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Massachusetts Oil Burner License Exam 2025 – Complete Study
Guide, Practice Test, and DFS Licensing Requirements
Prepare for the Massachusetts Oil Burner License Exam 2025 with this official study guide
and practice test. Learn about Massachusetts fire codes, fuel oil regulations, burner installation
standards, and safety procedures to pass the DFS exam and become a licensed oil burner
technician.
Massachusetts oil burner license exam 2025
Massachusetts oil burner technician license
MA oil burner license requirements
Massachusetts fire services oil burner exam
What is a low limit used for on a steam boiler or hot water boiler - ANSWER-It maintains the water temp
in the boiler
How are primary controls wired - ANSWER-L Black L2 white Terminal 3 goes to the burner motor
Terminal 4 goes to interrupted ignition all must be flexible
What is a reverse acting aquastat used for on a hot water boiler - ANSWER-Normal open switch that
close on temperature rise to operate circulators
What two problems will a vacuum test reveal - ANSWER-1 an air leak 2 restriction in the pipe
What causes a whining sound in a pump - ANSWER-High vacuum pressure. (it must be air bound, too
much air in the line.) line needs to be bled out.
What should the smoke test before a properly tuned Appliance - ANSWER-Zero two a Trace
,2|Page
What is a sword - ANSWER-A clean device that is a three to four foot long with a handle it also has a saw
blade looking thing on the other end is used in tight spaces or brushes can't reach
What is the purpose of a reverse acting control - ANSWER-To prevent cold water from being circulated
on cold start
Explain how a burner should be piped when the supply tank is located below the burner - ANSWER-2.
Pipe dual stage with a bypass plug
How should a stack switch be installed according to 527 CMR 4.00 - ANSWER-With a flexible conduit
Why should a stack switch not be rigidly mounted - ANSWER-So you can pull it out and check it
What are the purposes of a hot and cold contacts in stack switches - ANSWER-Hot: as they heat up hot
contacts close .Cold: normally closed switches open when heat heats them up.
What is delayed ignition - ANSWER-Fuel introduced to the combustion chamber before ignition
What are two causes of delayed ignition - ANSWER-The igniter electrodes or weak Transformer
how is a cad cell primary control relay put in step - ANSWER-The reset button
On domestic oil tanks when is it necessary to install a vent alarm - ANSWER-On tanks greater than 10
gallons
Must every fuel tank have a gauge - ANSWER-No .only on tanks greater than 10 gallons.
What is the Pensky Martens test - ANSWER-It's a Flashpoint test
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List all requirements for the fill and vent pipes - ANSWER-Swing joints on the fill pipe minimum of one
and one-quarter inch and the vent has to be as large or larger than the fill. vent must be two feet away
from any opening in the house and it must be three feet off grade
List all the devices necessary for safe operation of a forced hot water system with domestic start from
the fuse box - ANSWER-Fuse box emergency switch thermal cut-out service which limit switch primary
control
How is a safety lockout determined on a stack switch without removing it from its holder - ANSWER-
Remove the third terminal
Is CO2 test determines - ANSWER-The percentage of carbon dioxide in the flue gas
When Shall steam heating boiler and a hot water boiler require inspection by the commissioner of mass
Dept of Public Safety before it is put into service - ANSWER-Any time a permit is pulled to install or alter
a burner
Where is the check valve installed on a two pipe system when there is a lift situation - ANSWER-As close
to the tank as possible supply-side
How many seconds must have primary safety control shut off the burner - ANSWER-Firing Less Than 3
gallons per hour 45 seconds firing 3 - 7 gallons per hour 15 seconds
What is normal pump pressure - ANSWER-100 PSI
What would be the advantages of a pump pressure higher than 100 PSI - ANSWER-A cleaner burn
What determines the size of a nozzle gallons per hour - ANSWER-The maximum firing rate
What is the purpose of a draft regulator - ANSWER-To get the proper amount of air flow through the
burner
Massachusetts Oil Burner License Exam 2025 – Complete Study
Guide, Practice Test, and DFS Licensing Requirements
Prepare for the Massachusetts Oil Burner License Exam 2025 with this official study guide
and practice test. Learn about Massachusetts fire codes, fuel oil regulations, burner installation
standards, and safety procedures to pass the DFS exam and become a licensed oil burner
technician.
