G2 Gas Technician Module 23 Revised
Questions with 100% Correct Answers |
Verified | Latest Update 2026
Why are air cleaners installed ahead of heating or cooling coils and air conditioners? - CORRECT
ANSWERS To protect the equipment from dust and increase efficiency
What are two ways in which a mechanical filter could restrict air flow? - CORRECT ANSWERS
Dirty Air Filter and Incorrect Air Filter
Name three types of air cleaners that can be used with a forced-air furnace? - CORRECT ANSWERS
Media, electrostatic, and electronic
Which type of air cleaner is usually the least expensive? - CORRECT ANSWERS
Media/Mechanical
Which type of air cleaner is usually the most expensive? - CORRECT ANSWERS Electronic
(EAC)
Name two advantages of an electronic air cleaner? - CORRECT ANSWERS Highly Efficiency
and Collects Particles
Do electronic air cleaners remove smoke odours from the conditioned air? - CORRECT ANSWERS
No
How can smoke odours be reduced? - CORRECT ANSWERS Activated Carbon Filter/ Coal
Filter
, What must the gas technician do before installing any air cleaner? - CORRECT ANSWERS
Comply with Manufacturers Instructions
If there are arrows on a filter frame, which way must they face? - CORRECT ANSWERS Same
way as the systems air flow
Why must be done before opening the blower door on a forced-air furnace? - CORRECT ANSWERS
Disconnect Power
How frequently should furnace filter be inspected in the heating season? - CORRECT ANSWERS
Every Month
How frequently should filters be replaced? - CORRECT ANSWERS Whenever they need to be.
Why can disposable filters not be re-used? - CORRECT ANSWERS Removal of mineral oils will
cause the filter to not operate
Name three problems that can result from operating a forced-air furnace without a filter? - CORRECT
ANSWERS Dust and lint buildup, Inefficiency and Fire
What is the most common cause of inadequate heating or cooling performance? - CORRECT ANSWERS
Dirty Air Filter
What damage can a dirty filter do in a system that includes add-on air conditioning? - CORRECT
ANSWERS Inadequate Air Flow and floodback
How can clean filters save the customer money? - CORRECT ANSWERS Preventing
equipment damage
Questions with 100% Correct Answers |
Verified | Latest Update 2026
Why are air cleaners installed ahead of heating or cooling coils and air conditioners? - CORRECT
ANSWERS To protect the equipment from dust and increase efficiency
What are two ways in which a mechanical filter could restrict air flow? - CORRECT ANSWERS
Dirty Air Filter and Incorrect Air Filter
Name three types of air cleaners that can be used with a forced-air furnace? - CORRECT ANSWERS
Media, electrostatic, and electronic
Which type of air cleaner is usually the least expensive? - CORRECT ANSWERS
Media/Mechanical
Which type of air cleaner is usually the most expensive? - CORRECT ANSWERS Electronic
(EAC)
Name two advantages of an electronic air cleaner? - CORRECT ANSWERS Highly Efficiency
and Collects Particles
Do electronic air cleaners remove smoke odours from the conditioned air? - CORRECT ANSWERS
No
How can smoke odours be reduced? - CORRECT ANSWERS Activated Carbon Filter/ Coal
Filter
, What must the gas technician do before installing any air cleaner? - CORRECT ANSWERS
Comply with Manufacturers Instructions
If there are arrows on a filter frame, which way must they face? - CORRECT ANSWERS Same
way as the systems air flow
Why must be done before opening the blower door on a forced-air furnace? - CORRECT ANSWERS
Disconnect Power
How frequently should furnace filter be inspected in the heating season? - CORRECT ANSWERS
Every Month
How frequently should filters be replaced? - CORRECT ANSWERS Whenever they need to be.
Why can disposable filters not be re-used? - CORRECT ANSWERS Removal of mineral oils will
cause the filter to not operate
Name three problems that can result from operating a forced-air furnace without a filter? - CORRECT
ANSWERS Dust and lint buildup, Inefficiency and Fire
What is the most common cause of inadequate heating or cooling performance? - CORRECT ANSWERS
Dirty Air Filter
What damage can a dirty filter do in a system that includes add-on air conditioning? - CORRECT
ANSWERS Inadequate Air Flow and floodback
How can clean filters save the customer money? - CORRECT ANSWERS Preventing
equipment damage
