Oil Furnace Heating Practice Tests- Answered

Oil Furnace Heating Practice Tests- Answered 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 chamber Malfunctions 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