MASSACHUSETTS OIL BURNER LICENSE NEWEST 2025
ACTUAL EXAM TEST BANK ( 3 VERSIONS) QUESTIONS
AND CORRECT DETAILED ANSWERS (VERIFIED
ANSWERS) |ALREADY GRADED A+
What is flashpoint an indicator of? - ANSWERS-Minimum temperature oil will ignite but not
continue to burn.
What travels on the inside of the wire? - ANSWERS-Volts
What does readily accessible mean pertaining to oil burning equipment? - ANSWERS-
Capable of being reached easily and quickly for operation, maintenance or inspection.
What is the minimum vent pipe on an oil tank? - ANSWERS-1 1/4"
What causes corrosion on a flue pipe? - ANSWERS-When the flue pipe is operating below
the dew point temperature.
What are the methods to prevent oil waxing? - ANSWERS-Put additives in the fuel.
Add an oil line heater.
Cut with #1 fuel or kerosene.
What is the maximum tank size allowed inside unenclosed? - ANSWERS-660 gal
What is the purpose of a delayed oil valve? - ANSWERS-Allows time for the oil pump to get
up to speed.
Delays oil flow to the nozzle.
On a call where a hydronic heat system is putting out too much heat, the issue could be? -
ANSWERS-A shorted out thermostat.
What is the first thing a tech should do when arriving at a no combustion call? -
ANSWERS-Ask how many times the customer reset the unit.
What is the best long term solution for preventing a clogged nozzle? - ANSWERS--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. - ANSWERS-False
,When in the presence of a flame, a cad cell normally reads.. - ANSWERS-300-1000 ohms
If a pump is used to bring oil to a level higher than the tank, an oil safety valve is required. -
ANSWERS-True
On a call where a hydronic heat system is putting out too much heat on the stack, the issue
may be.. - ANSWERS--Too much draft.
-Not enough combustion air in the equipment room.
-Air leakage into chamber.
A high CO2 reading is caused by.. - ANSWERS-Incomplete combustion
An often overlooked cause of a high CO2 reading is.. - ANSWERS-Not enough combustion
air in the equipment room.
When multiple pumps are wired together in a heating system, they should be wired in.. -
ANSWERS-parallel
In a series circuit.. - ANSWERS-Current has one path.
When 2 burners are connected to the same chimney.. - ANSWERS-Sufficient draft must be
obtained to operate both units.
The ignition transformer is located.. - ANSWERS-In the primary control.
When safeties are wired in series one safety will affect the operation of the others. -
ANSWERS-True
A stack switch is no longer allowed to be installed or replaced because.. - ANSWERS-It's
safety cutout time is higher than what is now required.
What is a power venter and what does it do? - ANSWERS-An electrical device that sends
fluid gases into the chimney connector.
A burner in a confined space using 1 GPH of #2 fuel oil requires what size permanent
opening for combustion air? - ANSWERS-140"
The difference between an adjustable flame retention burner and a fixed flame retention
burner is? - ANSWERS-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.. -
ANSWERS-527 CMR 9.0
Heat is a form of.. - ANSWERS-Energy
,If a burner is operational but the circulator pump isn't running.. - ANSWERS-The pump
relay is not working correctly
A method of dealing with low viscosity/cold temps with #2 oil? - ANSWERS-Increase pump
pressure/ decrease nozzle size
What is needed at the outlet of an oil tank? - ANSWERS-Thermal safety valve
Where do you obtain an installation permit for oil burners? - ANSWERS-Fire Dept
How many Btu's approximately in 1 gal of #2 fuel oil? - ANSWERS-140,000 btu's
Solid state ignition is superior to spark because - ANSWERS-It is not affected by reduced
voltage
What is an installation? - ANSWERS-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? - ANSWERS-4'
A pump in a one pipe system that is full of air can be self purged. - ANSWERS-False
List the minimum size of an oil supply line. - ANSWERS-3/8"
A material with electrons so loose it allows voltage to pass with little or no resistance.. -
ANSWERS-Is a conductor
If a high limit goes off, what does a low water switch do? - ANSWERS-Maintains water
temperature
When measuring a cad cell with the burner running and the ff terminals jumped out, what
should the cad cell reading be? - ANSWERS-1600 ohms
What are the possible causes of soot at or near the power venter? - ANSWERS-Incomplete
