NATE Gas Exam Questions and Answers Latest Updated| 100%
Correct
Question 1
What is the typical load rating of the branch circuit over-current protection for a residential gas furnace?
Correct Answer
15 Amp
Question 2
When selecting a replacement indoor blower motor, which criteria should be included?
Correct Answer
Motor horsepower
Question 3
What is the primary purpose of an off-delay timer in a gas furnace?
Correct Answer
Remove residual hear and prevent nuisance limit trips
Page 1 of 17
,Question 4
To minimize noise problems in residential duct systems, what is the range (recommended to maximum) of design air
velocity in the rectangular main supply trunk?
Correct Answer
700 to 900 fpm
Question 5
What is recommended for a pressurization leak test of fuel gas pipe?
Correct Answer
Compressed air
Question 6
Induced draft blowers in direct vent condensing furnaces pull combustion air from
Correct Answer
outdoors only
Question 7
Combustion air is often brought into a non-direct vent gas furnace, located in an interior closet (confined space). What
consideration is important to remember?
Correct Answer
Two permanent openings of sufficient size must be used
Page 2 of 17
, Question 8
The height limitation for a vertical combustion air intake on a condensing gas furnace is set by
Correct Answer
the furnace manufacturer
Question 9
When working on burners in a gas function
Correct Answer
the individual burners must be mounted in correct alignment
Question 10
A thermopile system usually generates its own control circuit voltage of
Correct Answer
750 mV
Question 11
There are two generally used methods for controlling temperature and humidity within individual zones of a residence.
One is to use dampers to control supply airflow to each zone. What is the other method?
Correct Answer
Use separate and independent systems to condition the air in each zone
Page 3 of 17
Correct
Question 1
What is the typical load rating of the branch circuit over-current protection for a residential gas furnace?
Correct Answer
15 Amp
Question 2
When selecting a replacement indoor blower motor, which criteria should be included?
Correct Answer
Motor horsepower
Question 3
What is the primary purpose of an off-delay timer in a gas furnace?
Correct Answer
Remove residual hear and prevent nuisance limit trips
Page 1 of 17
,Question 4
To minimize noise problems in residential duct systems, what is the range (recommended to maximum) of design air
velocity in the rectangular main supply trunk?
Correct Answer
700 to 900 fpm
Question 5
What is recommended for a pressurization leak test of fuel gas pipe?
Correct Answer
Compressed air
Question 6
Induced draft blowers in direct vent condensing furnaces pull combustion air from
Correct Answer
outdoors only
Question 7
Combustion air is often brought into a non-direct vent gas furnace, located in an interior closet (confined space). What
consideration is important to remember?
Correct Answer
Two permanent openings of sufficient size must be used
Page 2 of 17
, Question 8
The height limitation for a vertical combustion air intake on a condensing gas furnace is set by
Correct Answer
the furnace manufacturer
Question 9
When working on burners in a gas function
Correct Answer
the individual burners must be mounted in correct alignment
Question 10
A thermopile system usually generates its own control circuit voltage of
Correct Answer
750 mV
Question 11
There are two generally used methods for controlling temperature and humidity within individual zones of a residence.
One is to use dampers to control supply airflow to each zone. What is the other method?
Correct Answer
Use separate and independent systems to condition the air in each zone
Page 3 of 17
