NORA REVIEW EXAM QUESTIONS
AND ANSWERS 100% PASS
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
© EMILY CHARLENE YEAR 2025-2026, ALL RIGHTS RESERVED 1
, 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
What keeps a nozzle from overheating while the burner is running? - ✔✔The amount of
air and oil traveling past it
The flow rate stamped on the nozzle is based on: - ✔✔100 psi
The purpose of an oil burner nozzle is to: - ✔✔Atomize and meter the oil
© EMILY CHARLENE YEAR 2025-2026, ALL RIGHTS RESERVED 2
AND ANSWERS 100% PASS
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
© EMILY CHARLENE YEAR 2025-2026, ALL RIGHTS RESERVED 1
, 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
What keeps a nozzle from overheating while the burner is running? - ✔✔The amount of
air and oil traveling past it
The flow rate stamped on the nozzle is based on: - ✔✔100 psi
The purpose of an oil burner nozzle is to: - ✔✔Atomize and meter the oil
© EMILY CHARLENE YEAR 2025-2026, ALL RIGHTS RESERVED 2
