NORA CERTIFICATION EXAM QUESTIONS AND ANSWERS
The final adjustment for most oil burners is? - CORRECT ANSWERS✅✅Combustion air
Dirt or lint build-up in the bevel of the fan blades will: - CORRECT ANSWERS✅✅Reduce the amount of
combustion air.
To change the air ratio for different firing rates with an adjustable head burner you: - CORRECT
ANSWERS✅✅Adjust the position of the draw assembly in the air tube.
One advantage of a high pressure burner is: - CORRECT ANSWERS✅✅They enable boiler manufacturers
to design tighter more efficient heat exchangers.
One gallon of #2 oil contains approximately: - CORRECT ANSWERS✅✅140,000 British Thermal Unit's
(BTU's)
All petroleum products are chemical compounds of what two atom's? - CORRECT ANSWERS✅✅Carbon
and Hydrogen
Flash point of a fuel is an indication of: - CORRECT ANSWERS✅✅The lowest temperature at which the
fuel will flash but not continue to burn.
The ignition point is: - CORRECT ANSWERS✅✅The lowest temperature at which rapid combustion of
the fuel takes place in air.
The pour point of #2 oil: - CORRECT ANSWERS✅✅1. Can be lowered by blending with kerosene,
2. Can be lowered with fuel additives,
3. Is the lowest temperature at which oil will flow.
As heating oil gets colder its viscosity (thickness): - CORRECT ANSWERS✅✅Increases (Thicker
consistency)
, Sulfuric acid in combustion gasses can: - CORRECT ANSWERS✅✅1. Damage the flue liner,
2. Eat holes in the flue pipe,
3. Create scale buildup in the heat exchanger.
The home for bacteria growth and sludge in the bottom of the oil tank is: - CORRECT
ANSWERS✅✅Water.
To insure clean uncontaminated fuel reaches the oil burner: - CORRECT ANSWERS✅✅Install a quality
filter.
Water in oil tanks come from: - CORRECT ANSWERS✅✅1. Condensation,
2. loose or missing fill vent cap,
3. failing to drain water from tank before install.
When installing an oil tank be sure: - CORRECT ANSWERS✅✅1. Fill vents are pitched downwards
forward the tank,
2. To install a vent alarm and tank gauge,
3. To install an oil filter.
Oil lines buried in concrete should be: - CORRECT ANSWERS✅✅Sleeved in plastic or PVC pipe with no
fittings below the floor.
Fuel Units (oil pumps) perform the following functions: - CORRECT ANSWERS✅✅Lift oil from the tank to
the burner, Prevent contaminants that pass the external oil filter from clogging the nozzle, Deliver oil at
a constant regulated pressure to the nozzle.
The best way to clear a clogged oil line is to: - CORRECT ANSWERS✅✅Use a hand pump to pull the
blockage out.
The final adjustment for most oil burners is? - CORRECT ANSWERS✅✅Combustion air
Dirt or lint build-up in the bevel of the fan blades will: - CORRECT ANSWERS✅✅Reduce the amount of
combustion air.
To change the air ratio for different firing rates with an adjustable head burner you: - CORRECT
ANSWERS✅✅Adjust the position of the draw assembly in the air tube.
One advantage of a high pressure burner is: - CORRECT ANSWERS✅✅They enable boiler manufacturers
to design tighter more efficient heat exchangers.
One gallon of #2 oil contains approximately: - CORRECT ANSWERS✅✅140,000 British Thermal Unit's
(BTU's)
All petroleum products are chemical compounds of what two atom's? - CORRECT ANSWERS✅✅Carbon
and Hydrogen
Flash point of a fuel is an indication of: - CORRECT ANSWERS✅✅The lowest temperature at which the
fuel will flash but not continue to burn.
The ignition point is: - CORRECT ANSWERS✅✅The lowest temperature at which rapid combustion of
the fuel takes place in air.
The pour point of #2 oil: - CORRECT ANSWERS✅✅1. Can be lowered by blending with kerosene,
2. Can be lowered with fuel additives,
3. Is the lowest temperature at which oil will flow.
As heating oil gets colder its viscosity (thickness): - CORRECT ANSWERS✅✅Increases (Thicker
consistency)
, Sulfuric acid in combustion gasses can: - CORRECT ANSWERS✅✅1. Damage the flue liner,
2. Eat holes in the flue pipe,
3. Create scale buildup in the heat exchanger.
The home for bacteria growth and sludge in the bottom of the oil tank is: - CORRECT
ANSWERS✅✅Water.
To insure clean uncontaminated fuel reaches the oil burner: - CORRECT ANSWERS✅✅Install a quality
filter.
Water in oil tanks come from: - CORRECT ANSWERS✅✅1. Condensation,
2. loose or missing fill vent cap,
3. failing to drain water from tank before install.
When installing an oil tank be sure: - CORRECT ANSWERS✅✅1. Fill vents are pitched downwards
forward the tank,
2. To install a vent alarm and tank gauge,
3. To install an oil filter.
Oil lines buried in concrete should be: - CORRECT ANSWERS✅✅Sleeved in plastic or PVC pipe with no
fittings below the floor.
Fuel Units (oil pumps) perform the following functions: - CORRECT ANSWERS✅✅Lift oil from the tank to
the burner, Prevent contaminants that pass the external oil filter from clogging the nozzle, Deliver oil at
a constant regulated pressure to the nozzle.
The best way to clear a clogged oil line is to: - CORRECT ANSWERS✅✅Use a hand pump to pull the
blockage out.
