Question 1: An evaporative cooling method cools the indoor air by lowering its wet bulb temperature and by increasing its dry bulb temperature.
- True
- False
HVAC
NEC 2023
HVAC Air Conditioning Practice Test 3
Take a Free Practice Test on HVAC Air Conditioning -3
TOPICS COVERED
HVAC Practice tests
How this test works
Read each question carefully
Look for absolute words like always / never — they often distinguish the right answer.
Manage your time
You have 15 min for 10 questions. Skip tough ones and come back.
Progress is auto-saved
Your answers are saved locally — a page refresh won't lose your work.
Review your answers
After submitting you'll see every explanation and your NEC references.
Frequently Asked Questions
Yes — completely free with no signup required.
HVAC electrical exams cover electrical theory (Ohm's Law, circuits), transformers, single-phase and three-phase motors, control wiring, safety, and troubleshooting.
Requirements vary by state. HVAC technicians typically need EPA 608 certification and may need a separate electrical license for line voltage work.
10
Questions
15 min
Time
70%
Pass
Timer starts immediately. Progress is auto-saved.
0
Correct0
Wrong0s
TimeHVAC Air Conditioning Practice Test 3 — Question List
Question 2: What should be temperature range of water used for cold-water coil cooling method?
- 35<sup>0</sup> F to 55<sup>0</sup>F
- 40<sup>0</sup> F to 65<sup>0</sup>F
- 15<sup>0</sup> F to 25<sup>0</sup>F
- 10<sup>0</sup> F to 45<sup>0</sup>F
Question 3: Which of the following is the primary purpose of the compressor in refrigeration system?
- Establishing a pressure difference in the system
- Increasing the refrigerant flow in the system
- Increasing the temperature of the refrigerant at inlet of condenser
- To pump the refrigerant the refrigerant throughout the system
Question 4: If the system head increases, the fan need …………. horse power to pump air through the system.
- High
- Low
Question 5: What should be air velocity in the air ducts to minimize the effect of frictional losses?
- High
- Low
- Moderate
Question 6: Brake hose power on the fan motor varies as directly ………….. of the fan rpm ratio.
- Cube
- Square
- Quadruple
Question 7: A ton of refrigeration is equal to …………
- 1800 Btu per hour
- 1200 Btu per hour
- 1500 Btu per hour
- 1000 Btu per hour
Question 8: In order to meet minimal standards of comfort ………………… must be reduced to an acceptable level
- Latent heat of the air
- Sensible heat of the air
- Both latent and sensible heat of the air
Question 9: The heat which changes the temperature of substance is …………………..
- Latent heat
- Sensible heat
- Super heat
- Dew heat
Question 10: Under constant temperature the absolute pressure of a gas varies …………….. as its volume
- Inversely
- Proportionally
- Double
- Same
Student Reviews
No reviews yet — be the first to share your experience!
Leave a Review