NORA Final Review Exam Questions
and Answers 100% Pass
How many BTU's does one gallon of #2 fuel contain? - ✔✔139,000
when the viscosity of the fuel entering the nozzle increases _____________ increases? -
✔✔the flow rate also increases.
Flash point is? - ✔✔The maximum temp a fuel can be safely stored & handled without
serious fire hazard.
Fire point is? - ✔✔Ignition point is the lowest temperature at which fuel vapor will
initiate and sustain combustion.
Pour point is? - ✔✔the lowest temperature at which fuel will flow.
Cloud point is? - ✔✔the temperature at which wax crystals begin to form.
Using additives can? - ✔✔Lower pour point and cloud point.
Sulfur exists in? - ✔✔Varying degrees in all fossil fuels.
Using ULSD all but eliminates? - ✔✔Smoke and soot formation.
Why is heating oil dyed red? - ✔✔to differentiate it from on-road diesel fuel.
What is Bioheat a blend of? - ✔✔A blend of #2 fuel and B100 biodiesel.
What is combustion? - ✔✔the rapid reaction of a combustible material with oxygen,
involving the production of heat and light.
© EMILY CHARLENE YEAR 2025-2026, ALL RIGHTS RESERVED 1
, What 3 things are required for combustion to take place? - ✔✔Oxygen, fuel, heat
What three electrical components does the primary control operate? - ✔✔the burner
motor, ignitor, and oil valve.
An oil burner motor is responsible to create the force needed to turn ______________? -
✔✔The burner fan and fuel unit.
The burner motor drives? - ✔✔The fan and a fuel unit.
The furl units' function is? - ✔✔Moves fuel from the tank, pressurizes it and delivers it
to the nozzle, provide fast and complete cutoff of fuel on burner shutdown.
What is primary air? - ✔✔Air that exists through the center opening.
What is secondary air? - ✔✔Air that exists through the slots that cause the air to spin
enabling the best mix of fuel and air.
What is tertiary air? - ✔✔Air that exists around and outside of the flame retention ring
and blankets the fuel with air to ensure clean combustion.
The difference between fixed and adjustable heads? - ✔✔Fixed heads are attached and
have a pre-set tertiary air opening, an adjustable head is attached to the nozzle
assembly and is moved to change the tertiary air opening.
The key final adjustment for most burners is? - ✔✔Combustion air
Burner fan blades need to be cleaned of debris to ensure? - ✔✔Proper amount of
combustion air is delivered.
Dirt or lint build up on fan blades or air inlet will? - ✔✔Reduce the amount of
combustion air.
© EMILY CHARLENE YEAR 2025-2026, ALL RIGHTS RESERVED 2
and Answers 100% Pass
How many BTU's does one gallon of #2 fuel contain? - ✔✔139,000
when the viscosity of the fuel entering the nozzle increases _____________ increases? -
✔✔the flow rate also increases.
Flash point is? - ✔✔The maximum temp a fuel can be safely stored & handled without
serious fire hazard.
Fire point is? - ✔✔Ignition point is the lowest temperature at which fuel vapor will
initiate and sustain combustion.
Pour point is? - ✔✔the lowest temperature at which fuel will flow.
Cloud point is? - ✔✔the temperature at which wax crystals begin to form.
Using additives can? - ✔✔Lower pour point and cloud point.
Sulfur exists in? - ✔✔Varying degrees in all fossil fuels.
Using ULSD all but eliminates? - ✔✔Smoke and soot formation.
Why is heating oil dyed red? - ✔✔to differentiate it from on-road diesel fuel.
What is Bioheat a blend of? - ✔✔A blend of #2 fuel and B100 biodiesel.
What is combustion? - ✔✔the rapid reaction of a combustible material with oxygen,
involving the production of heat and light.
© EMILY CHARLENE YEAR 2025-2026, ALL RIGHTS RESERVED 1
, What 3 things are required for combustion to take place? - ✔✔Oxygen, fuel, heat
What three electrical components does the primary control operate? - ✔✔the burner
motor, ignitor, and oil valve.
An oil burner motor is responsible to create the force needed to turn ______________? -
✔✔The burner fan and fuel unit.
The burner motor drives? - ✔✔The fan and a fuel unit.
The furl units' function is? - ✔✔Moves fuel from the tank, pressurizes it and delivers it
to the nozzle, provide fast and complete cutoff of fuel on burner shutdown.
What is primary air? - ✔✔Air that exists through the center opening.
What is secondary air? - ✔✔Air that exists through the slots that cause the air to spin
enabling the best mix of fuel and air.
What is tertiary air? - ✔✔Air that exists around and outside of the flame retention ring
and blankets the fuel with air to ensure clean combustion.
The difference between fixed and adjustable heads? - ✔✔Fixed heads are attached and
have a pre-set tertiary air opening, an adjustable head is attached to the nozzle
assembly and is moved to change the tertiary air opening.
The key final adjustment for most burners is? - ✔✔Combustion air
Burner fan blades need to be cleaned of debris to ensure? - ✔✔Proper amount of
combustion air is delivered.
Dirt or lint build up on fan blades or air inlet will? - ✔✔Reduce the amount of
combustion air.
© EMILY CHARLENE YEAR 2025-2026, ALL RIGHTS RESERVED 2
