Nora test questions with correct
answers rated 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 exchange
dirt or lint build- up on the burner fan blade 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/fuel is: - correct answer ✔✔ the lowest temp at which oil will flow (17-
20 F )
flash point of fuels is an indication of: - correct answer ✔✔ the max temp 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 get colder it viscosity - 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 the tank being replaced into the new tank - correct answer ✔✔ must
be avoided because it can lead to premature tank failure
What does a Fuel unit do - correct 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 - correct 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 - correct answer ✔✔ 4 to 7 inches
If the operating vacuum reading is significantly less than the calculated vacuum, you probably
have a - correct answer ✔✔ a suction line leak
If the operating vacuum reading is significantly above the calculated vacuum you probably have
a? - correct answer ✔✔ a clogged oil filter
answers rated 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 exchange
dirt or lint build- up on the burner fan blade 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/fuel is: - correct answer ✔✔ the lowest temp at which oil will flow (17-
20 F )
flash point of fuels is an indication of: - correct answer ✔✔ the max temp 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 get colder it viscosity - 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 the tank being replaced into the new tank - correct answer ✔✔ must
be avoided because it can lead to premature tank failure
What does a Fuel unit do - correct 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 - correct 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 - correct answer ✔✔ 4 to 7 inches
If the operating vacuum reading is significantly less than the calculated vacuum, you probably
have a - correct answer ✔✔ a suction line leak
If the operating vacuum reading is significantly above the calculated vacuum you probably have
a? - correct answer ✔✔ a clogged oil filter
