Massachusetts Oil burner Practice Exam 2024/2025 with Complete Solutions The cross connection between two supply tanks shall not exceed? - Correct Answer 660 gallons When is an automatic draft control not required? - Correct Answer When the equipment is designed to control the draft.Combustion performance testing can indicate: - Correct 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: - Correct Answer Sufficient draft is available for safe operation of all connected equipment.
Delayed ignition can be caused by: - Correct Answer Weak ignition transformer
You should replace the oil burner nozzle with: - Correct Answer The manufacturers recommended nozzle spray pattern and spray angle.Viscosity problems can be corrected by: - Correct Answer Decreasing the nozzle size and increasing the pump pressure accordingly
The minimum operating pressure of an oil pump is: - Correct Answer 100 PSI
If a stack relay fails you, must? - Correct Answer Replace it with an approved type controller Aquastats are normally found on what type of heating systems? - Correct Answer Hydronic Airstats are found on what type of heating systems? - Correct Answer Forced warm air systems Under sized returns on a warm air system can result in what? - Correct Answer Short cycling of the oil burner 1 / 2
Incorrect nozzle selection in regards to gallon per hour, can result in what problems in a steam system? - Correct Answer Some radiators not heating quickly enough Low boiler water temperature in a hydronic hot water system may be caused by? - Correct Answer Undersized oil burner nozzles Delayed opening oil valves are used to? - Correct 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: - Correct Answer A backflow prevention device How can a damaged heat exchanger be detected on a forced warm air system? - Correct 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?
- Correct Answer To maintain temperature for domestic hot water
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On a steam system, a plugged siphon loop can have what affect on the heating system? - Correct 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? - Correct Answer The boiler going off on high limit before reaching the minimum circulator temperature An advantage of flame retention burner is - Correct 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 - Correct Answer Combustion air Dirt or lint buildup in the bevel of the burner fan blades will - Correct Answer Reduce the amount of combustion air