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NORA REVIEW EXAM |QUESTIONS & ANSWERS (VERIFIED)|LATEST UPDATE| GRADED A+
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NORA REVIEW EXAM |QUESTIONS & ANSWERS (VERIFIED)|LATEST UPDATE| GRADED A+
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HOSMERITNORA REVIEW EXAM | QUESTIONS & ANSWERS
(VERIFIED) | LATEST UPDATE | GRADED A+
In a typical oil burner, the motor drives:
Correct answer: Both the fuel unit and the fan
The key final adjustment for most oil burners is:
Correct answer: Combustion air
High static air pressure burners:
Correct answer: Enable boilers and furnaces to have tighter more efficient heat exchanger
passages
Dirt or lint build-up on the burnerfan blades will:
Correct answer: Reduce the amount of combustion air
One gallon of #2 oil contains approximately:
Correct answer: 140,000 BTU's
All petroleum products are chemical compounds of:
Correct answer: Hydrogen and Carbon
,The pour point of #2 oil is:
Correct answer: The lowest temperature at which oil will flow
Flash point of a fuel is an indication of:
Correct answer: 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:
Correct answer: Blending it with kerosene
As heating oil gets colder its viscosity (thickness):
Correct answer: Increases
A tank without a vent alarm:
Correct answer: Should not be filled
Oil lines that contact concrete or dirt should be:
Correct answer: Coated or sleeved in plastic pipe with no fittings below the floor
What is the most common source of water in oil tanks?
Correct answer: Condensation
The home for bacterial growth and sludge in the bottom of the oil tank is:
, Correct answer: Water
Pumping the old oil from a tank being replaced into the new tank:
Correct answer: Must be avoided because it can lead to premature tank failure
Fuel units perform the following functions:
Correct answer: 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:
Correct answer: 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:
Correct answer: 4 to 7 inches
If the operating vacuum is significantly less than the calculated vacuum you probably have:
Correct answer: A suction line leak
If the operating vacuum reading is significantly above the calculated vacuum you probably
have:
Correct answer: A clogged oil filter
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