Oil Burner License Exam 2025
Questions and Answers
What is the first thing a tech should do when arriving at a no combustion call? - --
CORRECT ANSWER--Ask how many times the customer reset the unit.
What is the best long term solution for preventing a clogged nozzle? - --
CORRECT ANSWER---Remove any underground storage tanks.
-Install a quality oil filter.
-Cut the suction line 10" above the tank outlet to prevent sludge.
Hot water and steam valves are interchangeable. - --CORRECT ANSWER--False
When in the presence of a flame, a cad cell normally reads.. - --CORRECT
ANSWER--300-1000 ohms
If a pump is used to bring oil to a level higher than the tank, an oil safety valve is
required. - --CORRECT ANSWER--True
On a call where a hydronic heat system is putting out too much heat on the stack,
the issue may be.. - --CORRECT ANSWER---Too much draft.
-Not enough combustion air in the equipment room.
....COPYRIGHT ©️ 2025 ALL RIGHTS RESERVED...TRUSTED & VERIFIED 1
,-Air leakage into chamber.
A high CO2 reading is caused by.. - --CORRECT ANSWER--Incomplete
combustion
An often overlooked cause of a high CO2 reading is.. - --CORRECT ANSWER--
Not enough combustion air in the equipment room.
When multiple pumps are wired together in a heating system, they should be wired
in.. - --CORRECT ANSWER--parallel
In a series circuit.. - --CORRECT ANSWER--Current has one path.
When 2 burners are connected to the same chimney.. - --CORRECT ANSWER--
Sufficient draft must be obtained to operate both units.
The ignition transformer is located.. - --CORRECT ANSWER--In the primary
control.
When safeties are wired in series one safety will affect the operation of the others. -
--CORRECT ANSWER--True
A stack switch is no longer allowed to be installed or replaced because.. - --
CORRECT ANSWER--It's safety cutout time is higher than what is now required.
What is a power venter and what does it do? - --CORRECT ANSWER--An
electrical device that sends fluid gases into the chimney connector.
....COPYRIGHT ©️ 2025 ALL RIGHTS RESERVED...TRUSTED & VERIFIED 2
,A burner in a confined space using 1 GPH of #2 fuel oil requires what size
permanent opening for combustion air? - --CORRECT ANSWER--140"
The difference between an adjustable flame retention burner and a fixed flame
retention burner is? - --CORRECT ANSWER--Air inlets can be adjusted
Ignitor position can be adjusted
Fuel can be adjusted
Oil tank design, construction, installation and testing shall be in accordance with.. -
--CORRECT ANSWER--527 CMR 9.0
Heat is a form of.. - --CORRECT ANSWER--Energy
If a burner is operational but the circulator pump isn't running.. - --CORRECT
ANSWER--The pump relay is not working correctly
A method of dealing with low viscosity/cold temps with #2 oil? - --CORRECT
ANSWER--Increase pump pressure/ decrease nozzle size
What is needed at the outlet of an oil tank? - --CORRECT ANSWER--Thermal
safety valve
Where do you obtain an installation permit for oil burners? - --CORRECT
ANSWER--Fire Dept
....COPYRIGHT ©️ 2025 ALL RIGHTS RESERVED...TRUSTED & VERIFIED 3
, How many Btu's approximately in 1 gal of #2 fuel oil? - --CORRECT ANSWER--
140,000 btu's
Solid state ignition is superior to spark because - --CORRECT ANSWER--It is not
affected by reduced voltage
What is an installation? - --CORRECT ANSWER--The complete setting in place,
ready for operation, of an oil burner appliance together with its accessories and
equipment.
How far must a power vent terminate from an opening or window? - --CORRECT
ANSWER--4'
A pump in a one pipe system that is full of air can be self purged. - --CORRECT
ANSWER--False
List the minimum size of an oil supply line. - --CORRECT ANSWER--3/8"
A material with electrons so loose it allows voltage to pass with little or no
resistance.. - --CORRECT ANSWER--Is a conductor
If a high limit goes off, what does a low water switch do? - --CORRECT
ANSWER--Maintains water temperature
What is flashpoint an indicator of? - --CORRECT ANSWER--Minimum
temperature oil will ignite but not continue to burn.
What travels on the inside of the wire? - --CORRECT ANSWER--Volts
....COPYRIGHT ©️ 2025 ALL RIGHTS RESERVED...TRUSTED & VERIFIED 4
Questions and Answers
What is the first thing a tech should do when arriving at a no combustion call? - --
CORRECT ANSWER--Ask how many times the customer reset the unit.
