NATE Gas & Heat Exam
NATE Gas & Heat Exam / NATE Gas & Heat
Preparation/NATE Gas & Heat Exam Practice
Exam With 500 Questions And Correct
Answers| Brand New
The chemical symbol for carbon monoxide is:
A: CO2
B: CO
C: H2O
D: NH3 - Correct Answer :B: CO
Selecting a lower speed tap setting on a furnace indoor blower motor will cause:
A: The temperature rise through the furnace to increase
B: The temperature rise through the furnace to decrease
C: The temperature rise through the furnace will not be affected
D: The furnace to act as a humidifier - Correct Answer :A: The temperature rise through the furnace
to increase
"Carry over" channels or "cross overs" are used to:
A+ TEST BANK 1
, NATE Gas & Heat Exam
A: Carry unused excess fuel back to the flue where it is sent up the stack
B: Carry primary air to the heat exchanger
C: Carry secondary air to the heat exchanger
D: Carry the flame from the first burner that lights to the remaining burners - Correct Answer :D:
Carry the flame from the first burner that lights to the remaining burners
Modern high-efficiency burners use combustion blowers. What are the two major types of
combustion blowers?
A: Induced draft and forced draft
B: High pressure and low pressure
C: Impeller type and centrifugal type
D: Liquid and vapor types - Correct Answer :A: Induced draft and forced draft
The purpose of the combustion blower is to:
A: Cause an adequate amount of oxygen-rich air to mix with the fuel for better combustion
B: Push the products of combustion out of the building
C: Prevent carbon monoxide from entering the heat exchanger
A+ TEST BANK 2
, NATE Gas & Heat Exam
D: Give the larger blower motor a rest - Correct Answer :A: Cause an adequate amount of oxygen-
rich air to mix with the fuel for better combustion
Heat transfers from an object or area at a higher temperature to an object or area at a lower
temperature. A heated heat exchanger transfers heat to the air by:
A: Conduction
B: Natural convection
C: Radiation
D: Forced convection - Correct Answer :D: Forced convection
The voltage that creates a spark on a spark ignition system is approximately:
A: 240 volts
B: 5,000 volts
C: 15,000 volts
D: 25,000 volts - Correct Answer :C: 15,000 volts
The capacity of a natural gas furnace is de-rated by _______ for every 1000 feet above sea level:
A: 1%
B: 2%
A+ TEST BANK 3
, NATE Gas & Heat Exam
C: 3%
D: 4% - Correct Answer :D: 4%
A crack in a heat exchanger can:
A: Allow combustion gases to mix with the space air
B: Prevent the heat from effectively transferring to the air
C: Cause the high-limit control to shut the furnace down
D: Cause the furnace to catch on fire - Correct Answer :A: Allow combustion gases to mix with the
space air
Gas valves operate on what voltage?
A: 12 volts
B: 24 volts
C: 120 volts
D: 230 volts - Correct Answer :B: 24 volts
Mid-efficiency furnaces operate with flue gas temperatures between:
A+ TEST BANK 4
NATE Gas & Heat Exam / NATE Gas & Heat
Preparation/NATE Gas & Heat Exam Practice
Exam With 500 Questions And Correct
Answers| Brand New
The chemical symbol for carbon monoxide is:
A: CO2
B: CO
C: H2O
D: NH3 - Correct Answer :B: CO
Selecting a lower speed tap setting on a furnace indoor blower motor will cause:
A: The temperature rise through the furnace to increase
B: The temperature rise through the furnace to decrease
C: The temperature rise through the furnace will not be affected
D: The furnace to act as a humidifier - Correct Answer :A: The temperature rise through the furnace
to increase
"Carry over" channels or "cross overs" are used to:
A+ TEST BANK 1
, NATE Gas & Heat Exam
A: Carry unused excess fuel back to the flue where it is sent up the stack
B: Carry primary air to the heat exchanger
C: Carry secondary air to the heat exchanger
D: Carry the flame from the first burner that lights to the remaining burners - Correct Answer :D:
Carry the flame from the first burner that lights to the remaining burners
Modern high-efficiency burners use combustion blowers. What are the two major types of
combustion blowers?
A: Induced draft and forced draft
B: High pressure and low pressure
C: Impeller type and centrifugal type
D: Liquid and vapor types - Correct Answer :A: Induced draft and forced draft
The purpose of the combustion blower is to:
A: Cause an adequate amount of oxygen-rich air to mix with the fuel for better combustion
B: Push the products of combustion out of the building
C: Prevent carbon monoxide from entering the heat exchanger
A+ TEST BANK 2
, NATE Gas & Heat Exam
D: Give the larger blower motor a rest - Correct Answer :A: Cause an adequate amount of oxygen-
rich air to mix with the fuel for better combustion
Heat transfers from an object or area at a higher temperature to an object or area at a lower
temperature. A heated heat exchanger transfers heat to the air by:
A: Conduction
B: Natural convection
C: Radiation
D: Forced convection - Correct Answer :D: Forced convection
The voltage that creates a spark on a spark ignition system is approximately:
A: 240 volts
B: 5,000 volts
C: 15,000 volts
D: 25,000 volts - Correct Answer :C: 15,000 volts
The capacity of a natural gas furnace is de-rated by _______ for every 1000 feet above sea level:
A: 1%
B: 2%
A+ TEST BANK 3
, NATE Gas & Heat Exam
C: 3%
D: 4% - Correct Answer :D: 4%
A crack in a heat exchanger can:
A: Allow combustion gases to mix with the space air
B: Prevent the heat from effectively transferring to the air
C: Cause the high-limit control to shut the furnace down
D: Cause the furnace to catch on fire - Correct Answer :A: Allow combustion gases to mix with the
space air
Gas valves operate on what voltage?
A: 12 volts
B: 24 volts
C: 120 volts
D: 230 volts - Correct Answer :B: 24 volts
Mid-efficiency furnaces operate with flue gas temperatures between:
A+ TEST BANK 4
