Massachusetts Oil burner Practice Exam Questions and Answers 100% Verified

Viscosity problems can be corrected by: - ANSWER-Decreasing the nozzle size and increasing the pump pressure accordingly The minimum operating pressure of an oil pump is: - ANSWER-100 PSI If a stack relay fails you, must? - ANSWER-Replace it with an approved type controller Aquastats are normally found on what type of heating systems? - ANSWER-Hydronic Airstats are found on what type of heating systems? - ANSWER-Forced warm air systems Under sized returns on a warm air system can result in what? - ANSWER-Short cycling of the oil burner Incorrect nozzle selection in regards to gallon per hour, can result in what problems in a steam system? - ANSWER-Some radiators not heating quickly enough Low boiler water temperature in a hydronic hot water system may be caused by? - ANSWER-Undersized oil burner nozzles Delayed opening oil valves are used to? - ANSWER-Allow oil pump to come up to speed If a steam boiler is to be installed with an automatic feeder it must also have: - ANSWER-A backflow prevention device How can a damaged heat exchanger be detected on a forced warm air system? - ANSWER-With a smoke trace candle If a high limit is installed to prevent high boiler water temperature, what is the function of the low limit? - ANSWER-To maintain temperature for domestic hot water On a steam system, a plugged siphon loop can have what affect on the heating system? - ANSWER-Insufficient heat in the living space On a triple acting aquastat a minimum of 20 degrees is recommend between the high and low limit, this will prevent? - ANSWER-The boiler going off on high limit before reaching the minimum circulator temperature An advantage of flame retention burner is - ANSWER-Their high static pressure enables boilers and furnaces with tighter more efficient heat exchange passages