Oil Heat Exam Questions with Complete & Verified Solutions | 100 % Correct| 2024

Oil Heat Exam Questions with Complete & Verified Solutions | 100 % Correct| 2024 If a technician inspects the interior of a combustion chamber and finds large quantities of unburned oil, he would correctly conclude that ____. - Answer ️️ -The stack switch may be defective and the primary control unit may be defective A special tool has been designed to help remove and install nozzles from the burner. It is called a nozzle wrench and it ____. - Answer ️️ -Has an outer wrench that holds the burner in place, while the inner wrench holds the nozzle and minimize the chance of cracking the porcelain The number engraved on the nozzle indicates ____. - Answer ️️ -How many gallons of oil per hour the nozzle will deliver at a given input pressure Improper combustion can lead to ____. - Answer ️️ -Excessive carbon monoxide production, smoke condition around furnace, and wasted oil The grade of fuel usually used in residential and light commercial units is ____. - Answer ️️ -No. 2 When the oil supply is above the oil burner pump, the pump and supply would normally be a ____. - Answer ️️ -Single-stage pump, one pipe system An auxiliary tank and booster pump system is required if the oil supply is ____ below the oil burner pump. - Answer ️️ -15 feet or more The CAD cell is a safety device that uses which of the following to prove ignition? - Answer ️️ -Light in the combustion chamber The stack switch or stack relay ____. - Answer ️️ -Shuts down the burner if it does not sense heat in the flue products A condensing oil furnace operates at a higher efficiency because part of the heat output is ____. - Answer ️️ -Latent heat