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When a flame retention head burner is used, the smoke level be adjusted for Correct answer: zero smoke The highest AFUE rated oil furnace that a technician is likely is encounter is Correct answer: 86.5 A pulsating sound coming from an oil furnace indicates Correct answer: the flame is touching the combustion chamber If a furnace is found with a puddle of oil in the combustion chamber Correct answer:
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When a flame retention head burner is used, the smoke level be adjusted for Correct answer: zero smoke The highest AFUE rated oil furnace that a technician is likely is encounter is Correct answer: 86. A pulsating sound coming from an oil furnace indicates Correct answer: the flame is touching the combustion chamber If a furnace is found with a puddle of oil in the combustion chamber Correct answer: A two line oil piping system is used when the oil supply level is below the burner because Correct answer: b
The cad cell in an oil furnace performs the same function as which device in a gas furnace Correct answer: flame detector The component that turns the oil burner and blower on and off in response to external commands is the Correct answer: primary control In a furnace equipped with a solenoid oil flow valve,the valve will close when Correct answer: power is removed Which of these conditions can occur when the top of the chimney is lower than the surrounding structure Correct answer: downdraft Which of the following is the correct method for troubleshooting an electronic time delay? Correct answer: check the input and output voltages which condition is likely causing overheating Correct answer: nozzle to big If a varnish like substance has formed on the oil burner nozzle, what does it mean