OIL BURNER LICENSE EXAM AND PRACTICE
EXAM NEWEST ACTUAL EXAM COMPLETE 250
QUESTIONS AND CORRECT DETAILED ANSWERS
(VERIFIED ANSWERS) |ALREADY GRADED A+
What is the first thing a tech should do when arriving at a no combustion call? -
ANSWER Ask how many times the customer reset the unit.
What is the best long term solution for preventing a clogged nozzle? - 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. - ANSWER False
When in the presence of a flame, a cad cell normally reads.. - 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. - ANSWER True
On a call where a hydronic heat system is putting out too much heat on the stack, the
issue may be.. - ANSWER -Too much draft.
-Not enough combustion air in the equipment room.
-Air leakage into chamber.
A high CO2 reading is caused by.. - ANSWER Incomplete combustion
An often overlooked cause of a high CO2 reading is.. - ANSWER Not enough
combustion air in the equipment room.
When multiple pumps are wired together in a heating system, they should be wired in.. -
ANSWER parallel
In a series circuit.. - ANSWER Current has one path.
When 2 burners are connected to the same chimney.. - ANSWER Sufficient draft must
be obtained to operate both units.
The ignition transformer is located.. - ANSWER In the primary control.
,When safeties are wired in series one safety will affect the operation of the others. -
ANSWER True
A stack switch is no longer allowed to be installed or replaced because.. - ANSWER It's
safety cutout time is higher than what is now required.
What is a power venter and what does it do? - ANSWER 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? - ANSWER 140"
The difference between an adjustable flame retention burner and a fixed flame retention
burner is? - 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.. -
ANSWER 527 CMR 9.0
Heat is a form of.. - ANSWER Energy
If a burner is operational but the circulator pump isn't running.. - ANSWER The pump
relay is not working correctly
A method of dealing with low viscosity/cold temps with #2 oil? - ANSWER Increase
pump pressure/ decrease nozzle size
What is needed at the outlet of an oil tank? - ANSWER Thermal safety valve
Where do you obtain an installation permit for oil burners? - ANSWER Fire Dept
How many Btu's approximately in 1 gal of #2 fuel oil? - ANSWER 140,000 btu's
Solid state ignition is superior to spark because - ANSWER It is not affected by reduced
voltage
What is an installation? - 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? - ANSWER 4'
A pump in a one pipe system that is full of air can be self purged. - ANSWER False
, List the minimum size of an oil supply line. - ANSWER 3/8"
A material with electrons so loose it allows voltage to pass with little or no resistance.. -
ANSWER Is a conductor
If a high limit goes off, what does a low water switch do? - ANSWER Maintains water
temperature
What is flashpoint an indicator of? - ANSWER Minimum temperature oil will ignite but
not continue to burn.
What travels on the inside of the wire? - ANSWER Volts
What does readily accessible mean pertaining to oil burning equipment? - ANSWER
Capable of being reached easily and quickly for operation, maintenance or inspection.
What is the minimum vent pipe on an oil tank? - ANSWER 1 1/4"
What causes corrosion on a flue pipe? - ANSWER When the flue pipe is operating
below the dew point temperature.
What are the methods to prevent oil waxing? - ANSWER 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? - ANSWER 660 gal
What is the purpose of a delayed oil valve? - ANSWER 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? - ANSWER A shorted out thermostat.
When measuring a cad cell with the burner running and the ff terminals jumped out,
what should the cad cell reading be? - ANSWER 1600 ohms
What are the possible causes of soot at or near the power venter? - ANSWER
Incomplete combustion
What is a possible side effect of air in a nozzle line? - ANSWER Soot
What is the cause if the cad cell is tripped on safety? - ANSWER Dirty cad cell
EXAM NEWEST ACTUAL EXAM COMPLETE 250
QUESTIONS AND CORRECT DETAILED ANSWERS
(VERIFIED ANSWERS) |ALREADY GRADED A+
What is the first thing a tech should do when arriving at a no combustion call? -
ANSWER Ask how many times the customer reset the unit.
What is the best long term solution for preventing a clogged nozzle? - 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. - ANSWER False
When in the presence of a flame, a cad cell normally reads.. - 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. - ANSWER True
On a call where a hydronic heat system is putting out too much heat on the stack, the
issue may be.. - ANSWER -Too much draft.
-Not enough combustion air in the equipment room.
-Air leakage into chamber.
A high CO2 reading is caused by.. - ANSWER Incomplete combustion
An often overlooked cause of a high CO2 reading is.. - ANSWER Not enough
combustion air in the equipment room.
When multiple pumps are wired together in a heating system, they should be wired in.. -
ANSWER parallel
In a series circuit.. - ANSWER Current has one path.
When 2 burners are connected to the same chimney.. - ANSWER Sufficient draft must
be obtained to operate both units.
The ignition transformer is located.. - ANSWER In the primary control.
,When safeties are wired in series one safety will affect the operation of the others. -
ANSWER True
A stack switch is no longer allowed to be installed or replaced because.. - ANSWER It's
safety cutout time is higher than what is now required.
What is a power venter and what does it do? - ANSWER 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? - ANSWER 140"
The difference between an adjustable flame retention burner and a fixed flame retention
burner is? - 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.. -
ANSWER 527 CMR 9.0
Heat is a form of.. - ANSWER Energy
If a burner is operational but the circulator pump isn't running.. - ANSWER The pump
relay is not working correctly
A method of dealing with low viscosity/cold temps with #2 oil? - ANSWER Increase
pump pressure/ decrease nozzle size
What is needed at the outlet of an oil tank? - ANSWER Thermal safety valve
Where do you obtain an installation permit for oil burners? - ANSWER Fire Dept
How many Btu's approximately in 1 gal of #2 fuel oil? - ANSWER 140,000 btu's
Solid state ignition is superior to spark because - ANSWER It is not affected by reduced
voltage
What is an installation? - 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? - ANSWER 4'
A pump in a one pipe system that is full of air can be self purged. - ANSWER False
, List the minimum size of an oil supply line. - ANSWER 3/8"
A material with electrons so loose it allows voltage to pass with little or no resistance.. -
ANSWER Is a conductor
If a high limit goes off, what does a low water switch do? - ANSWER Maintains water
temperature
What is flashpoint an indicator of? - ANSWER Minimum temperature oil will ignite but
not continue to burn.
What travels on the inside of the wire? - ANSWER Volts
What does readily accessible mean pertaining to oil burning equipment? - ANSWER
Capable of being reached easily and quickly for operation, maintenance or inspection.
What is the minimum vent pipe on an oil tank? - ANSWER 1 1/4"
What causes corrosion on a flue pipe? - ANSWER When the flue pipe is operating
below the dew point temperature.
What are the methods to prevent oil waxing? - ANSWER 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? - ANSWER 660 gal
What is the purpose of a delayed oil valve? - ANSWER 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? - ANSWER A shorted out thermostat.
When measuring a cad cell with the burner running and the ff terminals jumped out,
what should the cad cell reading be? - ANSWER 1600 ohms
What are the possible causes of soot at or near the power venter? - ANSWER
Incomplete combustion
What is a possible side effect of air in a nozzle line? - ANSWER Soot
What is the cause if the cad cell is tripped on safety? - ANSWER Dirty cad cell
