South Carolina Geothermal Installer
Certification License Exam Practice
Questions And Correct Answers
(Verified Answers) Plus Rationale 2026
Q&A| Instant Download Pdf
1. The primary purpose of a geothermal heat pump system is to:
A. Generate electricity
B. Provide heating and cooling by transferring heat with the ground
C. Replace the need for ductwork
D. Increase the ambient outdoor temperature
A geothermal heat pump uses the earth’s relatively constant
temperature to exchange heat for indoor heating and cooling, not to
generate electricity.
2. In a closed-loop geothermal system, heat exchange occurs through:
A. Air convection
B. Solar radiation
C. Circulating fluid in buried piping
D. Electrical resistance coils
Closed-loop systems exchange heat between the circulating fluid and
the earth via buried pipes.
3. Which fluid is most commonly used in a closed-loop geothermal
ground loop?
A. Pure petroleum
B. Liquid nitrogen
C. Water with antifreeze
D. Compressed air
, Water with antifreeze is used for efficient heat transfer and freeze
protection in ground loops.
4. The optimum depth for a vertical geothermal borehole is typically:
A. 5–10 feet
B. 20–30 feet
C. 50–75 feet
D. 150–400+ feet
Vertical loops are drilled deep to access stable ground temperatures
and efficient heat transfer.
5. The term “Coefficient of Performance (COP)” refers to:
A. Environmental compliance rating
B. Heat pump efficiency ratio
C. Soil conductivity
D. Compressor displacement
COP measures the efficiency of a heat pump by comparing output
heat to input energy.
6. When designing a geothermal system, “thermal conductivity” of soil
affects:
A. Groundwater speed only
B. Air filtration
C. Heat transfer capacity of the ground
D. Electrical consumption exclusively
Soil thermal conductivity determines how effectively heat transfers
between the loop and earth.
7. A loop field designed with horizontal piping is generally best suited
for:
A. Mountain terrain
B. Large land areas with shallow loop trenches
C. Urban rooftops
D. High-rise buildings
Horizontal loops are installed in trenches and require significant land
area.
8. In geothermal installation, proper grout around borehole loops is used
to:
A. Lubricate the drill bit
, B. Prevent soil erosion
C. Ensure thermal contact with the ground
D. Provide electrical grounding
Grout improves heat transfer and prevents fluid contamination
between strata.
9. The refrigerant in a geothermal heat pump is used to:
A. Absorb solar energy
B. Transfer heat between indoor coils and the ground loop
C. Provide potable water cooling
D. Insulate the system
Refrigerant cycles heat within the heat pump between the ground
loop and the air/water distribution system.
10. A geothermal heat pump’s reversing valve allows the system to:
A. Change fan speeds
B. Switch between heating and cooling modes
C. Adjust loop fluid viscosity
D. Increase ground loop pressure
The reversing valve changes refrigerant flow direction to alternate
heating and cooling.
11. What is the minimum distance typically required between
vertical boreholes?
A. 1 foot
B. 10 feet
C. 15–20 feet
D. 100 feet
Proper spacing prevents thermal interference between boreholes.
12. In geothermal loop installation, tracer wire is installed to:
A. Increase heat transfer
B. Locate buried piping later
C. Provide chemical resistance
D. Regulate fluid flow
Tracer wire enables future detection of buried loops.
13. A key advantage of geothermal systems over air-source heat
pumps is:
A. Lower ground costs
Certification License Exam Practice
Questions And Correct Answers
(Verified Answers) Plus Rationale 2026
Q&A| Instant Download Pdf
1. The primary purpose of a geothermal heat pump system is to:
A. Generate electricity
B. Provide heating and cooling by transferring heat with the ground
C. Replace the need for ductwork
D. Increase the ambient outdoor temperature
A geothermal heat pump uses the earth’s relatively constant
temperature to exchange heat for indoor heating and cooling, not to
generate electricity.
2. In a closed-loop geothermal system, heat exchange occurs through:
A. Air convection
B. Solar radiation
C. Circulating fluid in buried piping
D. Electrical resistance coils
Closed-loop systems exchange heat between the circulating fluid and
the earth via buried pipes.
3. Which fluid is most commonly used in a closed-loop geothermal
ground loop?
A. Pure petroleum
B. Liquid nitrogen
C. Water with antifreeze
D. Compressed air
, Water with antifreeze is used for efficient heat transfer and freeze
protection in ground loops.
4. The optimum depth for a vertical geothermal borehole is typically:
A. 5–10 feet
B. 20–30 feet
C. 50–75 feet
D. 150–400+ feet
Vertical loops are drilled deep to access stable ground temperatures
and efficient heat transfer.
5. The term “Coefficient of Performance (COP)” refers to:
A. Environmental compliance rating
B. Heat pump efficiency ratio
C. Soil conductivity
D. Compressor displacement
COP measures the efficiency of a heat pump by comparing output
heat to input energy.
6. When designing a geothermal system, “thermal conductivity” of soil
affects:
A. Groundwater speed only
B. Air filtration
C. Heat transfer capacity of the ground
D. Electrical consumption exclusively
Soil thermal conductivity determines how effectively heat transfers
between the loop and earth.
7. A loop field designed with horizontal piping is generally best suited
for:
A. Mountain terrain
B. Large land areas with shallow loop trenches
C. Urban rooftops
D. High-rise buildings
Horizontal loops are installed in trenches and require significant land
area.
8. In geothermal installation, proper grout around borehole loops is used
to:
A. Lubricate the drill bit
, B. Prevent soil erosion
C. Ensure thermal contact with the ground
D. Provide electrical grounding
Grout improves heat transfer and prevents fluid contamination
between strata.
9. The refrigerant in a geothermal heat pump is used to:
A. Absorb solar energy
B. Transfer heat between indoor coils and the ground loop
C. Provide potable water cooling
D. Insulate the system
Refrigerant cycles heat within the heat pump between the ground
loop and the air/water distribution system.
10. A geothermal heat pump’s reversing valve allows the system to:
A. Change fan speeds
B. Switch between heating and cooling modes
C. Adjust loop fluid viscosity
D. Increase ground loop pressure
The reversing valve changes refrigerant flow direction to alternate
heating and cooling.
11. What is the minimum distance typically required between
vertical boreholes?
A. 1 foot
B. 10 feet
C. 15–20 feet
D. 100 feet
Proper spacing prevents thermal interference between boreholes.
12. In geothermal loop installation, tracer wire is installed to:
A. Increase heat transfer
B. Locate buried piping later
C. Provide chemical resistance
D. Regulate fluid flow
Tracer wire enables future detection of buried loops.
13. A key advantage of geothermal systems over air-source heat
pumps is:
A. Lower ground costs
