NATE Gas & Heat Newest Exam / NATE Gas & Heat Preparation
NATE GAS & HEAT NEWEST EXAM / NATE GAS & HEAT
PREPARATION/NATE GAS & HEAT EXAM PRACTICE EXAM WITH
100 QUESTIONS AND CORRECT ANSWERS| BRAND NEW
VERSION!
An unconfined space (in terms of furnace installation) is defined as a space with a
volume equal to or greater than ______ per 1,000 Btu of input rating.
a. 25 ft.3
b. 50 ft.3
c. 75 ft.3
d. 100 ft.3 - Correct Answer-b
Combustion air may be added to a confined space by a duct to the outside, sized
on an input of 1 in.2 per _____.
a. 1,000 Btu
b. 2,000 Btu
c. 4,000 Btu
d. 5,000 Btu - Correct Answer-d
What type of burners are commonly used with induced-draft gas furnaces?
a. Gun style
b. Pot style
c. Ribbon
d. Inshot - Correct Answer-d
1|Page
, NATE Gas & Heat Newest Exam / NATE Gas & Heat Preparation
What is the typical color of a properly burning gas flame?
a. Blue
b. Orange
c. Red
d. Yellow - Correct Answer-a
In a gas furnace, primary combustion air is introduced in the _______.
a. burner prior to ignition
b. burner after ignition
c. gas line
d. heat exchanger - Correct Answer-a
A "dumbbell" style CO2 tester ________.
a. contains a test fluid that absorbs CO2
b. measures CO2 in parts per million
c. provides a digital readout
d. requires a power supply - Correct Answer-a
Useful heat output, expressed as a percentage of the total burner input, is known
as the ______ of a gas furnace.
a. combustion efficiency
b. fuel efficiency
2|Page
, NATE Gas & Heat Newest Exam / NATE Gas & Heat Preparation
c. heat exchanger performance factor
d. heating coefficient - Correct Answer-a
Which type of ignition system uses a thermocouple?
a. Direct ignition
b. Hot-surface
c. Intermittent ignition
d. Standing pilot - Correct Answer-d
The blower in a standing pilot furnace is generally started by a(n) ______.
a. differential pressure switch
b. ignition module
c. temperature switch
d. time-delay relay - Correct Answer-c
A furnace with an induced-draft fan uses a _______ to prove air flow.
a. high-pressure switch
b. low-pressure switch
c. pressure differential switch
d. sail switch - Correct Answer-c
Flame rectification proves flame by creating a signal in response to a ______.
a. change in resistance
3|Page
NATE GAS & HEAT NEWEST EXAM / NATE GAS & HEAT
PREPARATION/NATE GAS & HEAT EXAM PRACTICE EXAM WITH
100 QUESTIONS AND CORRECT ANSWERS| BRAND NEW
VERSION!
An unconfined space (in terms of furnace installation) is defined as a space with a
volume equal to or greater than ______ per 1,000 Btu of input rating.
a. 25 ft.3
b. 50 ft.3
c. 75 ft.3
d. 100 ft.3 - Correct Answer-b
Combustion air may be added to a confined space by a duct to the outside, sized
on an input of 1 in.2 per _____.
a. 1,000 Btu
b. 2,000 Btu
c. 4,000 Btu
d. 5,000 Btu - Correct Answer-d
What type of burners are commonly used with induced-draft gas furnaces?
a. Gun style
b. Pot style
c. Ribbon
d. Inshot - Correct Answer-d
1|Page
, NATE Gas & Heat Newest Exam / NATE Gas & Heat Preparation
What is the typical color of a properly burning gas flame?
a. Blue
b. Orange
c. Red
d. Yellow - Correct Answer-a
In a gas furnace, primary combustion air is introduced in the _______.
a. burner prior to ignition
b. burner after ignition
c. gas line
d. heat exchanger - Correct Answer-a
A "dumbbell" style CO2 tester ________.
a. contains a test fluid that absorbs CO2
b. measures CO2 in parts per million
c. provides a digital readout
d. requires a power supply - Correct Answer-a
Useful heat output, expressed as a percentage of the total burner input, is known
as the ______ of a gas furnace.
a. combustion efficiency
b. fuel efficiency
2|Page
, NATE Gas & Heat Newest Exam / NATE Gas & Heat Preparation
c. heat exchanger performance factor
d. heating coefficient - Correct Answer-a
Which type of ignition system uses a thermocouple?
a. Direct ignition
b. Hot-surface
c. Intermittent ignition
d. Standing pilot - Correct Answer-d
The blower in a standing pilot furnace is generally started by a(n) ______.
a. differential pressure switch
b. ignition module
c. temperature switch
d. time-delay relay - Correct Answer-c
A furnace with an induced-draft fan uses a _______ to prove air flow.
a. high-pressure switch
b. low-pressure switch
c. pressure differential switch
d. sail switch - Correct Answer-c
Flame rectification proves flame by creating a signal in response to a ______.
a. change in resistance
3|Page
