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Oil furnaces questions and answers
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What is the purpose of the primary controller in an oil furnace? ✔✔The answer is IT CYCLES THE BURNER. The primary controller is an automatic safety device installed on every oil furnace to shut off the burner if the flame is out.
Oil furnaces are like gas furnaces in all of the following respects except A) fan/limit switch. B) blast tube. C) heat exchanger. D) ducts, registers, and grilles. ✔✔The answer is BLAST TUBE. The blast tube is a component of oil furnace burners but not gas furnace burners.
The maximum steady state efficiency for an oil burner is ✔✔The answer is 87%. The maximum steady state efficiency for an oil burner is about 87%.
Oil flows from an above ground exterior tank through a 2-inch pipe into the basement. Here it passes a shutoff valve and a union. The 3/8-inch copper line starts here and runs to the burner. What is missing? ✔✔The answer is A FUEL FILTER. A fuel filter is needed here.
You come across an oil furnace that has a tripped primary control. You should ✔✔The answer is NOT RESET THE PRIMARY CONTROL, AND ATTEMPT TO VIEW THE FIREPOT FOR POOLING OIL. You should be looking for pooling oil in the firepot. You should not reset the primary control. This may contribute to flooding the firepot.
The viewport shows that the back wall of the ceramic felt combustion chamber is no longer white. It is browned and stained. What is the likely cause of this discoloration? ✔✔The answer is SATURATION OF THE CERAMIC FELT WITH OIL. A ceramic felt combustion chamber that is brown and stained is probably saturated with oil.
The heat content of one gallon of No. 2 heating oil is approximately ✔✔The answer is 140, BTU. One gallon of #2 heating oil contains approximately 140,000 BTU.
Common problems with oil fill and vent pipes do not include A)
The barometric damper for a conventional efficiency oil furnace is found on the ✔✔The answer is EXHAUST FLUE. The barometric damper is on the exhaust flue.
The primary control on a modern flame-retention head oil burner is typically found ✔✔The answer is ON THE BURNER. The primary control is on the burner on a retention head system
All of the following are common vent connector issues on oil furnaces except A) loose fittings at plastic connections. B) poor connection to chimney. C) poor support. D) poor slope ✔✔The answer is LOOSE FITTINGS AT PLASTIC CONNECTIONS. Loose fittings at plastic connections are not an issue on oil furnaces. Plastic connections would not be used on vent connectors for oil furnaces.
All of the following are common oil supply line problems except A) undersized. B) excess elevation change. C) corrosion or mechanical damage. D)
leak. ✔✔The answer is EXCESS ELEVATION CHANGE. Excessive elevation change is not a common oil supply line problem. A fuel filter is needed in this arrangement.
What is the typical residential oil burner pump pressure? ✔✔The answer is 80 PSI. The oil burner pump pressure is in the range of 75 to 100 psi, so 80 psi is the best answer among the choices in this question
The oil vent pipe allows ✔✔The answer is AIR TO ESCAPE FROM THE TANK WHEN THE TANK IS FILLED. The oil vent pipe allows the air in the tank to escape during filling of the tank.
