HVAC GAS HEAT CERTIFICATION EXAM QUESTIONS AND ANSWERS
LATEST UPDATED 2025/2026 A COMPLETE SOLUTION ALL ANSWERS
100% CORRECT DETAILED BEST RATED A+ FOR SUCCESS
A "spud" or burner orifice - CORRECT ANSWERS Meters gas to the burner
A good thermocouple should read approximately ____ on a D.C. meter - CORRECT
ANSWERS 30 millivolta
Liquefied petroleum, (LP) gases are - CORRECT ANSWERS Propane and butane
Fan time/temperature delay switches are used on gas furnaces to - CORRECT ANSWERS
Allow the heat exchanger to warm up
What instrument would a technician use to measure return airflow to a furnace - CORRECT
ANSWERS Anemometer
A furnace with a hot surface igniter will not light. Before changing the igniter the technician
should - CORRECT ANSWERS Check voltage to igniter
A technician starts a standing pilot furnace and notices on main ignition the flames "roll out".
The technician suspects - CORRECT ANSWERS Low gas pressure
A technician servicing an LP gas furnace notices a tag stating it was converted from natural gas.
He finds large amount of soot I'm the heat exchanger. What could be the cause of this soot -
CORRECT ANSWERS Orifice, (spud) too large
A customer tells a technician that his six month old furnace stops heating before the residence
is warm. This happens only on very cold nights. The technician suspects - CORRECT
ANSWERS Incorrect heat anticipatory setting
, HVAC GAS HEAT CERTIFICATION EXAM QUESTIONS AND ANSWERS
LATEST UPDATED 2025/2026 A COMPLETE SOLUTION ALL ANSWERS
100% CORRECT DETAILED BEST RATED A+ FOR SUCCESS
A standing pilot furnace has a bi-metal fan/ limit control. What are the factory settings -
CORRECT ANSWERS Fan on 125°F/Fan off 80°F/Limit cut out 200°F
Type B vent pipe is constructed with an inner pipe and outer pipe. The inner pipe is made of -
CORRECT ANSWERS Aluminum
On a dedicated vent system, a fire stop support plate is located - CORRECT ANSWERS
Where it passes through a ceiling
When venting Category I furnaces, it is sometimes necessary to increase the vent pipe size. The
proper location to adapt to the larger vent is - CORRECT ANSWERS Two feet above the
furnace connection
You are installing 1/2" and 3/4" black iron pipe to a natural gas furnace. What is the
approximate number of thread - CORRECT ANSWERS 8-10
The proper name of the tool used to cut the threads of a steel pipe is a - CORRECT
ANSWERS Die
What would likely be the result of an oversized mid efficiency furnace - CORRECT
ANSWERS The heat exchanger would corrode
The normal voltage for a hot surface or glow coil igniter is - CORRECT ANSWERS 120
volts
You are installing two sections of a rectangular sheet metal duct to the main supply line. What
connectors are used to secure sections of the trunk line - CORRECT ANSWERS S
connectors and drive clips
LATEST UPDATED 2025/2026 A COMPLETE SOLUTION ALL ANSWERS
100% CORRECT DETAILED BEST RATED A+ FOR SUCCESS
A "spud" or burner orifice - CORRECT ANSWERS Meters gas to the burner
A good thermocouple should read approximately ____ on a D.C. meter - CORRECT
ANSWERS 30 millivolta
Liquefied petroleum, (LP) gases are - CORRECT ANSWERS Propane and butane
Fan time/temperature delay switches are used on gas furnaces to - CORRECT ANSWERS
Allow the heat exchanger to warm up
What instrument would a technician use to measure return airflow to a furnace - CORRECT
ANSWERS Anemometer
A furnace with a hot surface igniter will not light. Before changing the igniter the technician
should - CORRECT ANSWERS Check voltage to igniter
A technician starts a standing pilot furnace and notices on main ignition the flames "roll out".
The technician suspects - CORRECT ANSWERS Low gas pressure
A technician servicing an LP gas furnace notices a tag stating it was converted from natural gas.
He finds large amount of soot I'm the heat exchanger. What could be the cause of this soot -
CORRECT ANSWERS Orifice, (spud) too large
A customer tells a technician that his six month old furnace stops heating before the residence
is warm. This happens only on very cold nights. The technician suspects - CORRECT
ANSWERS Incorrect heat anticipatory setting
, HVAC GAS HEAT CERTIFICATION EXAM QUESTIONS AND ANSWERS
LATEST UPDATED 2025/2026 A COMPLETE SOLUTION ALL ANSWERS
100% CORRECT DETAILED BEST RATED A+ FOR SUCCESS
A standing pilot furnace has a bi-metal fan/ limit control. What are the factory settings -
CORRECT ANSWERS Fan on 125°F/Fan off 80°F/Limit cut out 200°F
Type B vent pipe is constructed with an inner pipe and outer pipe. The inner pipe is made of -
CORRECT ANSWERS Aluminum
On a dedicated vent system, a fire stop support plate is located - CORRECT ANSWERS
Where it passes through a ceiling
When venting Category I furnaces, it is sometimes necessary to increase the vent pipe size. The
proper location to adapt to the larger vent is - CORRECT ANSWERS Two feet above the
furnace connection
You are installing 1/2" and 3/4" black iron pipe to a natural gas furnace. What is the
approximate number of thread - CORRECT ANSWERS 8-10
The proper name of the tool used to cut the threads of a steel pipe is a - CORRECT
ANSWERS Die
What would likely be the result of an oversized mid efficiency furnace - CORRECT
ANSWERS The heat exchanger would corrode
The normal voltage for a hot surface or glow coil igniter is - CORRECT ANSWERS 120
volts
You are installing two sections of a rectangular sheet metal duct to the main supply line. What
connectors are used to secure sections of the trunk line - CORRECT ANSWERS S
connectors and drive clips
