Oil Burner Study Guide: Questions and Answers, Exams of Engineering

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STUDY GUIDE 32 EXAM | QUESTIONS &

ANSWERS (VERIFIED) | LATEST UPDATE |

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Modern oil burners are referred to as high-pressure burners, as the oil is delivered through the burner at a pressure of about _____ psi. Correct answer: 100 psi The process of breaking up a liquid into fine droplets is called _____. Correct answer: atomization _____ is the amount of carbon left in a sample of oil after it is vaporized, changed from a liquid to a vapor, by blending it. Correct answer: Carbon residue The portion of a nozzle assembly that produces rotation of the oil spray is called the _____. Correct answer: swirl chamber Oil lines can be constructed of _____, _____ or _____ pipe connected with malleable fittings.

Correct answer: wrought iron, steel or brass If a technician inspects the interior of a combustion chamber and finds large quantities of unburned oil, he would correctly conclude that _____. Correct answer: incomplete combustion is taking place. The CAD cell is a safety device that uses which of the following to prove ignition? Correct answer: unknown A condensing oil furnace operates at a higher efficiency because part of the heat output is _____. Correct answer: latent heat To make combustion efficiency test, a hole must be made _____. Correct answer: unknown What would happen if the narrow spray angle nozzle were used in a round combustion chamber? Correct answer: unknown When the oil supply is above the oil burner pump, the pump and supply would normally be a _____. Correct answer: single stage pump

An auxiliary tank and booster pump system is required if the oil supply is _____ below the oil burner pump. Correct answer: 15ft or more Define atomization: Correct answer: The process of breaking down the liquid into fine droplets An oil burner equipped with the CAD cell relay will ignite, run for about ninety seconds, and cut off. What is the first thing the service technician should do? Correct answer: Clean the cell. The grade of fuel used in residential and light commercial units is _____. Correct answer: #2 (diesel) Improper combustion can lead to _____. Correct answer: unknown The number engraved on the nozzle indicates _____. Correct answer: the amount of fuel it will deliver. The stack switch or stack relay _____.

Correct answer: is a safety switch that shuts down the boiler if it does not sense heat in the flue box. Creates turbulence in the air-oil mixture to increase efficiency. Correct answer: flame retention ring insulated with ceramic to prevent electrical ground. Correct answer: electrodes Devices that will shut burner down in case the burner doesn't fire Correct answer: stack switch Meters flow of fuel oil into the chamber Correct answer: nozzle Generates approximately 10,000 volts needed for spark. Correct answer: ignition transformer