1|Page
MASSACHUSETTS OIL BURNER LICENSE NEWEST
2026 ACTUAL EXAM TEST BANK 350 QUESTIONS
AND CORRECT DETAILED ANSWERS (VERIFIED
ANSWERS) |ALREADY GRADED A+||VERIFIED
EXAM!!!
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
,2|Page
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
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
,3|Page
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
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
, 4|Page
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
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
MASSACHUSETTS OIL BURNER LICENSE NEWEST
2026 ACTUAL EXAM TEST BANK 350 QUESTIONS
AND CORRECT DETAILED ANSWERS (VERIFIED
ANSWERS) |ALREADY GRADED A+||VERIFIED
EXAM!!!
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
,2|Page
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
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
,3|Page
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
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
, 4|Page
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
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
