Download MASSACHUSETTS OIL BURNER PRACTICE EXAM | QUESTIONS & ANSWERS (VERIFIED) | LATEST 2024/25 and more Exams Engineering in PDF only on Docsity!
MASSACHUSETTS OIL BURNER
PRACTICE EXAM | QUESTIONS &
ANSWERS (VERIFIED) | LATEST UPDATE |
GRADED A+
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
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 To change the air ratio for different firing rates with an adjustable head burner you Correct answer: Adjust the position of the drawer assembly in the Air tube All petroleum products are chemical compounds of Correct answer: Hydrogen and carbon
1 gallon of #2 oil contains approximately how many BTU's? Correct answer: 140,000 BTU's Flashpoint of a fuel is an indication of Correct answer: The lowest temperature at which the fuel will flash but not continue to burn The pour point of #2 oil Correct 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 Correct answer: 10,000 gallons Is heating oil gets colder its viscosity (thickness): Correct answer: Increases Sulfuric acid in combustion gases can: Correct 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 Correct answer: Water
If the oil level in the tank is 4 feet below the fuel unit in 10 feet away, the approximate vacuum should be Correct answer: 5 - 6 inches If the operating vacuum reading a significantly above the calculated vacuum, you probably have a Correct answer: Clogged oil filter If the operating vacuum reading is significantly less than the calculated vacuum, you probably have a Correct answer: Suction line leak It is best to connect your unit as a one pipe system instead of a 2 pipe system because Correct answer: One pipe leads to longer filter life and eliminates worries about leaking return lines A fuel de-aerator: Correct answer: Eliminates the need for a return line back to the tank A cause of pulsating oil pump pressure and a pulsating fire is Correct answer: Air leaks in the suction line Increasing the fuel pump pressure will
Correct answer: Increase the flow rate The purpose of an oil burner nozzle is to Correct answer: Automize the oil, provide a pattern of oil spray, and meter the amount of oil burned When replacing nozzle Correct answer: Follow the manufacturer's recommendations To reduce combustion problems caused by cold oil Correct answer: 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 Correct answer: 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: Correct answer: 100 PSI A proper combustion chamber:
