NORA BRONZE EXAM QUESTIONS
WITH COMPLETE ANSWERS
What is combustion? - ANSWER -rapid reaction of combustible material with oxygen
involving the production of heat and light
3 things needed for combustion? - ANSWER -oxygen, fuel, heat
what 3 electrical components does the primary control operate? - ANSWER -burner
motor, igniter and oil valve
what does the burner motor drive? - ANSWER -fan and fuel unit
what's the fuel units' function? - ANSWER -moves fuel from the tank, pressurizes it and
delivers it to the nozzle, provides fast and complete cutoff of fuel on burner shutdown
primary air - ANSWER -air that exits through the center opening
secondary air - ANSWER -air that exits through the slots, causes the air to spin
enabling the best mix of fuel and air
tertiary air - ANSWER -Air that exits around the outside of the flame retention ring and
blankets the fuel with air to ensure clean combustion.
what's the difference between fixed and adjustable heads? - ANSWER -fixed heads are
attached and have a preset tertiary air opening. an adjustable head is attached to the
nozzle assembly and is moved to change the tertiary air opening
how many btus does one gallon of #2 fuel contain? - ANSWER -139,000 BTU's
pour point - ANSWER -lowest temp fuel will flow
cloud point - ANSWER -The temperature at which wax crystals first start to form
fire point - ANSWER -The lowest temperature fuel will ignite at
using additives can? - ANSWER -lower pour point and cloud point
flash point - ANSWER -lowest temp a fuel can be safely stored/handled
sulfur exists in? - ANSWER -varying degrees in all fossil fuels
why is heating oil red? - ANSWER -to differentiate fuels (tax reasons)
, what is bioheat a blend of? - ANSWER -#2 fuel and B100 biodiesel
The key final adjustment for most burners is? - ANSWER -Combustion air
dirt or lint build up on fan blades or air inlet will? - ANSWER -reduce the amount of
combustion air
burner fan blades need to be clean of debris to ensure what? - ANSWER -right amount
of combustion air
High static pressure burners have been developed to? - ANSWER -push products of
combustion air through heat exchanger of high efficiency appliances
can cast iron fittings be used on an oil tank piping? - ANSWER -NO
A tank without a functioning vent alarm should? - ANSWER -Not be filled until the vent
alarm is repaired or replaced.
Tanks should be kept free of water because? - ANSWER -can lead to corrosion and
bacteria growth
how can condensation be reduced in outdoor tanks? - ANSWER -additives, putting it in
an enclosure, or by painting it a lighter color
for residential use, what size oil line is recommended? - ANSWER -1/2" O.D or 3/8" I.D
Fuel lines that contact concrete or dirt must be? - ANSWER -sleeved or coated
In general; the right size tank is one that holds? - ANSWER -About one-third (1/3) of the
customers annual fuel consumption.
T or F. Nora recommends pumping "clean" oil from an old tank into a new tank is ok. -
ANSWER -False, NEVER OK
pulsating fuel pressure can be caused by? - ANSWER -partial clog, air, slipping
coupling, or high vacuum
(for vacuum) if the gauge reading is significantly above the calculated reading it could
be? - ANSWER -plugged filter/line, kink in line.
NORA recommends that fuel lines that have blockages be cleared with what? -
ANSWER -hand pump to pull it out
If the gauge reading is significantly below the calculated reading it could be? - ANSWER
-Air leak in suction line, air leak on strainer gasket.
WITH COMPLETE ANSWERS
What is combustion? - ANSWER -rapid reaction of combustible material with oxygen
involving the production of heat and light
3 things needed for combustion? - ANSWER -oxygen, fuel, heat
what 3 electrical components does the primary control operate? - ANSWER -burner
motor, igniter and oil valve
what does the burner motor drive? - ANSWER -fan and fuel unit
what's the fuel units' function? - ANSWER -moves fuel from the tank, pressurizes it and
delivers it to the nozzle, provides fast and complete cutoff of fuel on burner shutdown
primary air - ANSWER -air that exits through the center opening
secondary air - ANSWER -air that exits through the slots, causes the air to spin
enabling the best mix of fuel and air
tertiary air - ANSWER -Air that exits around the outside of the flame retention ring and
blankets the fuel with air to ensure clean combustion.
what's the difference between fixed and adjustable heads? - ANSWER -fixed heads are
attached and have a preset tertiary air opening. an adjustable head is attached to the
nozzle assembly and is moved to change the tertiary air opening
how many btus does one gallon of #2 fuel contain? - ANSWER -139,000 BTU's
pour point - ANSWER -lowest temp fuel will flow
cloud point - ANSWER -The temperature at which wax crystals first start to form
fire point - ANSWER -The lowest temperature fuel will ignite at
using additives can? - ANSWER -lower pour point and cloud point
flash point - ANSWER -lowest temp a fuel can be safely stored/handled
sulfur exists in? - ANSWER -varying degrees in all fossil fuels
why is heating oil red? - ANSWER -to differentiate fuels (tax reasons)
, what is bioheat a blend of? - ANSWER -#2 fuel and B100 biodiesel
The key final adjustment for most burners is? - ANSWER -Combustion air
dirt or lint build up on fan blades or air inlet will? - ANSWER -reduce the amount of
combustion air
burner fan blades need to be clean of debris to ensure what? - ANSWER -right amount
of combustion air
High static pressure burners have been developed to? - ANSWER -push products of
combustion air through heat exchanger of high efficiency appliances
can cast iron fittings be used on an oil tank piping? - ANSWER -NO
A tank without a functioning vent alarm should? - ANSWER -Not be filled until the vent
alarm is repaired or replaced.
Tanks should be kept free of water because? - ANSWER -can lead to corrosion and
bacteria growth
how can condensation be reduced in outdoor tanks? - ANSWER -additives, putting it in
an enclosure, or by painting it a lighter color
for residential use, what size oil line is recommended? - ANSWER -1/2" O.D or 3/8" I.D
Fuel lines that contact concrete or dirt must be? - ANSWER -sleeved or coated
In general; the right size tank is one that holds? - ANSWER -About one-third (1/3) of the
customers annual fuel consumption.
T or F. Nora recommends pumping "clean" oil from an old tank into a new tank is ok. -
ANSWER -False, NEVER OK
pulsating fuel pressure can be caused by? - ANSWER -partial clog, air, slipping
coupling, or high vacuum
(for vacuum) if the gauge reading is significantly above the calculated reading it could
be? - ANSWER -plugged filter/line, kink in line.
NORA recommends that fuel lines that have blockages be cleared with what? -
ANSWER -hand pump to pull it out
If the gauge reading is significantly below the calculated reading it could be? - ANSWER
-Air leak in suction line, air leak on strainer gasket.
