NORA REVIEW LATEST UPDATE GRADED A+

NORA REVIEW LATEST UPDATE GRADED A+ In a typical oil burner, the motor drives: Both the fuel unit and the fan The key final adjustment for most oil burners is: Combustion air High static air pressure burners: Enable boilers and furnaces to have tighter more efficient heat exchanger passages Dirt or lint build-up on the burnerfan blades will: Reduce the amount of combustion air One gallon of #2 oil contains approximately: 140,000 BTU's All petroleum products are chemical compounds of: Hydrogen and Carbon The pour point of #2 oil is: The lowest temperature at which oil will flow Flash point of a fuel is an indication of: The maximum temperature at which it can be safely stored and handled without serious fire hazard The pour point of #2 oil can be reduced by: Blending it with kerosene As heating oil gets colder its viscosity (thickness): Increases A tank without a vent alarm: Should not be filled Oil lines that contact concrete or dirt should be: Coated or sleeved in plastic pipe with no fittings below the floor What is the most common source of water in oil tanks? Condensation The home for bacterial growth and sludge in the bottom of the oil tank is: Water Pumping the old oil from a tank being replaced into the new tank: Must be avoided because it can lead to premature tank failure Fuel units perform the following functions: Move oil from the tank to the burner and deliver it at a constant regulated pressure to the nozzle The best way to clear a clogged oil line is to: Use a hand pump to suck the blockage out If the oil level in the tank is 4 feet below and 10 feet away from the fuel unit and the oil filter is clean the vacuum reading should be approximately: 4 to 7 inches If the operating vacuum is significantly less than the calculated vacuum you probably have: A suction line leak If the operating vacuum reading is significantly above the calculated vacuum you probably have: A clogged oil filter It is best to connect fuel units as a one-pipe system instead of two-pipe because: One pipe leads to longer filter life and eliminates worries about leaking return lines If a nozzle is dirty or plugged it should be: Replaced