What is the first thing a tech should do when arriving at a no combustion call? - Answer- Ask how many times the customer reset the unit.
What is the best long term solution for preventing a clogged nozzle? - Answer- -Remove any underground storage tanks.
-Install a quality oil filter.
-Cut ...
Oil Burner License Exam 2023 Questions and Answers What is the first thing a tech should do when arriving at a no combustion call? - Answer-
Ask how many times the customer reset the unit.
What is the best long term solution for preventing a clogged nozzle? - Answer- -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. - Answer- False
When in the presence of a flame, a cad cell normally reads.. - Answer- 300-1000 ohms
If a pump is used to bring oil to a level higher than the tank, an oil safety valve is required. - Answer- True
On a call where a hydronic heat system is putting out too much heat on the stack, the issue may be.. - Answer- -Too much draft. -Not enough combustion air in the equipment room. -Air leakage into chamber.
A high CO2 reading is caused by.. - Answer- Incomplete combustion
An often overlooked cause of a high CO2 reading is.. - Answer- Not enough combustion
air in the equipment room.
When multiple pumps are wired together in a heating system, they should be wired in.. -
Answer- parallel
In a series circuit.. - Answer- Current has one path.
When 2 burners are connected to the same chimney.. - Answer- Sufficient draft must be
obtained to operate both units.
The ignition transformer is located.. - Answer- In the primary control.
When safeties are wired in series one safety will affect the operation of the others. - Answer- True A stack switch is no longer allowed to be installed or replaced because.. - Answer- It's safety cutout time is higher than what is now required.
What is a power venter and what does it do? - Answer- 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? - Answer- 140"
The difference between an adjustable flame retention burner and a fixed flame retention
burner is? - Answer- 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.. - Answer- 527 CMR 9.0
Heat is a form of.. - Answer- Energy
If a burner is operational but the circulator pump isn't running.. - Answer- The pump relay is not working correctly
A method of dealing with low viscosity/cold temps with #2 oil? - Answer- Increase pump pressure/ decrease nozzle size
What is needed at the outlet of an oil tank? - Answer- Thermal safety valve
Where do you obtain an installation permit for oil burners? - Answer- Fire Dept
How many Btu's approximately in 1 gal of #2 fuel oil? - Answer- 140,000 btu's
Solid state ignition is superior to spark because - Answer- It is not affected by reduced voltage
What is an installation? - Answer- 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? - Answer- 4'
A pump in a one pipe system that is full of air can be self purged. - Answer- False
List the minimum size of an oil supply line. - Answer- 3/8" A material with electrons so loose it allows voltage to pass with little or no resistance.. - Answer- Is a conductor
If a high limit goes off, what does a low water switch do? - Answer- Maintains water temperature
What is flashpoint an indicator of? - Answer- Minimum temperature oil will ignite but not continue to burn.
What travels on the inside of the wire? - Answer- Volts
What does readily accessible mean pertaining to oil burning equipment? - Answer- Capable of being reached easily and quickly for operation, maintenance or inspection.
What is the minimum vent pipe on an oil tank? - Answer- 1 1/4"
What causes corrosion on a flue pipe? - Answer- When the flue pipe is operating below the dew point temperature.
What are the methods to prevent oil waxing? - Answer- 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? - Answer- 660 gal
What is the purpose of a delayed oil valve? - Answer- 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? - Answer- 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? - Answer- 1600 ohms
What are the possible causes of soot at or near the power venter? - Answer- Incomplete
combustion
What is a possible side effect of air in a nozzle line? - Answer- Soot
What is the cause if the cad cell is tripped on safety? - Answer- Dirty cad cell
Faulty cad cell
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