MASSACHUSETTS OIL BURNER LICENSE ACTUAL EXAM |
COMPLETE QUESTIONS WITH EXPERT SOLUTIONS | 2026 LATEST
UPDATED | GET A+
The cross connection between two supply tanks shall not exceed? - (answer)660 gallons
When is an automatic draft control not required? - (answer)When the equipment is designed to
control the draft.
Combustion performance testing can indicate: - (answer)Improper air oil mixture, too much
combustion air, and low pump pressure.
If a second oil-burning appliance is installed in a single chimney, you must insure: -
(answer)Sufficient draft is available for safe operation of all connected equipment.
Delayed ignition can be caused by: - (answer)Weak ignition transformer
You should replace the oil burner nozzle with: - (answer)The manufacturers recommended
nozzle spray pattern and spray angle.
Viscosity problems can be corrected by: - (answer)Decreasing the nozzle size and increasing the
pump pressure accordingly
The minimum operating pressure of an oil pump is: - (answer)100 PSI
If a stack relay fails you, must? - (answer)Replace it with an approved type controller
Aquastats are normally found on what type of heating systems? - (answer)Hydronic
,Airstats are found on what type of heating systems? - (answer)Forced warm air systems
Under sized returns on a warm air system can result in what? - (answer)Short cycling of the oil
burner
Incorrect nozzle selection in regards to gallon per hour, can result in what problems in a steam
system? - (answer)Some radiators not heating quickly enough
Low boiler water temperature in a hydronic hot water system may be caused by? -
(answer)Undersized oil burner nozzles
Delayed opening oil valves are used to? - (answer)Allow oil pump to come up to speed
If a steam boiler is to be installed with an automatic feeder it must also have: - (answer)A
backflow prevention device
How can a damaged heat exchanger be detected on a forced warm air system? - (answer)With a
smoke trace candle
If a high limit is installed to prevent high boiler water temperature, what is the function of the
low limit? - (answer)To maintain temperature for domestic hot water
On a steam system, a plugged siphon loop can have what affect on the heating system? -
(answer)Insufficient heat in the living space
On a triple acting aquastat a minimum of 20 degrees is recommend between the high and low
limit, this will prevent? - (answer)The boiler going off on high limit before reaching the
minimum circulator temperature
An advantage of flame retention burner is - (answer)Their high static pressure enables boilers
and furnaces with tighter more efficient heat exchange passages
,The key final adjustment for most oil burners is - (answer)Combustion air
Dirt or lint buildup in the bevel of the burner fan blades will - (answer)Reduce the amount of
combustion air
To change the air ratio for different firing rates with an adjustable head burner you -
(answer)Adjust the position of the drawer assembly in the Air tube
All petroleum products are chemical compounds of - (answer)Hydrogen and carbon
1 gallon of #2 oil contains approximately how many BTU's? - (answer)140,000 BTU's
Flashpoint of a fuel is an indication of - (answer)The lowest temperature at which the fuel will
flash but not continue to burn
The pour point of #2 oil - (answer)Can be lowered by blending with kerosene, can be lowered
with fuel additives, and is the lowest temperature at which it will flow
Maximum fuel allowed without a license - (answer)10,000 gallons
Is heating oil gets colder its viscosity (thickness): - (answer)Increases
Sulfuric acid in combustion gases can: - (answer)Damon's the flue lines, it holds in the flue pipe,
and create a scale buildup in the heat exchanger
The home for bacterial growth and sludge in the bottom of the oil tank is - (answer)Water
To ensure clean, uncontaminated fuel reaches the oil burner you must - (answer)Install tanks
properly, regularly inspect and fix minor defects before they lead to major problems, and install a
quality oil filter
, Water in oil tanks come from - (answer)Condensation, loose or missing fill and vent caps, and
failing to drain water from a tank before installation
When installing an oil tank be sure: - (answer)The fill and vent lines are pitched towards the
tank, to install a vent alarm and a tank gauge, and to install an oil filter
Oil lines buried in concrete should be - (answer)Sleeved in plastic or PVC pipe with no fittings
below the floor
Fuel units (oil pumps) preform the following functions - (answer)Move oil from the tank to the
burner and deliver oil at a constant regulated pressure to the nozzle
The best way to clear a clogged oil line is to - (answer)Use a hand pump to pull the blockage out
If the oil level in the tank is 4 feet below the fuel unit in 10 feet away, the approximate vacuum
should be - (answer)5 - 6 inches
If the operating vacuum reading a significantly above the calculated vacuum, you probably have
a - (answer)Clogged oil filter
If the operating vacuum reading is significantly less than the calculated vacuum, you probably
have a - (answer)Suction line leak
It is best to connect your unit as a one pipe system instead of a 2 pipe system because -
(answer)One pipe leads to longer filter life and eliminates worries about leaking return lines
A fuel de-aerator: - (answer)Eliminates the need for a return line back to the tank
A cause of pulsating oil pump pressure and a pulsating fire is - (answer)Air leaks in the suction
line
COMPLETE QUESTIONS WITH EXPERT SOLUTIONS | 2026 LATEST
UPDATED | GET A+
The cross connection between two supply tanks shall not exceed? - (answer)660 gallons
When is an automatic draft control not required? - (answer)When the equipment is designed to
control the draft.
