Oil Burner License Questions with Complete Solutions (Latest 2025) What is the first thing a tech should do when arriving at a no combustion call? - Correct Answers ✅Ask how many times the customer reset the unit.What is the best long term solution for preventing a clogged nozzle? - Correct Answers ✅-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. - Correct Answers ✅False When in the presence of a flame, a cad cell normally reads.. - Correct Answers ✅300-1000 ohms If a pump is used to bring oil to a level higher than the tank, an oil safety valve is required. - Correct Answers ✅True On a call where a hydronic heat system is putting out too much heat on the stack, the issue may be.. - Correct Answers ✅-Too much draft.-Not enough combustion air in the equipment room.-Air leakage into chamber. 1 / 4
Oil Burner License Questions with Complete Solutions (Latest 2025) A high CO2 reading is caused by.. - Correct Answers ✅Incomplete combustion An often overlooked cause of a high CO2 reading is.. - Correct Answers ✅Not enough combustion air in the equipment room.When multiple pumps are wired together in a heating system, they should be wired in.. - Correct Answers ✅parallel In a series circuit.. - Correct Answers ✅Current has one path.When 2 burners are connected to the same chimney.. - Correct Answers ✅Sufficient draft must be obtained to operate both units.The ignition transformer is located.. - Correct Answers ✅In the primary control.When safeties are wired in series one safety will affect the operation of the others. - Correct Answers ✅True 2 / 4
Oil Burner License Questions with Complete Solutions (Latest 2025) A stack switch is no longer allowed to be installed or replaced because.. - Correct Answers ✅It's safety cutout time is higher than what is now required.What is a power venter and what does it do? - Correct Answers ✅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? - Correct Answers ✅140" The difference between an adjustable flame retention burner and a fixed flame retention burner is? - Correct Answers ✅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.. - Correct Answers ✅527 CMR 9.0 Heat is a form of.. - Correct Answers ✅Energy 3 / 4
Oil Burner License Questions with Complete Solutions (Latest 2025) If a burner is operational but the circulator pump isn't running.. - Correct Answers ✅The pump relay is not working correctly A method of dealing with low viscosity/cold temps with #2 oil? - Correct Answers ✅Increase pump pressure/ decrease nozzle size What is needed at the outlet of an oil tank? - Correct Answers ✅Thermal safety valve Where do you obtain an installation permit for oil burners? - Correct Answers ✅Fire Dept How many Btu's approximately in 1 gal of #2 fuel oil? - Correct Answers ✅140,000 btu's Solid state ignition is superior to spark because - Correct Answers ✅It is not affected by reduced voltage What is an installation? - Correct Answers ✅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? - Correct Answers ✅4'
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