HOSMERIT
MASSACHUSETTS OIL BURNER EXAM QUESTIONS
AND DETAILED ANSWERS GRADE A
How is safety timing checked on a stack relay switch - ✔✔✔ Correct Answer > Remove the
stack relay from the duck and let it run .it should shut off in 45 seconds.
What is the safety lockout time on Burner firing under 3 gallonsper hour - ✔✔✔ Correct
Answer > 45 seconds
What control devices are found on gravity feed burners - ✔✔✔Correct Answer > Constant level
valve
When is a vent pipe required - ✔✔✔ Correct Answer > Whenthe Supply tank is larger than 10
gallons
What is the time limit for submitting certificate of completion -✔✔✔ Correct Answer > within
72 hours
What kinds of joints are used on tank installations - ✔✔✔Correct Answer > Swing joints
Why are swing joints used on oil tank installations - ✔✔✔Correct Answer > Shifting with in the
tank
,What is the minimum distance that the burner can be from thetank - ✔✔✔ Correct Answer > 5
feet
How many gallons of oil can be stored without a permit - ✔✔✔Correct Answer > 10 gallons or
less
How much outside or replacement air is needed in a confinedspace - ✔✔✔ Correct Answer > 1
square inch for 2000 BTUs
How much outside air or replacement air is needed in a boilerroom in of tight Construction -
✔✔✔ Correct Answer > 1 square inch per 1000 BTUs
What is the purpose of a heat anticipator - ✔✔✔ CorrectAnswer > It keeps the heat from
over shooting
Explain two different types of differentials used by thermostat -✔✔✔ Correct Answer > In
heating anticipates heat leftover.incold turns on compressor early
what are the parts of an ignition assembly explain the function of each part what is the
operating voltage - ✔✔✔ Correct Answer > Electrode :spark to ignite fuel. Transformer: step
up from 120 volts to 14000 hundred volts. porcelain are insulators.
When does code require low water cutoff - ✔✔✔ Correct Answer > Always on a steam boiler
,and when hot water heater has an input rating of 400,000 BTUs an hour or greater
What are the three functions of a pressure regulating valve on an oil pump - ✔✔✔ Correct
Answer > Maintain boiler pressureclean sharp cut off and Supply oil.
,Electrical current the amount of electricity flowing in a circuit ismeasured in - ✔✔✔ Correct
Answer > Amps
Advantage of PSC Motors over conventional split phase Motors is they - ✔✔✔ Correct Answer
> Are protected by an overload switch
Before using an electronic analyzer you must - ✔✔✔ Correct Answer > Performers smoke test
to be sure you're bringing at0 to trace of smoke
If a oil pumps gears are partially impeded by rust and difficult to turn it can cause - ✔✔✔
Correct Answer > The amperage draw of the burner motor to increase
The electric force or potential similar to water pressure is -✔✔✔ Correct Answer > Volts
We use motor delay our post Purge technology for - ✔✔✔Correct Answer > Cleaner shutdowns
What causes puff backs - ✔✔✔ Correct Answer > Delayedfaulty ignition
In oil burner circuits the high limit must be - ✔✔✔ Correct Answer > Line voltage and wired
in series with the primarycontrol
The maximum steam pressure needed to operate a residentialone pipe steam system is - ✔✔✔
Correct Answer > 2 psi
What problems does an oil film on the burner fan bladesindicate - ✔✔✔ Correct Answer >
Leaking pump seal
It is best to connect fuel units as a one pipe system instead of a two pipe system because - ✔✔✔
Correct Answer > One pipe 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 - ✔✔✔
Correct Answer > Adjustthe position of the drawer assembly in the air tube
Dirt & Lint built up in the bevel of the burner fan blades will -✔✔✔ Correct Answer > Reduce
the amount of combustion air
If the operating vacuum reading is significantly above the calculated vacuum you probably have
a - ✔✔✔ Correct Answer Clogged oil filter
A fuel deaerator - ✔✔✔ Correct Answer > Eliminates the needfor a return line back to the tank
All petroleum products are chemical compounds of - ✔✔✔Correct Answer > carbon and
hydrogen
If the oil level in the tank is 4 feet below the fuel unit and 10 feet away the approximate vacuum
should be - ✔✔✔ CorrectAnswer > -5 and -6 in
To calculate combustion efficiency we must know - ✔✔✔ Correct Answer > The net stack
temperature and excess airCO2 or O2
New CO2 reading of 7% at the bridge and 10% over the fireindicates - ✔✔✔ Correct Answer >
Air is leaking into the furnace or boiler heat exchanger
About 21% of air is made of - ✔✔✔ Correct Answer > Oxygen
When the combustion gases get too cold - ✔✔✔ CorrectAnswer > The water vapor in the flue
gases will condense
MASSACHUSETTS OIL BURNER EXAM QUESTIONS
AND DETAILED ANSWERS GRADE A
How is safety timing checked on a stack relay switch - ✔✔✔ Correct Answer > Remove the
stack relay from the duck and let it run .it should shut off in 45 seconds.
