Oil Heat Exam Questions And Complete
Solutions 2025/2026
What is the largest exposed tank allowed in a building without a permit - answers 660 g
What is tank approval - answers UL 80 UL 142
A supply tank shall be securely supported by ridged, non-combustible supports to
prevent settling, sliding or lifting. true or false - answers True
What is the largest amount of oil that can be stored with exposed tanks? - answers
1320 g
What is the closest distance a supply tank can be to the burner - answers 5 ft
What is the gauge of a 275 g above ground tank - answers 12 gauge
The maximum amount of fuel may be delivered without a permit to store in effect
provided that application has been made in accordance with code. true or false -
answers True
Vent pipe for a 500 g tank should be - answers 1 1/4"
A supply tank may be supported by any ridge support. true or false - answers False
Stack switch relays can no longer be used in installations or replacement because -
answers Their lock-out time is no longer the code requirement
An oil safety valve should be used when burner pump is lifting oil. True or false -
answers False
On a warm air furnace, the blower comes off and on in short cycles because - answers
The fan on/off differential is less than 40°F
What could cause a steam boiler to flood - answers Leaky tank less coil
Having to put water in a steam boiler once or twice a week is caused by - answers
Weak return line, radiator vents leaking, boiler sprung a leak
Some radiators on a steam system do not heat up because - answers The radiator
vents are clogged
On a hot water boiler the pressure is 30psi and the relief valve is open because -
answers Leaky tankless coil, bad pressure reducing valve, perforated tankless bladder
,Some forced hot-water radiators are not heating because - answers Vent is clogged,
radiators are air bound, radiator valves clogged shut
A cad-cell primary control can lock-out safety because - answers Cad-cell is dirty, Cad-
cell is faulty, The cad-cell is not sensing flame
On a no heat call, a cad-cell primary control fired when TT is jumped out because -
answers The thermostat or thermostat wired are no good
In-step means - answers The primary control start circuit is closed
On a no heat call on a hot water system, the oil burner is off on high-limit, but the
circulator is not running because - answers The reverse is open, circulator motor burnt
out, switching relay is faulty
The burner operates but there is no combustion because - answers There is too much
air
On a replacement steam boiler installation, you should pipe full-size risers to the
header. True or false - answers False
What is the best way to remove surface oil? - answers Skimming
Where should the water like normally be in the sight glass when the boiler is off -
answers Center of the sight glass
What is the purpose of the automatic water feed on a steam boiler - answers To
maintain a safe minimum water line
What is the purpose of the hartford loop - answers To prevent siphoning of the boiler
What is the normal cut in pressure of a residential steam boiler - answers 1/2 psi
What is the purpose of an oil safety valve - answers Prevents oil flow in the event of a
line rupture or excessive line inlet pressure
What does the term "approved" mean - answers Recognized by a nationally recognized
texting lab
What is a safety control - answers Any control used to prevent unsafe operation of the
uncontrolled equipment
What is a draft booster - answers Power operated fan installed in the chimney
connector to increase natural draft
, What is a "confined space?" - answers Any space who's volume is less than 50 cubic
feet per 1000 BTU's of all fuel burning equipment
What is "installation"? - answers Complete and ready for operation of any oil-burning
appliance
I hat is post purge control - answers A control that is designed to allow the power vent
or oil burner to operate after flame has been shut off
What is the "power venter" - answers An electrical device used to produce a negative
draft at the heating appliance
What is "easily accessible" - answers Capable of being reached easily and quickly for
maintenance and inspection
Oil tanks less than 660 gallons shall be constructed under provisions of - answers UL
80
Full and vent pipes may be of materials other than steel or brass. True or false -
answers True
An undisclosed oil tank not larger than ten gallons shall not be placed any closer than 5
feet from any combustible equipment. True or false - answers True
What is the exception to the restriction on compression fittings used on oil lines -
answers Flair type and gauge able two feral swage type fittings are allowed
Underground tank test wells can be installed in basements. True or false - answers
False
A controller acting as a safety limit shall be installed in the - answers Burner supply
circuit in addition to the regular operating control
If a gas pilot is used for ignition, the flame must be proven in - answers 15 seconds
What is the "interrupted ignition" - answers Ignition is present at the electrodes for a
period
What is the maximum allowable flame reaction time - answers 3 seconds
Under 3 gallons per hour, what is the maximum allowable time for ignition trials? -
answers 45 seconds
An approved combustion air supervisory switch is required when - answers When a
separately powered louvers fan or blower is used to supply combustion air for the oil
