Oil Burners State test Questions and Answers(2024 Latest Update) (GRADED +)

how should an oil tank be supported - ANSWER Ridgid non-combustible supports to prevent settling, sliding, or lifting what is the wire gauge used on oil burner circuits - ANSWER 14 gauge minimum how is an oil burner wired - ANSWER oil burners are wired intermittent or interrupted what does intermittent or interrupted mean - ANSWER intermittent - Transformer stays on throughout the burner firing cycle interrupted - Transformer drops out after flame established who approves oil burners in Mass - ANSWER the fire marshal what does the term Marshall mean - ANSWER State Fire Marshal what size vent pipe is required with a 2-inch fill pipe - ANSWER 2 inch minimum what are the elements found in fuel oil - ANSWER 85% carbon 15% hydrogen what is fuel oil - ANSWER a hydrocarbon how must fuel oil be prepared for combustion - ANSWER it must be atomized or vaporized, and mixed with air What is a BTU (British Thermal Unit)? - ANSWER the amount of heat necessary to raise 1 lb of water, 1° Fahrenheit how many BTUs are there in a gallon of number 2 fuel - ANSWER 140000 what determines the GPH of a nozzle - ANSWER the orifice what is a degree day - ANSWER 65 degrees Fahrenheit minus the daily average temperature can materials other than steel be used in fuel oil tanks - ANSWER yes, is approved what does the word approved mean - ANSWER accepted by the Marshall, or by a laboratory, which is by the Marshall when is a combustion efficiency test required by law - ANSWER after installations and alterations what control shuts off the oil burner in the event of excessive heat temperature in the appliance - ANSWER the high limit name three functions of an oil pump - ANSWER pick up, pressurize, and strain oil how is oil flow adjusted in a rotary burner - ANSWER by the constant level valve how is safety timing checked on a stack switch - ANSWER remove the stack switch from its holder or disconnect Terminal 3, fire the control and time it's lockout what is safety lockout timing firing under 3 GPH - ANSWER 45 seconds how should a stack control be mounted according to code - ANSWER not rigidly mounted why should stack switch not be rigidly mounted - ANSWER so it can be easily removed for cleaning and inspection, without disturbing any wiring what safety devices are found on a gravity burner - ANSWER a constant level valve, and a solenoid valve