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HVAC Journeyman Exam Practice Questions (100 Questions)
Section 1: HVAC Theory & Fundamentals (Questions 1–25)
1. What is the primary function of a comfort air conditioning system?
A. To heat water
B. To maintain space conditions by controlling temperature and humidity
C. To circulate steam
D. To control refrigerant pressure only
Answer: B
2. Heat which causes a change in temperature of a substance is called:
A. Latent heat
B. Sensible heat
C. Specific heat
D. Enthalpy
Answer: B
3. Heat added to a substance without a rise in temperature (e.g., liquid refrigerant to gas)
is called:
A. Sensible heat
B. Latent heat
C. Specific heat
D. Enthalpy
Answer: B
4. What is the standard unit for measuring the quantity of heat in a substance?
A. Watt
B. British Thermal Unit (BTU)
C. Joule
D. Calorie
Answer: B
5. How many BTUs are in 1 ton of refrigeration?
A. 1,200 BTUs
B. 12,000 BTUs
C. 120,000 BTUs
D. 1,200,000 BTUs
Answer: B
6. 1 watt is equal to how many BTUs per hour?
A. 1.5
B. 2.5
C. 3.41
, 2
D. 4.5
Answer: C
7. The specific heat of air is:
A. 0.12 BTU/Lb/F
B. 0.24 BTU/Lb/F
C. 0.48 BTU/Lb/F
D. 1.0 BTU/Lb/F
Answer: B
8. Enthalpy is defined as:
A. The measure of heat content of a substance
B. The measure of pressure in a system
C. The measure of airflow velocity
D. The measure of electrical resistance
Answer: A
9. The movement of heat through a solid object is called:
A. Convection
B. Radiation
C. Conduction
D. Advection
Answer: C
10. The movement of heat by way of fluid is called:
A. Conduction
B. Convection
C. Radiation
D. Induction
Answer: B
11. What is the temperature at which moisture will start to condense from the air called?
A. Wet bulb temperature
B. Dry bulb temperature
C. Dew point temperature
D. Saturation temperature
Answer: C
12. Zero psig (pounds per square inch gauge) is the same as:
A. Zero psia
B. Atmospheric pressure
C. Absolute zero
D. 14.7 psia
Answer: B
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13. The state of refrigerant in the suction line should be:
A. High pressure/high temperature liquid
B. Low pressure/low temperature vapor
C. High pressure/low temperature liquid
D. Low pressure/high temperature vapor
Answer: B
14. Why must refrigerant in the suction line be slightly warmer than saturation
temperature?
A. To increase system capacity
B. To prevent liquid slugging of the compressor
C. To reduce pressure drop
D. To improve condenser efficiency
Answer: B
15. The state of refrigerant entering the condenser is:
A. Low pressure/low temperature vapor
B. High pressure/highly superheated vapor
C. High pressure/low temperature liquid
D. Low pressure/high temperature liquid
Answer: B
16. The sequential order of steps in the vapor-compression process is:
A. Compression, condensation, expansion, vaporization
B. Condensation, compression, vaporization, expansion
C. Vaporization, compression, condensation, expansion
D. Expansion, vaporization, compression, condensation
Answer: A
17. What is the recommended relative humidity for a home?
A. 10% to 30%
B. 40% to 60%
C. 70% to 90%
D. 20% to 40%
Answer: B
18. Which of the following is NOT a thermodynamic property of refrigerant?
A. Pressure
B. Temperature
C. Flammability
D. Enthalpy
Answer: C
HVAC Journeyman Exam Practice Questions (100 Questions)
Section 1: HVAC Theory & Fundamentals (Questions 1–25)
1. What is the primary function of a comfort air conditioning system?
A. To heat water
B. To maintain space conditions by controlling temperature and humidity
C. To circulate steam
D. To control refrigerant pressure only
Answer: B
2. Heat which causes a change in temperature of a substance is called:
A. Latent heat
B. Sensible heat
C. Specific heat
D. Enthalpy
Answer: B
3. Heat added to a substance without a rise in temperature (e.g., liquid refrigerant to gas)
is called:
A. Sensible heat
B. Latent heat
C. Specific heat
D. Enthalpy
Answer: B
4. What is the standard unit for measuring the quantity of heat in a substance?
A. Watt
B. British Thermal Unit (BTU)
C. Joule
D. Calorie
Answer: B
5. How many BTUs are in 1 ton of refrigeration?
A. 1,200 BTUs
B. 12,000 BTUs
C. 120,000 BTUs
D. 1,200,000 BTUs
Answer: B
6. 1 watt is equal to how many BTUs per hour?
A. 1.5
B. 2.5
C. 3.41
, 2
D. 4.5
Answer: C
7. The specific heat of air is:
A. 0.12 BTU/Lb/F
B. 0.24 BTU/Lb/F
C. 0.48 BTU/Lb/F
D. 1.0 BTU/Lb/F
Answer: B
8. Enthalpy is defined as:
A. The measure of heat content of a substance
B. The measure of pressure in a system
C. The measure of airflow velocity
D. The measure of electrical resistance
Answer: A
9. The movement of heat through a solid object is called:
A. Convection
B. Radiation
C. Conduction
D. Advection
Answer: C
10. The movement of heat by way of fluid is called:
A. Conduction
B. Convection
C. Radiation
D. Induction
Answer: B
11. What is the temperature at which moisture will start to condense from the air called?
A. Wet bulb temperature
B. Dry bulb temperature
C. Dew point temperature
D. Saturation temperature
Answer: C
12. Zero psig (pounds per square inch gauge) is the same as:
A. Zero psia
B. Atmospheric pressure
C. Absolute zero
D. 14.7 psia
Answer: B
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13. The state of refrigerant in the suction line should be:
A. High pressure/high temperature liquid
B. Low pressure/low temperature vapor
C. High pressure/low temperature liquid
D. Low pressure/high temperature vapor
Answer: B
14. Why must refrigerant in the suction line be slightly warmer than saturation
temperature?
A. To increase system capacity
B. To prevent liquid slugging of the compressor
C. To reduce pressure drop
D. To improve condenser efficiency
Answer: B
15. The state of refrigerant entering the condenser is:
A. Low pressure/low temperature vapor
B. High pressure/highly superheated vapor
C. High pressure/low temperature liquid
D. Low pressure/high temperature liquid
Answer: B
16. The sequential order of steps in the vapor-compression process is:
A. Compression, condensation, expansion, vaporization
B. Condensation, compression, vaporization, expansion
C. Vaporization, compression, condensation, expansion
D. Expansion, vaporization, compression, condensation
Answer: A
17. What is the recommended relative humidity for a home?
A. 10% to 30%
B. 40% to 60%
C. 70% to 90%
D. 20% to 40%
Answer: B
18. Which of the following is NOT a thermodynamic property of refrigerant?
A. Pressure
B. Temperature
C. Flammability
D. Enthalpy
Answer: C
