Massachusetts Oil burner Practice Exam 2023

The cross connection between two supply tanks shall not exceed? - Answer- 660 gallons When is an automatic draft control not required? - Answer- When the equipment is designed to control the draft. Combustion performance testing can indicate: - Answer- Improper air oil mixture, too much combustion air, and low pump pressure. If a second oil-burning appliance is installed in a single chimney, you must insure: - Answer- Sufficient draft is available for safe operation of all connected equipment. Delayed ignition can be caused by: - Answer- Weak ignition transformer You should replace the oil burner nozzle with: - Answer- The manufacturers recommended nozzle spray pattern and spray angle. 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 The key final adjustment for most oil burners is - Answer- Combustion air Dirt or lint buildup in the bevel of the burner fan blades will - Answer- Reduce the amount of combustion air To change the air ratio for different firing rates with an adjustable head burner you - Answer- Adjust the position of the drawer assembly in the Air tube All petroleum products are chemical compounds of - Answer- Hydrogen and carbon 1 gallon of #2 oil contains approximately how many BTU's? - Answer- 140,000 BTU's Flashpoint of a fuel is an indication of - Answer- The lowest temperature at which the fuel will flash but not continue to burn The pour point of #2 oil - Answer- Can be lowered by blending with kerosene, can be lowered with fuel additives, and is the lowest temperature at which it will flow Maximum fuel allowed without a license - Answer- 10,000 gallons Is heating oil gets colder its viscosity (thickness): - Answer- Increases Sulfuric acid in combustion gases can: - Answer- 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 - Answer- Water To ensure clean, uncontaminated fuel reaches the oil burner you must - Answer- 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 - Answer- 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: - Answer- 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 - Answer- Sleeved in plastic or PVC pipe with no fittings below the floor Fuel units (oil pumps) preform the following functions - Answer- 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 - Answer- 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 - Answer- 5 - 6 inches If the operating vacuum reading a significantly above the calculated vacuum, you probably have a - Answer- Clogged oil filter If the operating vacuum reading is significantly less than the calculated vacuum, you probably have a - Answer- Suction line leak It is best to connect your unit as a one pipe system instead of a 2 pipe system because - Answer- One pipe leads to longer filter life and eliminates worries about leaking return lines A fuel de-aerator: - Answer- Eliminates the need for a return line back to the tank A cause of pulsating oil pump pressure and a pulsating fire is - Answer- Air leaks in the suction line Increasing the fuel pump pressure will - Answer- Increase the flow rate The purpose of an oil burner nozzle is to - Answer- Automize the oil, provide a pattern of oil spray, and meter the amount of oil burned When replacing nozzle - Answer- Follow the manufacturer's recommendations To reduce combustion