burner
Solutions 2025/2026
What is the largest exposed tank allowed in a building without a permit - answers 660 g
What is tank approval - answers UL 80 UL 142
A supply tank shall be securely supported by ridged, non-combustible supports to
prevent settling, sliding or lifting. true or false - answers True
What is the largest amount of oil that can be stored with exposed tanks? - answers
1320 g
What is the closest distance a supply tank can be to the burner - answers 5 ft
What is the gauge of a 275 g above ground tank - answers 12 gauge
The maximum amount of fuel may be delivered without a permit to store in effect
provided that application has been made in accordance with code. true or false -
answers True
Vent pipe for a 500 g tank should be - answers 1 1/4"
A supply tank may be supported by any ridge support. true or false - answers False
Stack switch relays can no longer be used in installations or replacement because -
answers Their lock-out time is no longer the code requirement
An oil safety valve should be used when burner pump is lifting oil. True or false -
answers False
On a warm air furnace, the blower comes off and on in short cycles because - answers
The fan on/off differential is less than 40°F
What could cause a steam boiler to flood - answers Leaky tank less coil
Having to put water in a steam boiler once or twice a week is caused by - answers
Weak return line, radiator vents leaking, boiler sprung a leak
Some radiators on a steam system do not heat up because - answers The radiator
vents are clogged
On a hot water boiler the pressure is 30psi and the relief valve is open because -
answers Leaky tankless coil, bad pressure reducing valve, perforated tankless bladder
,Some forced hot-water radiators are not heating because - answers Vent is clogged,
radiators are air bound, radiator valves clogged shut
A cad-cell primary control can lock-out safety because - answers Cad-cell is dirty, Cad-
cell is faulty, The cad-cell is not sensing flame
On a no heat call, a cad-cell primary control fired when TT is jumped out because -
answers The thermostat or thermostat wired are no good
In-step means - answers The primary control start circuit is closed
On a no heat call on a hot water system, the oil burner is off on high-limit, but the
circulator is not running because - answers The reverse is open, circulator motor burnt
out, switching relay is faulty
The burner operates but there is no combustion because - answers There is too much
air
On a replacement steam boiler installation, you should pipe full-size risers to the
header. True or false - answers False
What is the best way to remove surface oil? - answers Skimming
Where should the water like normally be in the sight glass when the boiler is off -
answers Center of the sight glass
What is the purpose of the automatic water feed on a steam boiler - answers To
maintain a safe minimum water line
What is the purpose of the hartford loop - answers To prevent siphoning of the boiler
What is the normal cut in pressure of a residential steam boiler - answers 1/2 psi
What is the purpose of an oil safety valve - answers Prevents oil flow in the event of a
line rupture or excessive line inlet pressure
What does the term "approved" mean - answers Recognized by a nationally recognized
texting lab
What is a safety control - answers Any control used to prevent unsafe operation of the
uncontrolled equipment
What is a draft booster - answers Power operated fan installed in the chimney
connector to increase natural draft
, What is a "confined space?" - answers Any space who's volume is less than 50 cubic
feet per 1000 BTU's of all fuel burning equipment
What is "installation"? - answers Complete and ready for operation of any oil-burning
appliance
I hat is post purge control - answers A control that is designed to allow the power vent
or oil burner to operate after flame has been shut off
What is the "power venter" - answers An electrical device used to produce a negative
draft at the heating appliance
What is "easily accessible" - answers Capable of being reached easily and quickly for
maintenance and inspection
Oil tanks less than 660 gallons shall be constructed under provisions of - answers UL
80
Full and vent pipes may be of materials other than steel or brass. True or false -
answers True
An undisclosed oil tank not larger than ten gallons shall not be placed any closer than 5
feet from any combustible equipment. True or false - answers True
What is the exception to the restriction on compression fittings used on oil lines -
answers Flair type and gauge able two feral swage type fittings are allowed
Underground tank test wells can be installed in basements. True or false - answers
False
A controller acting as a safety limit shall be installed in the - answers Burner supply
circuit in addition to the regular operating control
If a gas pilot is used for ignition, the flame must be proven in - answers 15 seconds
What is the "interrupted ignition" - answers Ignition is present at the electrodes for a
period
What is the maximum allowable flame reaction time - answers 3 seconds
Under 3 gallons per hour, what is the maximum allowable time for ignition trials? -
answers 45 seconds
An approved combustion air supervisory switch is required when - answers When a
separately powered louvers fan or blower is used to supply combustion air for the oil
burner
