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Oil furnace Questions and Answers100% Pass
What is the heating value of a number 2heating oil? ✔✔140,000 BTU/gallon What is the common operating pressure of a high-pressure oil burner? ✔✔100psig What is the secondary voltage of the ignition transformer used on a high-pressure oil burner? ✔✔10,000 volts
What is the purpose of an electrode in a high-pressure gas burner?spark to the point of ignition ✔✔It is used to carry the
What is the measurement of the spark gap on an electrode assembly? ✔✔1/8" The capacity of a high-pressure oil burner nozzle is rated in ✔✔GPH ( gallons per hour ) What are the three different spray patterns that are used on a nozzle?hollow ✔✔Solid, semihollow, and
The spray angle of an oil nozzle ranges from ✔✔30° to 90° What type of motor is used on a residential high-pressure oil burner? ✔✔Split phase What is the speed of the burner motor on a high-pressure gun burner? ✔✔1,725 or 3,450 rpm What is a common capacity of an indoor oil tank? ✔✔275 gallons What is the size of a fill pipe on an oil storage tank? ✔✔2" diameter What is the size of an air vent on an oil storage tank? ✔✔1 1/4" diameter What safety feature is used on an inside oil storage tank that will protect against a house fire? ✔✔A fuse-type globe valve
What effect, if any, would a decrease of primary air have on combustion?CO2 percentages ✔✔It would increase
What is the purpose of the barometric damper used on an oil-fired furnace?draft through the system ✔✔It controls the
What is the most common size oil line used on a residential oil-fired system? ✔✔3/8" OD What type of lubrication should be used in the burner motor of a high-pressure gun burner? ✔✔10-weight nondetergent-type oil
What is the purpose of a delayed oil valve? ✔✔It delays the oil pressure to the nozzle How is a delayed oil valve wired in a heating circuit?on a stack mount relay ✔✔It is connected across terminals 2 and 3
What are three products produced in the combustion process? ✔✔H2O, CO2, and N A high CO2 reading in an oil-fired furnace indicates ✔✔A hot fire
A common CO2 measurement for an oil-fired furnace is from ✔✔10 to 12% A common CO2 measurement for an gas-fired furnace is from ✔✔8.5 to 9.5% A common fire draft reading for an oil furnace would be ✔✔-.01" to -.02" WC A common breech draft for an oil furnace is ✔✔-.03" to -.06" WC If the draft through a furnace is too high, what adjustment should be made?barometric damper to more of a close position ✔✔Adjust the
A common smoke reading for and oil-fired furnace is ✔✔#1 to # What does a high smoke reading indicate on an oil-fired furnace? ✔✔Not enough primary air What does a low smoke reading indicate an oil-fired furnace? ✔✔Too much primary air A stack thermometer Commonly has a range from ✔✔200 to 1,000 F
