NEW NORA REVIEW 2025 UPDATED
QUESTIONS WITH ACTUAL
ANSWERS
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
It is best to connect fuel units as a one-pipe system instead of two-pipe because: - CORRECT
ANSWER>>>>One pipe leads to longer filter life and eliminates worries about leaking return
lines
If a nozzle is dirty or plugged it should be: - CORRECT ANSWER>>>>Replaced
What keeps a nozzle from overheating while the burner is running? - CORRECT
ANSWER>>>>The amount of air and oil traveling past it
The flow rate stamped on the nozzle is based on: - CORRECT ANSWER>>>>100 psi
The purpose of an oil burner nozzle is to: - CORRECT ANSWER>>>>Atomize and meter the
oil
Nozzle after-drip can be caused by: - CORRECT ANSWER>>>>Thermal expansion of the oil in
the drawer assembly after shut down
To reduce combustion problems caused by cold oil: - CORRECT ANSWER>>>>Increase the
pump pressure and reduce the nozzle size
Increasing the fuel pump pressure will: - CORRECT ANSWER>>>>Increase the flow rate
Generally, the end of the burner air tube should be: - CORRECT ANSWER>>>>Be flush with
the face of the chamber or recessed approximately ¼"
The draft regulator can: - CORRECT ANSWER>>>>Decrease the draft
A draft regulator is required because: - CORRECT ANSWER>>>>The draft produced by the
chimney needs to be controlled
QUESTIONS WITH ACTUAL
ANSWERS
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
It is best to connect fuel units as a one-pipe system instead of two-pipe because: - CORRECT
ANSWER>>>>One pipe leads to longer filter life and eliminates worries about leaking return
lines
If a nozzle is dirty or plugged it should be: - CORRECT ANSWER>>>>Replaced
What keeps a nozzle from overheating while the burner is running? - CORRECT
ANSWER>>>>The amount of air and oil traveling past it
The flow rate stamped on the nozzle is based on: - CORRECT ANSWER>>>>100 psi
The purpose of an oil burner nozzle is to: - CORRECT ANSWER>>>>Atomize and meter the
oil
Nozzle after-drip can be caused by: - CORRECT ANSWER>>>>Thermal expansion of the oil in
the drawer assembly after shut down
To reduce combustion problems caused by cold oil: - CORRECT ANSWER>>>>Increase the
pump pressure and reduce the nozzle size
Increasing the fuel pump pressure will: - CORRECT ANSWER>>>>Increase the flow rate
Generally, the end of the burner air tube should be: - CORRECT ANSWER>>>>Be flush with
the face of the chamber or recessed approximately ¼"
The draft regulator can: - CORRECT ANSWER>>>>Decrease the draft
A draft regulator is required because: - CORRECT ANSWER>>>>The draft produced by the
chimney needs to be controlled
