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MASSACHUSETTS OIL BURNER TEST EXAM
NEWEST ACTUAL EXAM WITH COMPLETE
QUESTIONS AND DETAILED ANSWERS
GRADED A | BRAND NEW!!!
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 gallons
per 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 > When
the 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 the
tank - ✔✔✔ 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 confined
space - ✔✔✔ Correct Answer > 1 square inch for 2000 BTUs
How much outside air or replacement air is needed in a boiler
room in of tight Construction - ✔✔✔ Correct Answer > 1
square inch per 1000 BTUs
What is the purpose of a heat anticipator - ✔✔✔ Correct
Answer > It keeps the heat from over shooting
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 at 0 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 > Delayed
faulty ignition
In oil burner circuits the high limit must be - ✔✔✔ Correct
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 - ✔✔✔ Correct Answer > 2 psi
What problems does an oil film on the burner fan blades
indicate - ✔✔✔ 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 > Adjust
the 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
About 21% of air is made of - ✔✔✔ Correct Answer > Oxygen
When the combustion gases get too cold - ✔✔✔ Correct
Answer > The water vapor in the flue gases will condense
Nozzle after drip can be caused by - ✔✔✔ Correct Answer > A
defective pressure regulating valve. air in The Nozzle line. oil expansion in the nozzle line after shutdown.
We use O2 and CO2 measurements to calculate - ✔✔✔ Correct
Answer > The amount of excess air in the combustion gases
The flow rate stamped on the nozzle is based on - ✔✔✔ Correct
Answer > 100 psi The hole in the flue pipe for combustion testing should be -
✔✔✔ Correct Answer > As close to the breech of the heating
unit as possible When using a pump type smoke tester 10 strokes are necessary
to - ✔✔✔ Correct Answer > Eliminate any moisture on the
tester paper. clear tester air .draw the proper amount of fuel gas threw the paper.
A combustion efficiency test includes measurements of - ✔✔✔
Correct Answer > Stack temperature smoke test and excess of air
Power ventors use - ✔✔✔ Correct Answer > A fan to pull
combustion products through the heat exchanger and out of the building Excessive draft drop through the heat exchanger indicates -
✔✔✔ Correct Answer > Heavy set and scale deposits in the
heat exchanger
Which condition affects nozzle spray droplet size - ✔✔✔
Correct Answer > Fuel pump pressure To burn 1 pound of fuel oil it takes how many pounds of air -
✔✔✔ Correct Answer > 14.4 pounds
In a forced warm air system the return air duct size should
never be less than blank of the air duct size - ✔✔✔ Correct
Answer > 80% In a burner that has been properly set up and adjusted it will experience and occasional hard start of puff back the problem
May be - ✔✔✔ Correct Answer > Low voltage input to the
Transformer Power ventors that are installed inside of a structure should be
- ✔✔✔ Correct Answer > Mounted as close to the outside wall as possible when the installation instructions call for a draft regulator with
a power vent system it should be installed - ✔✔✔ Correct
Answer > Between the boiler or furnace and a power Venter In a blank system the radiator Supply and return pipe are
connected to one common main - ✔✔✔ Correct Answer > 1
pipe monoflo
when using a blank heater it is necessary to maintain sufficient boiling water temperature to heat the domestic hot water -
✔✔✔ Correct Answer > Tankless heater
One method for removing oil and dirt from a newly-installed
steam boiler is to - ✔✔✔ Correct Answer > Skim the boiler
through the nipple at the water level after a few days of operation If I cadcell is seeing light when a thermostat conneted to the
terminal TT terminals calls for heat - ✔✔✔ Correct Answer >
The primary control will not energize Increasing the air intake in order to achieve a cleaner fire will
also increase the - ✔✔✔ Correct Answer > Flue gas
temperature A single stationary conductor in the flux of a permanent
magnet will - ✔✔✔ Correct Answer > induce a current flow.
An advantage of flame retention burner is - ✔✔✔ Correct
Answer > The high static pressure enables boilers and furnaces with tighter more efficient heat exchanger passages
What happens once a PSC motor starts - ✔✔✔ Correct Answer
> The capacitor the auxiliary windings and the mainliners remain in circuit while the motor is running why would the burner on a furnace short cycle off the high limit
control - ✔✔✔ Correct Answer > The air filters are dirty
What happens when you decrease the amount of excess air -
✔✔✔ Correct Answer > Lowers that stack temperature &
increases efficiency
Why should we do a heat loss calculation - ✔✔✔ Correct
Answer > To match the boiler or furnace output to the heat load of the building to reduce off-cycle losses from oversizing to reduce cycling losses and increase run times The cross connection between two supply tanks shall not
exceed? - ✔✔✔ Correct Answer > 660 gallons
When is an automatic draft control not required? - ✔✔✔
Correct Answer > When the equipment is designed to control the draft.
