NORA TEST QUESTIONS & VALID
CORRECT ANSWERS PASSED 100%
The key final adjustment for most oil burners is - CORRECT ANSWER combustion air
The high static air pressure created by todays oil burner - CORRECT ANSWER Enable
boiler and furnaces to have tighter more efficient heat
Dirt or lint build-up in the bevel of the burner fan blades will? - CORRECT ANSWER
Reduce the amount of combustion air
How do high pressure atomizing oil burners light oil on fire? - CORRECT ANSWER
They pressurize the oil to turn it from a liquid to droplets, mix them with air, then heat
the droplets until they vaporize then ignite
To change the air ratio for different firing rates with an adjustable head burner you? -
CORRECT ANSWER Adjust the position of the drawer assembly in the Air tube
When burned one gallon of #2 oil releases approximately? - CORRECT ANSWER
140,000 BTU's
The pour point of #2 oil is? - CORRECT ANSWER The lowest temperature at which oil
will flow
Sulfuric acid in combustion gasses can? - CORRECT ANSWER Create scale buildup
in the heat exchanger
Flash point of a fuel is an indication of? - CORRECT ANSWER The lowest temperature
at which it will flash but not continue to burn
As heating oil gets colder its viscosity (thickness)? - CORRECT ANSWER increases
A tank without a vent alarm - CORRECT ANSWER Should not be filled
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 Is ok as long as you do not pump the last 50 gallons from the tank bottom
, Fuel units (oil pumps) perform the following function? - 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 foot below and 10 feet away from the fuel unit and the filter
is new the approximate vacuum should be? - CORRECT ANSWER 5 to 6 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
A cause of pulsating oil pump pressure and pulsating fire is? - CORRECT ANSWER Air
leaks in the suction line
A fuel de-aerator? - CORRECT ANSWER Eliminates the need for a return line back to
the oil tank
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 pressure pump will? - CORRECT ANSWER Increase the flow rate
A proper combustion chamber - CORRECT ANSWER Is large enough so the fire
doesn't impinge on any surface
How are draft and combustion air related? - CORRECT ANSWER As negative draft
over-the- fire increases the combustion air drawn into the burner increases
CORRECT ANSWERS PASSED 100%
The key final adjustment for most oil burners is - CORRECT ANSWER combustion air
The high static air pressure created by todays oil burner - CORRECT ANSWER Enable
boiler and furnaces to have tighter more efficient heat
Dirt or lint build-up in the bevel of the burner fan blades will? - CORRECT ANSWER
Reduce the amount of combustion air
How do high pressure atomizing oil burners light oil on fire? - CORRECT ANSWER
They pressurize the oil to turn it from a liquid to droplets, mix them with air, then heat
the droplets until they vaporize then ignite
To change the air ratio for different firing rates with an adjustable head burner you? -
CORRECT ANSWER Adjust the position of the drawer assembly in the Air tube
When burned one gallon of #2 oil releases approximately? - CORRECT ANSWER
140,000 BTU's
The pour point of #2 oil is? - CORRECT ANSWER The lowest temperature at which oil
will flow
Sulfuric acid in combustion gasses can? - CORRECT ANSWER Create scale buildup
in the heat exchanger
Flash point of a fuel is an indication of? - CORRECT ANSWER The lowest temperature
at which it will flash but not continue to burn
As heating oil gets colder its viscosity (thickness)? - CORRECT ANSWER increases
A tank without a vent alarm - CORRECT ANSWER Should not be filled
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 Is ok as long as you do not pump the last 50 gallons from the tank bottom
, Fuel units (oil pumps) perform the following function? - 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 foot below and 10 feet away from the fuel unit and the filter
is new the approximate vacuum should be? - CORRECT ANSWER 5 to 6 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
A cause of pulsating oil pump pressure and pulsating fire is? - CORRECT ANSWER Air
leaks in the suction line
A fuel de-aerator? - CORRECT ANSWER Eliminates the need for a return line back to
the oil tank
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 pressure pump will? - CORRECT ANSWER Increase the flow rate
A proper combustion chamber - CORRECT ANSWER Is large enough so the fire
doesn't impinge on any surface
How are draft and combustion air related? - CORRECT ANSWER As negative draft
over-the- fire increases the combustion air drawn into the burner increases