What is the best long term solution for preventing a clogged nozzle? - --
CORRECT ANSWER---Remove any underground storage tanks.
-Install a quality oil filter.
-Cut the suction line 10" above the tank outlet to prevent sludge.
Hot water and steam valves are interchangeable. - --CORRECT ANSWER--False
When in the presence of a flame, a cad cell normally reads.. - --CORRECT
ANSWER--300-1000 ohms
If a pump is used to bring oil to a level higher than the tank, an oil safety valve is
required. - --CORRECT ANSWER--True
On a call where a hydronic heat system is putting out too much heat on the stack,
the issue may be.. - --CORRECT ANSWER---Too much draft.
-Not enough combustion air in the equipment room.
....COPYRIGHT ©️ 2025 ALL RIGHTS RESERVED...TRUSTED & VERIFIED 1
,-Air leakage into chamber.
A high CO2 reading is caused by.. - --CORRECT ANSWER--Incomplete
combustion
An often overlooked cause of a high CO2 reading is.. - --CORRECT ANSWER--
Not enough combustion air in the equipment room.
When multiple pumps are wired together in a heating system, they should be wired
in.. - --CORRECT ANSWER--parallel
In a series circuit.. - --CORRECT ANSWER--Current has one path.
When 2 burners are connected to the same chimney.. - --CORRECT ANSWER--
Sufficient draft must be obtained to operate both units.
The ignition transformer is located.. - --CORRECT ANSWER--In the primary
control.
When safeties are wired in series one safety will affect the operation of the others. -
--CORRECT ANSWER--True
A stack switch is no longer allowed to be installed or replaced because.. - --
CORRECT ANSWER--It's safety cutout time is higher than what is now required.
What is a power venter and what does it do? - --CORRECT ANSWER--An
electrical device that sends fluid gases into the chimney connector.
....COPYRIGHT ©️ 2025 ALL RIGHTS RESERVED...TRUSTED & VERIFIED 2
,A burner in a confined space using 1 GPH of #2 fuel oil requires what size
permanent opening for combustion air? - --CORRECT ANSWER--140"
The difference between an adjustable flame retention burner and a fixed flame
retention burner is? - --CORRECT ANSWER--Air inlets can be adjusted
Ignitor position can be adjusted
Fuel can be adjusted
Oil tank design, construction, installation and testing shall be in accordance with.. -
--CORRECT ANSWER--527 CMR 9.0
Heat is a form of.. - --CORRECT ANSWER--Energy
If a burner is operational but the circulator pump isn't running.. - --CORRECT
ANSWER--The pump relay is not working correctly
A method of dealing with low viscosity/cold temps with #2 oil? - --CORRECT
ANSWER--Increase pump pressure/ decrease nozzle size
What is needed at the outlet of an oil tank? - --CORRECT ANSWER--Thermal
safety valve
Where do you obtain an installation permit for oil burners? - --CORRECT
ANSWER--Fire Dept
....COPYRIGHT ©️ 2025 ALL RIGHTS RESERVED...TRUSTED & VERIFIED 3
, How many Btu's approximately in 1 gal of #2 fuel oil? - --CORRECT ANSWER--
140,000 btu's
Solid state ignition is superior to spark because - --CORRECT ANSWER--It is not
affected by reduced voltage
What is an installation? - --CORRECT ANSWER--The complete setting in place,
ready for operation, of an oil burner appliance together with its accessories and
equipment.
How far must a power vent terminate from an opening or window? - --CORRECT
ANSWER--4'
A pump in a one pipe system that is full of air can be self purged. - --CORRECT
ANSWER--False
List the minimum size of an oil supply line. - --CORRECT ANSWER--3/8"
A material with electrons so loose it allows voltage to pass with little or no
resistance.. - --CORRECT ANSWER--Is a conductor
If a high limit goes off, what does a low water switch do? - --CORRECT
ANSWER--Maintains water temperature
What is flashpoint an indicator of? - --CORRECT ANSWER--Minimum
temperature oil will ignite but not continue to burn.
What travels on the inside of the wire? - --CORRECT ANSWER--Volts
....COPYRIGHT ©️ 2025 ALL RIGHTS RESERVED...TRUSTED & VERIFIED 4
