Intro to Hvac Exam Questions and
Answers (Latest Update 2026)
Which of these heating methods is most commonly used as a heat
source in cold climates? -
correct answer ✅Natural gas furnaces
Which of the following is a device used to maintain indoor air
quality? -
correct answer ✅Ultraviolet light
The purpose of an evaporator in a refrigeration cycle is to -
correct answer ✅transfer heat from the air to the refrigerant
Heat can be transferred from a refrigerant to the outdoors on a hot
day because the -
correct answer ✅refrigerant is warmer than the out door air
The expansion valve in the mechanical refrigeration system -
correct answer ✅provides pressure drop
Oxygen is never used to purge an Hvac system because -
correct answer ✅an explosion could occur under a certain
conditions
Answers (Latest Update 2026)
Which of these heating methods is most commonly used as a heat
source in cold climates? -
correct answer ✅Natural gas furnaces
Which of the following is a device used to maintain indoor air
quality? -
correct answer ✅Ultraviolet light
The purpose of an evaporator in a refrigeration cycle is to -
correct answer ✅transfer heat from the air to the refrigerant
Heat can be transferred from a refrigerant to the outdoors on a hot
day because the -
correct answer ✅refrigerant is warmer than the out door air
The expansion valve in the mechanical refrigeration system -
correct answer ✅provides pressure drop
Oxygen is never used to purge an Hvac system because -
correct answer ✅an explosion could occur under a certain
conditions
