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MASSACHUSETTS OIL BURNER LICENSE EXAM NEWEST 2025/2026
ACTUAL EXAM WITH COMPLETE QUESTIONS AND CORRECT
DETAILED ANSWERS (100% VERIFIED ANSWERS) |ALREADY
GRADED A+| ||PROFESSOR VERIFIED||
What additional requirements are there for installing two or more
tanks to a common discharge line - ANSWER-They must be on a
common slab at the same height and secure to one another
6 oil burners have been installed in a large room which is of tight
construction and which must be kept closed at all times there is
decidedly not enough combustion air for proper burner operation
there burner sizes are 1.35 gallons per hour under these
conditions what is the minimum free area of an opening
connecting to the outdoors which must be provided - ANSWER-
567 inch by 2 inch vent going to outside
what is the maximum voltage allowed for an oil burner circuit -
ANSWER-150 volts
Is carbon monoxide a desirable element in flue gases - ANSWER-
No
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How much air is needed to burn a gallon of fuel oil and why -
ANSWER-14.4 plus 50% 192 feet cubed 154 CF to ensure
enough oxygen
When visually adjusting the flame on an oil burner you should try
to get - ANSWER-An orange flame with red Flame tips
If a oil pumps gears are partially impeded by rust and difficult to
turn it can cause - ANSWER-The amperage draw of the burner
motor to increase
The electric force or potential similar to water pressure is -
ANSWER-Volts
We use motor delay our post Purge technology for - ANSWER-
Cleaner shutdowns
What causes puff backs - ANSWER-Delayed faulty ignition
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In oil burner circuits the high limit must be - ANSWER-line voltage
and wired in series with the primary control
The maximum steam pressure needed to operate a residential
one pipe steam system is - ANSWER-2 PSI
What problems does an oil film on the burner fan blades indicate -
ANSWER-Leaking pump seal
It is best to connect fuel units as a one pipe system instead of a
two pipe system because - ANSWER-One paper leads to longer
filter life and eliminates worries about leaking return lines
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
Dirt & Lint built up in the bevel of the burner fan blades will -
ANSWER-Reduce the amount of combustion air
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If the operating vacuum reading is significantly above the
calculated vacuum you probably have a - ANSWER-Clogged oil
filter
A fuel deaerator - ANSWER-eliminates the need for a return line
back to the tank
All petroleum products are chemical compounds of - ANSWER-
Hydrogen and carbon
If the oil level in the tank is 4 feet below the fuel unit and 10 feet
away the approximate vacuum should be - ANSWER-5 - 6 inches
To calculate combustion efficiency we must know - ANSWER-The
net stack temperature and excess air CO2 or O2
New CO2 reading of 7% at the bridge and 10% over the fire
indicates - ANSWER-Air is leaking into the furnace or boiler heat
exchanger
MASSACHUSETTS OIL BURNER LICENSE EXAM NEWEST 2025/2026
ACTUAL EXAM WITH COMPLETE QUESTIONS AND CORRECT
DETAILED ANSWERS (100% VERIFIED ANSWERS) |ALREADY
GRADED A+| ||PROFESSOR VERIFIED||
What additional requirements are there for installing two or more
tanks to a common discharge line - ANSWER-They must be on a
common slab at the same height and secure to one another
6 oil burners have been installed in a large room which is of tight
construction and which must be kept closed at all times there is
decidedly not enough combustion air for proper burner operation
there burner sizes are 1.35 gallons per hour under these
conditions what is the minimum free area of an opening
connecting to the outdoors which must be provided - ANSWER-
567 inch by 2 inch vent going to outside
what is the maximum voltage allowed for an oil burner circuit -
ANSWER-150 volts
Is carbon monoxide a desirable element in flue gases - ANSWER-
No
,2|Page
How much air is needed to burn a gallon of fuel oil and why -
ANSWER-14.4 plus 50% 192 feet cubed 154 CF to ensure
enough oxygen
When visually adjusting the flame on an oil burner you should try
to get - ANSWER-An orange flame with red Flame tips
If a oil pumps gears are partially impeded by rust and difficult to
turn it can cause - ANSWER-The amperage draw of the burner
motor to increase
The electric force or potential similar to water pressure is -
ANSWER-Volts
We use motor delay our post Purge technology for - ANSWER-
Cleaner shutdowns
What causes puff backs - ANSWER-Delayed faulty ignition
,3|Page
In oil burner circuits the high limit must be - ANSWER-line voltage
and wired in series with the primary control
The maximum steam pressure needed to operate a residential
one pipe steam system is - ANSWER-2 PSI
What problems does an oil film on the burner fan blades indicate -
ANSWER-Leaking pump seal
It is best to connect fuel units as a one pipe system instead of a
two pipe system because - ANSWER-One paper leads to longer
filter life and eliminates worries about leaking return lines
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
Dirt & Lint built up in the bevel of the burner fan blades will -
ANSWER-Reduce the amount of combustion air
, 4|Page
If the operating vacuum reading is significantly above the
calculated vacuum you probably have a - ANSWER-Clogged oil
filter
A fuel deaerator - ANSWER-eliminates the need for a return line
back to the tank
All petroleum products are chemical compounds of - ANSWER-
Hydrogen and carbon
If the oil level in the tank is 4 feet below the fuel unit and 10 feet
away the approximate vacuum should be - ANSWER-5 - 6 inches
To calculate combustion efficiency we must know - ANSWER-The
net stack temperature and excess air CO2 or O2
New CO2 reading of 7% at the bridge and 10% over the fire
indicates - ANSWER-Air is leaking into the furnace or boiler heat
exchanger
