HVAC Gas Heat certification exam
A "spud" or burner orifice - ANS-Meters fuel to the burner
A BTU is the amount of warmth required to raise the temperature of one pound of water -
ANS-One degree Fahrenheit
A category 1 natural gas furnace has a regular air temperature upward thrust of - ANS-60°F - a
hundred and twenty°F
A customer complains that a 2-year vintage gas furnace will no longer mild. The technician
determines that the furnace locks out even as attempting to mild. He reads 19 VAC at the gas
valve and concludes - ANS-The digital board is faulty
A client tells a technician that his six month vintage furnace stops heating before the residence
is heat. This occurs simplest on very cold nights. The technician suspects - ANS-Incorrect
warmth anticipatory putting
A devoted vent device - ANS-Is the most effective vent for an equipment
A furnace nameplate specifies a temperature rise of 40 to 70 stages. Temperature
measurements suggest a rise of eighty stages. The most suitable motion is to - ANS-Increase
fan speed
A furnace nameplate specifies a temperature upward thrust of 40 to 70 ranges. Temperature
measurements suggest a upward thrust of 80 degrees. The maximum suitable action is to -
ANS-Increase fan velocity
A furnace with a hot surface igniter will not light. Before changing the igniter the technician need
to - ANS-Check voltage to igniter
A gas furnace has an digital control board. How is the fan cycled all through heating - ANS-Time
A gas furnace has an precipitated draft fan. Which transfer should operated properly before
ignition sequence begins - ANS-Differential air stress
A gasoline furnace is to be installed in a storage. The country wide requirements require that the
burners and ignition resources should be positioned ______ above the floor - ANS-18 inches
A gasoline valve with one hundred% close-off means - ANS-Gas to a pilot and manifold is
close-off
, A GFCI circuit breaker detects - ANS-Current leaks to floor
A right description of the way a bi-steel fan transfer operates the blower motor on a gasoline
furnace is - ANS-Temperature on- temperature off
A properly thermocouple must study approximately ____ on a D.C. Meter - ANS-30 millivolta
A house owner complained that his furnace makes a loud bang upon ignition. The technician
makes a decision to test the fuel pressure and reveals three.2 in. W.C. On the manifold. The
technician should - ANS-Check deliver gas pressure
A herbal gasoline furnace typically requires _____ fuel strain at the manifold and burners -
ANS-three.5 in. W.C.
A primary motive of burner "flashback" is - ANS-Low manifold strain
A spark ignited operates at _____ VAC - ANS-10,000
A status pilot furnace has a bi-metallic fan/ restriction control. What are the factory settings -
ANS-Fan on a hundred twenty five°F/Fan off eighty°F/Limit cut out two hundred°F
A technician connects the electrical circuit to an 80,000 BTU gas furnace with a 3- ton cooling
gadget. The furnace fan motor is rated 1/3 HP @ 120VAC. What length copper conductor might
usually be used for the furnace - ANS-12 - 14 AWG
A technician determines that a herbal gasoline furnace has a defective heat exchanger. The
technician must - ANS-Inform the house owner and turn the gas off
A technician is installing a copper elbow on LP gasoline line; what ought to be used -
ANS-95/five solder
A technician is the use of an extension ladder to paintings on roof pinnacle unit. The pinnacle of
the ladder should amplify _____ beyond the aid point - ANS-3 feet
A technician desires to run thermostat twine 75 toes. To avoid a voltage drop, the technician
should use - ANS-#16 AWG
A technician reads 0 Ohms between the common and low velocity wires on a one hundred
twenty VAC furnace motor. From this the technician determines that the winding is - ANS-Open
A technician servicing an LP gasoline furnace notices a tag pointing out it turned into converted
from herbal fuel. He reveals large amount of soot I'm the warmth exchanger. What will be the
cause of this soot - ANS-Orifice, (spud) too big
A "spud" or burner orifice - ANS-Meters fuel to the burner
A BTU is the amount of warmth required to raise the temperature of one pound of water -
ANS-One degree Fahrenheit
A category 1 natural gas furnace has a regular air temperature upward thrust of - ANS-60°F - a
hundred and twenty°F
A customer complains that a 2-year vintage gas furnace will no longer mild. The technician
determines that the furnace locks out even as attempting to mild. He reads 19 VAC at the gas
valve and concludes - ANS-The digital board is faulty
A client tells a technician that his six month vintage furnace stops heating before the residence
is heat. This occurs simplest on very cold nights. The technician suspects - ANS-Incorrect
warmth anticipatory putting
A devoted vent device - ANS-Is the most effective vent for an equipment
A furnace nameplate specifies a temperature rise of 40 to 70 stages. Temperature
measurements suggest a rise of eighty stages. The most suitable motion is to - ANS-Increase
fan speed
A furnace nameplate specifies a temperature upward thrust of 40 to 70 ranges. Temperature
measurements suggest a upward thrust of 80 degrees. The maximum suitable action is to -
ANS-Increase fan velocity
A furnace with a hot surface igniter will not light. Before changing the igniter the technician need
to - ANS-Check voltage to igniter
A gas furnace has an digital control board. How is the fan cycled all through heating - ANS-Time
A gas furnace has an precipitated draft fan. Which transfer should operated properly before
ignition sequence begins - ANS-Differential air stress
A gasoline furnace is to be installed in a storage. The country wide requirements require that the
burners and ignition resources should be positioned ______ above the floor - ANS-18 inches
A gasoline valve with one hundred% close-off means - ANS-Gas to a pilot and manifold is
close-off
, A GFCI circuit breaker detects - ANS-Current leaks to floor
A right description of the way a bi-steel fan transfer operates the blower motor on a gasoline
furnace is - ANS-Temperature on- temperature off
A properly thermocouple must study approximately ____ on a D.C. Meter - ANS-30 millivolta
A house owner complained that his furnace makes a loud bang upon ignition. The technician
makes a decision to test the fuel pressure and reveals three.2 in. W.C. On the manifold. The
technician should - ANS-Check deliver gas pressure
A herbal gasoline furnace typically requires _____ fuel strain at the manifold and burners -
ANS-three.5 in. W.C.
A primary motive of burner "flashback" is - ANS-Low manifold strain
A spark ignited operates at _____ VAC - ANS-10,000
A status pilot furnace has a bi-metallic fan/ restriction control. What are the factory settings -
ANS-Fan on a hundred twenty five°F/Fan off eighty°F/Limit cut out two hundred°F
A technician connects the electrical circuit to an 80,000 BTU gas furnace with a 3- ton cooling
gadget. The furnace fan motor is rated 1/3 HP @ 120VAC. What length copper conductor might
usually be used for the furnace - ANS-12 - 14 AWG
A technician determines that a herbal gasoline furnace has a defective heat exchanger. The
technician must - ANS-Inform the house owner and turn the gas off
A technician is installing a copper elbow on LP gasoline line; what ought to be used -
ANS-95/five solder
A technician is the use of an extension ladder to paintings on roof pinnacle unit. The pinnacle of
the ladder should amplify _____ beyond the aid point - ANS-3 feet
A technician desires to run thermostat twine 75 toes. To avoid a voltage drop, the technician
should use - ANS-#16 AWG
A technician reads 0 Ohms between the common and low velocity wires on a one hundred
twenty VAC furnace motor. From this the technician determines that the winding is - ANS-Open
A technician servicing an LP gasoline furnace notices a tag pointing out it turned into converted
from herbal fuel. He reveals large amount of soot I'm the warmth exchanger. What will be the
cause of this soot - ANS-Orifice, (spud) too big