combustion
What is a possible side effect of air in a nozzle line? - ANSWERS-Soot
What is the cause if the cad cell is tripped on safety? - ANSWERS-Dirty cad cell
Faulty cad cell
No flame present
If a boiler is running but the water temperature is low? - ANSWERS-Undersized nozzle
If a boiler is at 30 psi and the relief valve opens? - ANSWERS-Expansion tank is
undersized
, Tank bladder is perforated
Tankless coil is leaking
Atomizing type burners were designed to burn which type of fuel? - ANSWERS-#2 oil
One gallon of #2 fuel oil contains approximately: - ANSWERS-140,000 BTU's
Pour point problems with outside above ground fuel tanks can be partially relived by: -
ANSWERS--Relocating the outside fuel filters and strainers to the inside
-Switching to #1 fuel oil
-Reducing the pour point of #2 fuel oil by blending it with #1 fuel oil
A fuel oil storage tank cannot be installed: - ANSWERS-In the furnace room within 5 feet of
the heating unit
The primary purpose of a fuel pump in a high pressure burner is to: - ANSWERS--Deliver
oil at a constant and regulated pressure to the nozzle
-Move oil from the tank to the pump
-Provide a screen to filter the oil
If the vacuum reading is substantially above the calculated reading, (with the burner
running) the cause may be: - ANSWERS--Plugged fuel filter
-Kinked oil supply line
-Check valve sticking
With most new flame retention burners, the motor speed is: - ANSWERS-3400 rpm
To check for a proper nozzle line cut-off, the pressure gauge is installed in the: -
ANSWERS-Nozzle port
Fuel units are generally set at the factory at: - ANSWERS-100 psi
The oil burner nozzle in a high pressure burner performs the following functions: -
ANSWERS--Atomizes the oil
-Provides a pattern of oil spray
-Delivers a fixed amount of oil
The nozzle flow rate, spray angle and pattern are directly related to: - ANSWERS--
Tangential slots
-Swirl chamber
-Orifice
Cold oil or high viscosity problems may be eliminated by: - ANSWERS--Increasing the
pump pressure and reducing the nozzle size
-Installing a nozzle line pre-heater
The following conditions or elements affect choosing the correct nozzle spray patterns: -
ANSWERS--Air-oil mixing design of the burner
ACTUAL EXAM TEST BANK ( 3 VERSIONS) QUESTIONS
AND CORRECT DETAILED ANSWERS (VERIFIED
ANSWERS) |ALREADY GRADED A+
What is flashpoint an indicator of? - ANSWERS-Minimum temperature oil will ignite but not
continue to burn.
What travels on the inside of the wire? - ANSWERS-Volts
What does readily accessible mean pertaining to oil burning equipment? - ANSWERS-
Capable of being reached easily and quickly for operation, maintenance or inspection.
What is the minimum vent pipe on an oil tank? - ANSWERS-1 1/4"
What causes corrosion on a flue pipe? - ANSWERS-When the flue pipe is operating below
the dew point temperature.
What are the methods to prevent oil waxing? - ANSWERS-Put additives in the fuel.
Add an oil line heater.
Cut with #1 fuel or kerosene.
What is the maximum tank size allowed inside unenclosed? - ANSWERS-660 gal
What is the purpose of a delayed oil valve? - ANSWERS-Allows time for the oil pump to get
up to speed.
Delays oil flow to the nozzle.
On a call where a hydronic heat system is putting out too much heat, the issue could be? -
ANSWERS-A shorted out thermostat.
What is the first thing a tech should do when arriving at a no combustion call? -
ANSWERS-Ask how many times the customer reset the unit.
What is the best long term solution for preventing a clogged nozzle? - ANSWERS--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. - ANSWERS-False
,When in the presence of a flame, a cad cell normally reads.. - ANSWERS-300-1000 ohms
If a pump is used to bring oil to a level higher than the tank, an oil safety valve is required. -
ANSWERS-True
On a call where a hydronic heat system is putting out too much heat on the stack, the issue
may be.. - ANSWERS--Too much draft.
-Not enough combustion air in the equipment room.
-Air leakage into chamber.
A high CO2 reading is caused by.. - ANSWERS-Incomplete combustion
An often overlooked cause of a high CO2 reading is.. - ANSWERS-Not enough combustion
air in the equipment room.
When multiple pumps are wired together in a heating system, they should be wired in.. -
ANSWERS-parallel
In a series circuit.. - ANSWERS-Current has one path.
