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Oil Burner License Exam/251 Questions and Answers/100% Verified
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Oil Burner License Exam/251 Questionsand Answers/100% Verified
What is the first thing a tech should do when arriving at a no combustion
call? - -Ask how many times the customer reset the unit.
-What is the best long term solution for preventing a clogged nozzle? - --
Remove any underground storage tanks.
-Install a quality oil filter.
-Cut the suction line 10" above the tank outlet to prevent sludge.
-Hot water and steam valves are interchangeable. - -False
-When in the presence of a flame, a cad cell normally reads.. - -300-1000
ohms
-If a pump is used to bring oil to a level higher than the tank, an oil safety
valve is required. - -True
-On a call where a hydronic heat system is putting out too much heat on the
stack, the issue may be.. - --Too much draft.
-Not enough combustion air in the equipment room.
-Air leakage into chamber.
-A high CO2 reading is caused by.. - -Incomplete combustion
-An often overlooked cause of a high CO2 reading is.. - -Not enough
combustion air in the equipment room.
-When multiple pumps are wired together in a heating system, they should
be wired in.. - -parallel
-In a series circuit.. - -Current has one path.
-When 2 burners are connected to the same chimney.. - -Sufficient draft
must be obtained to operate both units.
-The ignition transformer is located.. - -In the primary control.
-When safeties are wired in series one safety will affect the operation of the
others. - -True
-A stack switch is no longer allowed to be installed or replaced because.. - -
It's safety cutout time is higher than what is now required.
, -What is a power venter and what does it do? - -An electrical device that
sends fluid gases into the chimney connector.
-A burner in a confined space using 1 GPH of #2 fuel oil requires what size
permanent opening for combustion air? - -140"
-The difference between an adjustable flame retention burner and a fixed
flame retention burner is? - -Air inlets can be adjusted
Ignitor position can be adjusted
Fuel can be adjusted
-Oil tank design, construction, installation and testing shall be in accordance
with.. - -527 CMR 9.0
-Heat is a form of.. - -Energy
-If a burner is operational but the circulator pump isn't running.. - -The
pump relay is not working correctly
-A method of dealing with low viscosity/cold temps with #2 oil? - -Increase
pump pressure/ decrease nozzle size
-What is needed at the outlet of an oil tank? - -Thermal safety valve
-Where do you obtain an installation permit for oil burners? - -Fire Dept
-How many Btu's approximately in 1 gal of #2 fuel oil? - -140,000 btu's
-Solid state ignition is superior to spark because - -It is not affected by
reduced voltage
-What is an installation? - -The complete setting in place, ready for
operation, of an oil burner appliance together with its accessories and
equipment.
-How far must a power vent terminate from an opening or window? - -4'
-A pump in a one pipe system that is full of air can be self purged. - -False
-List the minimum size of an oil supply line. - -3/8"
-A material with electrons so loose it allows voltage to pass with little or no
resistance.. - -Is a conductor
, -If a high limit goes off, what does a low water switch do? - -Maintains water
temperature
-What is flashpoint an indicator of? - -Minimum temperature oil will ignite
but not continue to burn.
-What travels on the inside of the wire? - -Volts
-What does readily accessible mean pertaining to oil burning equipment? - -
Capable of being reached easily and quickly for operation, maintenance or
inspection.
-What is the minimum vent pipe on an oil tank? - -1 1/4"
-What causes corrosion on a flue pipe? - -When the flue pipe is operating
below the dew point temperature.
-What are the methods to prevent oil waxing? - -Put additives in the fuel.
Add an oil line heater.
Cut with #1 fuel or kerosene.
-What is the maximum tank size allowed inside unenclosed? - -660 gal
-What is the purpose of a delayed oil valve? - -Allows time for the oil pump
to get up to speed.
Delays oil flow to the nozzle.
-On a call where a hydronic heat system is putting out too much heat, the
issue could be? - -A shorted out thermostat.
-When measuring a cad cell with the burner running and the ff terminals
jumped out, what should the cad cell reading be? - -1600 ohms
-What are the possible causes of soot at or near the power venter? - -
Incomplete combustion
-What is a possible side effect of air in a nozzle line? - -Soot
-What is the cause if the cad cell is tripped on safety? - -Dirty cad cell
Faulty cad cell
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