Question 1: Heat always flows
- Upward
- Horizontally
- Hot to cold
- Cold to hot
HVAC
NEC 2023
HVAC Air Conditioning Practice Test 4
Take a Free Practice Test on HVAC Air Conditioning - 4
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HVAC electrical exams cover electrical theory (Ohm's Law, circuits), transformers, single-phase and three-phase motors, control wiring, safety, and troubleshooting.
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TimeHVAC Air Conditioning Practice Test 4 — Question List
Question 2: The amount of heat in the air that can be measured by thermometer is called as ……..
- Latent heat
- Sensible heat
- Dew heat
- Heat capacity
Question 3: The saturation temperature of any given quantity of water vapor at atmospheric pressure is called as ………..
- Dew point
- Boiling point
- Freezing point
- Melting point
Question 4: What is the general cooling estimation usually given for a person?
- 200 Btu
- 150 Btu
- 250 Btu
- 100 Btu
Question 5: Most air conditioning equipment uses ……………… type of cooling methods in houses and small scale commercial buildings.
- Evaporative cooling
- Gas compression refrigeration
- Cooling with steam
- Cold water coil cooling
Question 6: The discharge water is approximately ………………. warmer than supply water in cold-water cooling method.
- 10<sup>0</sup> F to 15<sup>0</sup>F
- 35<sup>0</sup> F to 55<sup>0</sup>F
- 5<sup>0</sup> F to 10<sup>0</sup>F
- 2<sup>0</sup> F to 15<sup>0</sup>F
Question 7: The brake horse power of an electric motor always higher number than air horsepower
- True
- False
Question 8: What should be air velocity in the air ducts to minimize the effect of frictional losses?
- High
- Low
- Moderate
Question 9: When two fans are operating in series the CFM of the system is …………..
- Same
- Doubled
- Triple
- Quadruple
Question 10: Which of the following can be removed to lower the air temperature?
- Latent heat
- Sensible heat
- Super heat
- Dew heat
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