system
Rationale: A closed-loop geothermal system circulates a heat-transfer
fluid through buried piping. The fluid repeatedly moves through the
loop and exchanges heat with the surrounding soil or rock without
normally being discharged into the environment.
3. In a geothermal heat pump operating in heating mode, the
ground generally serves as the:
A. Heat sink
B. Heat source
C. Condenser fan
D. Refrigerant receiver
Answer: B. Heat source
Rationale: During heating operation, the heat pump extracts thermal
energy from the ground and transfers it indoors. Therefore, the earth
,acts as the heat source while the indoor coil releases heat into the
building.
4. What is the main advantage of the relatively stable underground
temperature used by geothermal systems?
A. It eliminates the need for refrigerant
B. It provides a more consistent heat-exchange environment
C. It guarantees unlimited heating capacity
D. It prevents all compressor wear
Answer: B. It provides a more consistent heat-exchange environment
Rationale: Ground temperatures vary less than outdoor air
temperatures over normal seasonal cycles. This stability allows
geothermal heat pumps to operate under relatively predictable
entering-water conditions and can improve efficiency compared with
systems relying entirely on outdoor air.
5. Which component circulates heat-transfer fluid through a closed
geothermal loop?
A. Expansion valve
B. Circulating pump
C. Compressor
D. Condenser fan
, Answer: B. Circulating pump
Rationale: The circulation pump moves water or antifreeze solution
through the buried ground loop and heat exchanger. The compressor,
by contrast, circulates refrigerant within the refrigeration circuit.
6. Which geothermal configuration typically uses water from a well
as the heat-exchange medium and then discharges or returns the
water?
A. Open-loop system
B. Closed horizontal loop
C. Closed vertical loop
D. Direct refrigerant loop
Answer: A. Open-loop system
Rationale: Open-loop systems use groundwater as the heat-transfer
medium. Water is pumped from a suitable well or water source
through the heat exchanger and is then discharged or returned
according to applicable requirements.
7. A horizontal closed-loop geothermal system is generally most
practical when a property has:
A. Extremely limited ground area
B. Adequate land available for trenching