When 2 burners are connected to the same chimney.. - ANSWERS-Sufficient draft must be
obtained to operate both units.
The ignition transformer is located.. - ANSWERS-In the primary control.
When safeties are wired in series one safety will affect the operation of the others. -
ANSWERS-True
A stack switch is no longer allowed to be installed or replaced because.. - ANSWERS-It's
safety cutout time is higher than what is now required.
What is a power venter and what does it do? - ANSWERS-An electrical device that sends
fluid gases into the chimney connector.
A burner in a confined space using 1 GPH of #2 fuel oil requires what size permanent
opening for combustion air? - ANSWERS-140"
The difference between an adjustable flame retention burner and a fixed flame retention
burner is? - ANSWERS-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.. -
ANSWERS-527 CMR 9.0
Heat is a form of.. - ANSWERS-Energy
,If a burner is operational but the circulator pump isn't running.. - ANSWERS-The pump
relay is not working correctly
A method of dealing with low viscosity/cold temps with #2 oil? - ANSWERS-Increase pump
pressure/ decrease nozzle size
What is needed at the outlet of an oil tank? - ANSWERS-Thermal safety valve
Where do you obtain an installation permit for oil burners? - ANSWERS-Fire Dept
How many Btu's approximately in 1 gal of #2 fuel oil? - ANSWERS-140,000 btu's
Solid state ignition is superior to spark because - ANSWERS-It is not affected by reduced
voltage
What is an installation? - ANSWERS-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? - ANSWERS-4'
A pump in a one pipe system that is full of air can be self purged. - ANSWERS-False
List the minimum size of an oil supply line. - ANSWERS-3/8"
A material with electrons so loose it allows voltage to pass with little or no resistance.. -
ANSWERS-Is a conductor
If a high limit goes off, what does a low water switch do? - ANSWERS-Maintains water
temperature
When measuring a cad cell with the burner running and the ff terminals jumped out, what
should the cad cell reading be? - ANSWERS-1600 ohms
What are the possible causes of soot at or near the power venter? - ANSWERS-Incomplete
combustion
What is a possible side effect of air in a nozzle line? - ANSWERS-Soot
What is the cause if the cad cell is tripped on safety? - ANSWERS-Dirty cad cell
Faulty cad cell
No flame present
If a boiler is running but the water temperature is low? - ANSWERS-Undersized nozzle
If a boiler is at 30 psi and the relief valve opens? - ANSWERS-Expansion tank is
undersized
, Tank bladder is perforated
Tankless coil is leaking
Atomizing type burners were designed to burn which type of fuel? - ANSWERS-#2 oil
One gallon of #2 fuel oil contains approximately: - ANSWERS-140,000 BTU's
Pour point problems with outside above ground fuel tanks can be partially relived by: -
ANSWERS--Relocating the outside fuel filters and strainers to the inside
-Switching to #1 fuel oil
-Reducing the pour point of #2 fuel oil by blending it with #1 fuel oil
A fuel oil storage tank cannot be installed: - ANSWERS-In the furnace room within 5 feet of
the heating unit
The primary purpose of a fuel pump in a high pressure burner is to: - ANSWERS--Deliver
oil at a constant and regulated pressure to the nozzle
-Move oil from the tank to the pump
-Provide a screen to filter the oil
If the vacuum reading is substantially above the calculated reading, (with the burner
running) the cause may be: - ANSWERS--Plugged fuel filter
-Kinked oil supply line
-Check valve sticking
With most new flame retention burners, the motor speed is: - ANSWERS-3400 rpm
To check for a proper nozzle line cut-off, the pressure gauge is installed in the: -
ANSWERS-Nozzle port
Fuel units are generally set at the factory at: - ANSWERS-100 psi
The oil burner nozzle in a high pressure burner performs the following functions: -
ANSWERS--Atomizes the oil
-Provides a pattern of oil spray
-Delivers a fixed amount of oil
The nozzle flow rate, spray angle and pattern are directly related to: - ANSWERS--
Tangential slots
-Swirl chamber
-Orifice
Cold oil or high viscosity problems may be eliminated by: - ANSWERS--Increasing the
pump pressure and reducing the nozzle size
-Installing a nozzle line pre-heater
The following conditions or elements affect choosing the correct nozzle spray patterns: -
ANSWERS--Air-oil mixing design of the burner
