Oil Furnace Heating Practice Test Exam With 100% Correct Answers 2025

Oil Furnace Heating Practice Test Exam With 100% Correct Answers 2025 1. Question 1 points Fuel Pump fail to prime when Suction inlet vacuum is greater than _______ of vacuum 20 inches 30 inches 15 inches 25 inches - answer-15 inches Which of the following is used to ignite the fuel oil in the heating system: Step down transformer Step up transformer - answer-Step up transformer Air enters the heating system in following order: from combustion chamber, to turbulator, to draft tube from draft tube, to turbulator, to combustion chamber from turbulator, to turbulator, to combustion chamber - answer-from draft tube, to turbulator, to combustion chamberMalfunctions in the heating system cause primary safety control to _______ electrical resistance across the cell until the burner is automatically shut off. reduce increase - answer-increase A ______ carbon dioxide content is usually caused by insufficient draft or an overfired burner low high - answer-high A _______ stack thermometer is generally used to measure the flue gas temperature in oil heating system: 200/2000°F 100/1000°F 200/1000°F 100/2000°F - answer-200/1000°F