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Massachusetts Oil Burner 2025 Practice
Questions with Correct and Verified Answers
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Delayed opening oil valves are used to? Allow oil pump to come up to speed If a steam boiler is to be installed with an automatic feeder it must also have: A backflow prevention device How can a damaged heat exchanger be detected on a forced warm air system? 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? To maintain temperature for domestic hot water On a steam system, a plugged siphon loop can have what affect on the heating system?
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? The boiler going off on high limit before reaching the minimum circulator temperature An advantage of flame retention burner is Their high static pressure enables boilers and furnaces with tighter more efficient heat exchange passages The key final adjustment for most oil burners is Combustion air Dirt or lint buildup in the bevel of the burner fan blades will Reduce the amount of combustion air To change the air ratio for different firing rates with an adjustable head burner you Adjust the position of the drawer assembly in the Air tube
Increases Sulfuric acid in combustion gases can: Damon's the flue lines, it holds in the flue pipe, and create a scale buildup in the heat exchanger The home for bacterial growth and sludge in the bottom of the oil tank is Water To ensure clean, uncontaminated fuel reaches the oil burner you must Install tanks properly, regularly inspect and fix minor defects before they lead to major problems, and install a quality oil filter Water in oil tanks come from Condensation, loose or missing fill and vent caps, and failing to drain water from a tank before installation When installing an oil tank be sure:
The fill and vent lines are pitched towards the tank, to install a vent alarm and a tank gauge, and to install an oil filter Oil lines buried in concrete should be Sleeved in plastic or PVC pipe with no fittings below the floor Fuel units (oil pumps) preform the following functions Move oil from the tank to the burner and deliver oil at a constant regulated pressure to the nozzle The best way to clear a clogged oil line is to Use a hand pump to pull the blockage out If the oil level in the tank is 4 feet below the fuel unit in 10 feet away, the approximate vacuum should be 5 - 6 inches If the operating vacuum reading a significantly above the calculated vacuum, you probably have a Clogged oil filter
The purpose of an oil burner nozzle is to Automize the oil, provide a pattern of oil spray, and meter the amount of oil burned When replacing nozzle Follow the manufacturer's recommendations To reduce combustion problems caused by cold oil Increase the pump pressure, install a nozzle line pre-heater, and use additives or kerosene to lower viscosity Nozzle after trip can be caused by a defective pressure regulating valve, air in the nozzle line, and oil expansion in the nozzle after shut down The flow rate stamped on the nozzle is based on: 100 PSI A proper combustion chamber:
Is large enough so the fire doesn't touch (impinge on) any surface, reflects heat back into the fire, and is made of material (like ceramic) that heats up quickly and cools off quickly Too much draft over the fire can occur when There are leaks between the sections of the boiler that let basement air into the heat exchanger