Combustion performance testing can indicate: - (answer)Improper air oil mixture, too much
combustion air, and low pump pressure.
If a second oil-burning appliance is installed in a single chimney, you must insure: -
(answer)Sufficient draft is available for safe operation of all connected equipment.
Delayed ignition can be caused by: - (answer)Weak ignition transformer
You should replace the oil burner nozzle with: - (answer)The manufacturers recommended
nozzle spray pattern and spray angle.
Viscosity problems can be corrected by: - (answer)Decreasing the nozzle size and increasing the
pump pressure accordingly
The minimum operating pressure of an oil pump is: - (answer)100 PSI
If a stack relay fails you, must? - (answer)Replace it with an approved type controller
Aquastats are normally found on what type of heating systems? - (answer)Hydronic
,Airstats are found on what type of heating systems? - (answer)Forced warm air systems
Under sized returns on a warm air system can result in what? - (answer)Short cycling of the oil
burner
Incorrect nozzle selection in regards to gallon per hour, can result in what problems in a steam
system? - (answer)Some radiators not heating quickly enough
Low boiler water temperature in a hydronic hot water system may be caused by? -
(answer)Undersized oil burner nozzles
Delayed opening oil valves are used to? - (answer)Allow oil pump to come up to speed
If a steam boiler is to be installed with an automatic feeder it must also have: - (answer)A
backflow prevention device
How can a damaged heat exchanger be detected on a forced warm air system? - (answer)With a
smoke trace candle
If a high limit is installed to prevent high boiler water temperature, what is the function of the
low limit? - (answer)To maintain temperature for domestic hot water
On a steam system, a plugged siphon loop can have what affect on the heating system? -
(answer)Insufficient heat in the living space
On a triple acting aquastat a minimum of 20 degrees is recommend between the high and low
limit, this will prevent? - (answer)The boiler going off on high limit before reaching the
minimum circulator temperature
An advantage of flame retention burner is - (answer)Their high static pressure enables boilers
and furnaces with tighter more efficient heat exchange passages
,The key final adjustment for most oil burners is - (answer)Combustion air
Dirt or lint buildup in the bevel of the burner fan blades will - (answer)Reduce the amount of
combustion air
To change the air ratio for different firing rates with an adjustable head burner you -
(answer)Adjust the position of the drawer assembly in the Air tube
All petroleum products are chemical compounds of - (answer)Hydrogen and carbon
1 gallon of #2 oil contains approximately how many BTU's? - (answer)140,000 BTU's
Flashpoint of a fuel is an indication of - (answer)The lowest temperature at which the fuel will
flash but not continue to burn
The pour point of #2 oil - (answer)Can be lowered by blending with kerosene, can be lowered
with fuel additives, and is the lowest temperature at which it will flow
Maximum fuel allowed without a license - (answer)10,000 gallons
Is heating oil gets colder its viscosity (thickness): - (answer)Increases
Sulfuric acid in combustion gases can: - (answer)Damon's the flue lines, it holds in the flue pipe,
and create a scale buildup in the heat exchanger
The home for bacterial growth and sludge in the bottom of the oil tank is - (answer)Water
To ensure clean, uncontaminated fuel reaches the oil burner you must - (answer)Install tanks
properly, regularly inspect and fix minor defects before they lead to major problems, and install a
quality oil filter
, Water in oil tanks come from - (answer)Condensation, loose or missing fill and vent caps, and
failing to drain water from a tank before installation
When installing an oil tank be sure: - (answer)The fill and vent lines are pitched towards the
tank, to install a vent alarm and a tank gauge, and to install an oil filter
Oil lines buried in concrete should be - (answer)Sleeved in plastic or PVC pipe with no fittings
below the floor
Fuel units (oil pumps) preform the following functions - (answer)Move oil from the tank to the
burner and deliver oil at a constant regulated pressure to the nozzle
The best way to clear a clogged oil line is to - (answer)Use a hand pump to pull the blockage out
If the oil level in the tank is 4 feet below the fuel unit in 10 feet away, the approximate vacuum
should be - (answer)5 - 6 inches
If the operating vacuum reading a significantly above the calculated vacuum, you probably have
a - (answer)Clogged oil filter
If the operating vacuum reading is significantly less than the calculated vacuum, you probably
have a - (answer)Suction line leak
It is best to connect your unit as a one pipe system instead of a 2 pipe system because -
(answer)One pipe leads to longer filter life and eliminates worries about leaking return lines
A fuel de-aerator: - (answer)Eliminates the need for a return line back to the tank
A cause of pulsating oil pump pressure and a pulsating fire is - (answer)Air leaks in the suction
line
