NORA TEST Q&A
the pour point of #2 oil can be reduced by: - ANSWER -Blending it with kerosene
as heating oil get colder it viscosity - ANSWER -increases
a tank without a vent alarm - ANSWER -should not be filled
oil lines that contact concrete or dirt should be - ANSWER -coated or sleeved in plastic
pipe with no fittings below the floor
what is the most common source of water in oil tanks - ANSWER -condensation
the home for bacterial growth and sludge in the bottom of the oil tank is - ANSWER -water
pumping the old oil from the tank being replaced into the new tank - ANSWER -must be
avoided because it can lead to premature tank failure
What does a Fuel unit do - ANSWER -move oil from the tank to the burner and deliver it at
constant regulated pressure to the nozzle
the best way to clear a clogged oil line is to - ANSWER -Use a hand pump to pull the
blockage out
If the oil level in the tank is 4 feet below the fuel unit and 10 feet away the approximate
vacuum should be - ANSWER -4 to 7 inches
If the operating vacuum reading is significantly less than the calculated vacuum, you
probably have a - ANSWER -a suction line leak
If the operating vacuum reading is significantly above the calculated vacuum you probably
have a? - ANSWER -a clogged oil filter
It is best to connect fuel units as a one-pipe system instead of two-pipe because? -
ANSWER -one pipe leads to longer filter life and eliminates worries about leaking return
lines
in a typical oil burner, the motor drives: - ANSWER -both the fuel unit and the fan
the key final adjustment for most oil burners is - ANSWER -combustion air
high static air pressure burners - ANSWER -enable boilers and furnaces to have tighter
more efficient heat exchange
, dirt or lint build- up on the burner fan blade will - ANSWER -reduce the amount of
combustion air
one gallon of #2 oil contains approximately - ANSWER -140,000 BTU's
All petroleum products are chemical compounds of - ANSWER -hydrogen and carbon
the pour point of #2 oil/fuel is: - ANSWER -the lowest temp at which oil will flow (17-20 F )
flash point of fuels is an indication of: - ANSWER -the max temp at which it can be safely
stored and handled without serious fire hazard
if a nozzle is dirty or plugged it should be - ANSWER -replaced
what keeps a nozzle from overheating while the burner is running? - ANSWER -the
amount of air and oil traveling past it
the flow rate stamped on the nozzle is based on - ANSWER -100 psi
the purpose of an oil burner nozzle is to - ANSWER -atomize and meter the oil
Nozzle after drip can be caused by - ANSWER -Thermal expansion of the oil the drawer
assembly after shut down
To reduce combustion problem caused by cold oil - ANSWER -increase the pump
pressure reduce the nozzle size
Increasing the fuel pump pressure will - ANSWER -Increase the flow-rate.
generally, the end of the burner air tube should be - ANSWER -be flush with the face of
the chamber or recessed approximately 1/4"
the draft regulator can - ANSWER -decrease the draft
a draft regulator is required because - ANSWER -the draft produced by the chimney
needs to be controlled
the most important draft measurement is: - ANSWER -over the fire
to get accurate results a combustion test should be preformed - ANSWER -when the unit
reaches steady state operation
excessive draft drop though the heat exchanger indicates - ANSWER -heavy soot and
scale deposits in the heat exchanger
at the steady state draft should usually be -.01 to -.02 - ANSWER -over the fire
the pour point of #2 oil can be reduced by: - ANSWER -Blending it with kerosene
as heating oil get colder it viscosity - ANSWER -increases
a tank without a vent alarm - ANSWER -should not be filled
oil lines that contact concrete or dirt should be - ANSWER -coated or sleeved in plastic
pipe with no fittings below the floor
what is the most common source of water in oil tanks - ANSWER -condensation
the home for bacterial growth and sludge in the bottom of the oil tank is - ANSWER -water
pumping the old oil from the tank being replaced into the new tank - ANSWER -must be
avoided because it can lead to premature tank failure
What does a Fuel unit do - ANSWER -move oil from the tank to the burner and deliver it at
constant regulated pressure to the nozzle
the best way to clear a clogged oil line is to - ANSWER -Use a hand pump to pull the
blockage out
If the oil level in the tank is 4 feet below the fuel unit and 10 feet away the approximate
vacuum should be - ANSWER -4 to 7 inches
If the operating vacuum reading is significantly less than the calculated vacuum, you
probably have a - ANSWER -a suction line leak
If the operating vacuum reading is significantly above the calculated vacuum you probably
have a? - ANSWER -a clogged oil filter
It is best to connect fuel units as a one-pipe system instead of two-pipe because? -
ANSWER -one pipe leads to longer filter life and eliminates worries about leaking return
lines
in a typical oil burner, the motor drives: - ANSWER -both the fuel unit and the fan
the key final adjustment for most oil burners is - ANSWER -combustion air
high static air pressure burners - ANSWER -enable boilers and furnaces to have tighter
more efficient heat exchange
, dirt or lint build- up on the burner fan blade will - ANSWER -reduce the amount of
combustion air
one gallon of #2 oil contains approximately - ANSWER -140,000 BTU's
All petroleum products are chemical compounds of - ANSWER -hydrogen and carbon
the pour point of #2 oil/fuel is: - ANSWER -the lowest temp at which oil will flow (17-20 F )
flash point of fuels is an indication of: - ANSWER -the max temp at which it can be safely
stored and handled without serious fire hazard
if a nozzle is dirty or plugged it should be - ANSWER -replaced
what keeps a nozzle from overheating while the burner is running? - ANSWER -the
amount of air and oil traveling past it
the flow rate stamped on the nozzle is based on - ANSWER -100 psi
the purpose of an oil burner nozzle is to - ANSWER -atomize and meter the oil
Nozzle after drip can be caused by - ANSWER -Thermal expansion of the oil the drawer
assembly after shut down
To reduce combustion problem caused by cold oil - ANSWER -increase the pump
pressure reduce the nozzle size
Increasing the fuel pump pressure will - ANSWER -Increase the flow-rate.
generally, the end of the burner air tube should be - ANSWER -be flush with the face of
the chamber or recessed approximately 1/4"
the draft regulator can - ANSWER -decrease the draft
a draft regulator is required because - ANSWER -the draft produced by the chimney
needs to be controlled
the most important draft measurement is: - ANSWER -over the fire
to get accurate results a combustion test should be preformed - ANSWER -when the unit
reaches steady state operation
excessive draft drop though the heat exchanger indicates - ANSWER -heavy soot and
scale deposits in the heat exchanger
at the steady state draft should usually be -.01 to -.02 - ANSWER -over the fire