Massachusetts oil burner license exam 2025
Massachusetts oil burner technician license
MA oil burner license requirements
Massachusetts fire services oil burner exam
What is a low limit used for on a steam boiler or hot water boiler - ANSWER-It maintains the water temp
in the boiler
How are primary controls wired - ANSWER-L Black L2 white Terminal 3 goes to the burner motor
Terminal 4 goes to interrupted ignition all must be flexible
What is a reverse acting aquastat used for on a hot water boiler - ANSWER-Normal open switch that
close on temperature rise to operate circulators
What two problems will a vacuum test reveal - ANSWER-1 an air leak 2 restriction in the pipe
What causes a whining sound in a pump - ANSWER-High vacuum pressure. (it must be air bound, too
much air in the line.) line needs to be bled out.
What should the smoke test before a properly tuned Appliance - ANSWER-Zero two a Trace
,2|Page
What is a sword - ANSWER-A clean device that is a three to four foot long with a handle it also has a saw
blade looking thing on the other end is used in tight spaces or brushes can't reach
What is the purpose of a reverse acting control - ANSWER-To prevent cold water from being circulated
on cold start
Explain how a burner should be piped when the supply tank is located below the burner - ANSWER-2.
Pipe dual stage with a bypass plug
How should a stack switch be installed according to 527 CMR 4.00 - ANSWER-With a flexible conduit
Why should a stack switch not be rigidly mounted - ANSWER-So you can pull it out and check it
What are the purposes of a hot and cold contacts in stack switches - ANSWER-Hot: as they heat up hot
contacts close .Cold: normally closed switches open when heat heats them up.
What is delayed ignition - ANSWER-Fuel introduced to the combustion chamber before ignition
What are two causes of delayed ignition - ANSWER-The igniter electrodes or weak Transformer
how is a cad cell primary control relay put in step - ANSWER-The reset button
On domestic oil tanks when is it necessary to install a vent alarm - ANSWER-On tanks greater than 10
gallons
Must every fuel tank have a gauge - ANSWER-No .only on tanks greater than 10 gallons.
What is the Pensky Martens test - ANSWER-It's a Flashpoint test
, 3|Page
List all requirements for the fill and vent pipes - ANSWER-Swing joints on the fill pipe minimum of one
and one-quarter inch and the vent has to be as large or larger than the fill. vent must be two feet away
from any opening in the house and it must be three feet off grade
List all the devices necessary for safe operation of a forced hot water system with domestic start from
the fuse box - ANSWER-Fuse box emergency switch thermal cut-out service which limit switch primary
control
How is a safety lockout determined on a stack switch without removing it from its holder - ANSWER-
Remove the third terminal
Is CO2 test determines - ANSWER-The percentage of carbon dioxide in the flue gas
When Shall steam heating boiler and a hot water boiler require inspection by the commissioner of mass
Dept of Public Safety before it is put into service - ANSWER-Any time a permit is pulled to install or alter
a burner
Where is the check valve installed on a two pipe system when there is a lift situation - ANSWER-As close
to the tank as possible supply-side
How many seconds must have primary safety control shut off the burner - ANSWER-Firing Less Than 3
gallons per hour 45 seconds firing 3 - 7 gallons per hour 15 seconds
What is normal pump pressure - ANSWER-100 PSI
What would be the advantages of a pump pressure higher than 100 PSI - ANSWER-A cleaner burn
What determines the size of a nozzle gallons per hour - ANSWER-The maximum firing rate
What is the purpose of a draft regulator - ANSWER-To get the proper amount of air flow through the
burner