What is the safety lockout time on Burner firing under 3 gallonsper hour - ✔✔✔ Correct
Answer > 45 seconds
What control devices are found on gravity feed burners - ✔✔✔Correct Answer > Constant level
valve
When is a vent pipe required - ✔✔✔ Correct Answer > Whenthe Supply tank is larger than 10
gallons
What is the time limit for submitting certificate of completion -✔✔✔ Correct Answer > within
72 hours
What kinds of joints are used on tank installations - ✔✔✔Correct Answer > Swing joints
Why are swing joints used on oil tank installations - ✔✔✔Correct Answer > Shifting with in the
tank
,What is the minimum distance that the burner can be from thetank - ✔✔✔ Correct Answer > 5
feet
How many gallons of oil can be stored without a permit - ✔✔✔Correct Answer > 10 gallons or
less
How much outside or replacement air is needed in a confinedspace - ✔✔✔ Correct Answer > 1
square inch for 2000 BTUs
How much outside air or replacement air is needed in a boilerroom in of tight Construction -
✔✔✔ Correct Answer > 1 square inch per 1000 BTUs
What is the purpose of a heat anticipator - ✔✔✔ CorrectAnswer > It keeps the heat from
over shooting
Explain two different types of differentials used by thermostat -✔✔✔ Correct Answer > In
heating anticipates heat leftover.incold turns on compressor early
what are the parts of an ignition assembly explain the function of each part what is the
operating voltage - ✔✔✔ Correct Answer > Electrode :spark to ignite fuel. Transformer: step
up from 120 volts to 14000 hundred volts. porcelain are insulators.
When does code require low water cutoff - ✔✔✔ Correct Answer > Always on a steam boiler
,and when hot water heater has an input rating of 400,000 BTUs an hour or greater
What are the three functions of a pressure regulating valve on an oil pump - ✔✔✔ Correct
Answer > Maintain boiler pressureclean sharp cut off and Supply oil.
,Electrical current the amount of electricity flowing in a circuit ismeasured in - ✔✔✔ Correct
Answer > Amps
Advantage of PSC Motors over conventional split phase Motors is they - ✔✔✔ Correct Answer
> Are protected by an overload switch
Before using an electronic analyzer you must - ✔✔✔ Correct Answer > Performers smoke test
to be sure you're bringing at0 to trace of smoke
If a oil pumps gears are partially impeded by rust and difficult to turn it can cause - ✔✔✔
Correct Answer > The amperage draw of the burner motor to increase
The electric force or potential similar to water pressure is -✔✔✔ Correct Answer > Volts
We use motor delay our post Purge technology for - ✔✔✔Correct Answer > Cleaner shutdowns
What causes puff backs - ✔✔✔ Correct Answer > Delayedfaulty ignition
In oil burner circuits the high limit must be - ✔✔✔ Correct Answer > Line voltage and wired
in series with the primarycontrol
The maximum steam pressure needed to operate a residentialone pipe steam system is - ✔✔✔
Correct Answer > 2 psi
What problems does an oil film on the burner fan bladesindicate - ✔✔✔ Correct Answer >
Leaking pump seal
It is best to connect fuel units as a one pipe system instead of a two pipe system because - ✔✔✔
Correct Answer > One pipe 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 - ✔✔✔
Correct Answer > Adjustthe position of the drawer assembly in the air tube
Dirt & Lint built up in the bevel of the burner fan blades will -✔✔✔ Correct Answer > Reduce
the amount of combustion air
If the operating vacuum reading is significantly above the calculated vacuum you probably have
a - ✔✔✔ Correct Answer Clogged oil filter
A fuel deaerator - ✔✔✔ Correct Answer > Eliminates the needfor a return line back to the tank
All petroleum products are chemical compounds of - ✔✔✔Correct Answer > carbon and
hydrogen
If the oil level in the tank is 4 feet below the fuel unit and 10 feet away the approximate vacuum
should be - ✔✔✔ CorrectAnswer > -5 and -6 in
To calculate combustion efficiency we must know - ✔✔✔ Correct Answer > The net stack
temperature and excess airCO2 or O2
New CO2 reading of 7% at the bridge and 10% over the fireindicates - ✔✔✔ Correct Answer >
Air is leaking into the furnace or boiler heat exchanger
About 21% of air is made of - ✔✔✔ Correct Answer > Oxygen
When the combustion gases get too cold - ✔✔✔ CorrectAnswer > The water vapor in the flue
gases will condense