Combustion performance testing can indicate - ✔✔✔ Correct
Answer > Improper air oil mixture, too much combustion air, and low pump pressure. If a second oil-burning appliance is installed in a single chimney,
you must insure - ✔✔✔ Correct Answer > Sufficient draft is
available for safe operation of all connected equipment.
Delayed ignition can be caused by - ✔✔✔ Correct Answer >
Weak ignition transformer
You should replace the oil burner nozzle with - ✔✔✔ Correct
Answer > The manufacturers recommended nozzle spray pattern and spray angle.
Viscosity problems can be corrected by - ✔✔✔ Correct Answer
> Decreasing the nozzle size and increasing the pump pressure accordingly
The minimum operating pressure of an oil pump is - ✔✔✔
Correct Answer > 100psi
If a steam boiler is to be installed with an automatic feeder it
must also have - ✔✔✔ Correct Answer > Backflow prevention
device How can a damaged heat exchanger be detected on a forced
warm air system? - ✔✔✔ Correct Answer > With a smoke trace
candle If a high limit is installed to prevent high boiler water
temperature, what is the function of the low limit? - ✔✔✔
Correct Answer > To maintain temperature for domestic hot water On a steam system, a plugged siphon loop can have what affect
on the heating system - ✔✔✔ Correct Answer > Insufficient
heat in the living space On a triple acting aquastat a minimum of 20 degrees is recommend between the high and low limit, this will prevent? -
✔✔✔ Correct Answer > The boiler going off on high limit
before reaching the minimum circulator temperature
An advantage of flame retention burner is - ✔✔✔ Correct
Answer > Their high static pressure enables boilers and furnaces with tighter more efficient heat exchange passages
The key final adjustment for most oil burners is - ✔✔✔ Correct
Answer > combustion air Dirt or lint buildup in the bevel of the burner fan blades will -
✔✔✔ Correct Answer > Reduce the amount of combustion air
Flashpoint of a fuel is an indication of - ✔✔✔ Correct Answer >
The lowest temperature at which the fuel will flash but not continue to burn
The pour point of #2 oil - ✔✔✔ Correct Answer > Can be
lowered by blending with kerosene, can be lowered with fuel additives, and is the lowest temperature at which it will flow
Maximum fuel allowed without a license - ✔✔✔ Correct
Answer > 10,000 gallons
Oil lines buried in concrete should be - ✔✔✔ Correct Answer >
Sleeved in plastic or PVC pipe with no fittings below the floor
Fuel units (oil pumps) preform the following functions - ✔✔✔
Correct Answer > Move oil from the tank to the burner and deliver oil at a constant regulated pressure to the nozzle
The best way to clear a clogged oil line is to - ✔✔✔ Correct
Answer > Use a hand pump to pull the blockage out If the operating vacuum reading a significantly above the
calculated vacuum, you probably have a - ✔✔✔ Correct
Answer > clogged oil filter If the operating vacuum reading is significantly less than the
calculated vacuum, you probably have a - ✔✔✔ Correct
Answer > suction line leak A cause of pulsating oil pump pressure and a pulsating fire is -
✔✔✔ Correct Answer > Air leaks in the suction liners
Increasing the fuel pump pressure will - ✔✔✔ Correct Answer >
Increase the flow-rate.
The purpose of an oil burner nozzle is to - ✔✔✔ Correct
Answer > Atomize the oil, provide a pattern of oil spray, and meter the amount of oil burned
When replacing nozzle - ✔✔✔ Correct Answer > Follow the
manufacturer's recommendations
To reduce combustion problems caused by cold oil - ✔✔✔
Correct Answer > Increase the pump pressure, install a nozzle line pre-heater, and use additives or kerosene to lower viscosity
A proper combustion chamber - ✔✔✔ Correct Answer > Is
large enough so the fire doesn't touch (impinge on) any surface, reflects heat back into the fire, and is made of material (like ceramic) that heats up quickly and cools off quickly
Too much draft over the fire can occur when - ✔✔✔ Correct
Answer > There are leaks between the sections of the boiler that let basement air into the heat exchanger
