NORA Study Guide Exam Questions
and Answers 100% Pass
The key final adjustment for most oil burners is? - ✔✔Combustion Air
Dirt or lint build-up in the bevel of the burner fan blades will? - ✔✔Reduce the blade
bevel and reduce the amount of air delivered
To change the air ratio for different firing rates with an adjustable head burner you? -
✔✔Move the head forward or backward, against or away from the ring closing or
opening the tertiary slot
One advantage of high static pressure burners is? - ✔✔Allows manufacturers to create
tighter more efficient heat exchangers
One gallon of #2 fuel oil contains approximately? - ✔✔140,000 BTU'S
All petroleum products are chemical compounds of? - ✔✔Carbon & Hydrogen
The flash point of a fuel is an indication of? - ✔✔The maximum temperature at which
fuel can be stored safely and handled without a serious fire hazard. 100 degrees
The ignition point of fuel is? - ✔✔The lowest temperature at which rapid combustion of
a fuel will take place. The point at which all fuel has been heated and vaporized. 500
degrees
The pour point of #2 oil is? - ✔✔The lowest point at which fuel will flow. 17 degrees
As heating oil gets colder it's viscosity? - ✔✔Increases
© EMILY CHARLENE YEAR 2025-2026, ALL RIGHTS RESERVED 1
, Sulfuric acid in combustion gases can? - ✔✔Create Sulfuric Trioxide which can react
with the water vapor in the combustion gases to create a sulfuric acid aerosol which will
scale up the heat exchanger
The home for bacterial growth and sludge in the bottom of the oil tank is? - ✔✔Water
To insure clean, uncontaminated fuel reaches the oil burner? - ✔✔Make sure to use a
clean oil filter at the tank
Water in oil tanks comes from? - ✔✔Condensation, broken tank gauge, loose vent or fill
fittings or missing caps, pumping old oil into new tank
When installing an oil tank be sure? - ✔✔Fill and vent are pitched downwards, install
oil filter
Oil lines buried in concrete should be? - ✔✔Covered copper oil line
Fuel units (oil pumps) perform the following function - ✔✔Draw oil from the tank to
the burner and pressurize the oil to 100 PSI or greater
The best way to clear a clogged oil line is to? - ✔✔Flush out the lines
If the oil level in the tank is 4' below the fuel unit and 10' away the approximate vacuum
should be? - ✔✔5" of vacuum 1" for every 1' rise plus 1" for every 10' run
If the operating vacuum reading is significantly above the calculated vacuum you
probably have a? - ✔✔Plugged fuel filter, kinked oil supply line or a partially closed oil
supply valve
If the operating vacuum is significantly less then the calculated vacuum you probably
have a? - ✔✔Air leak in the suction line
It is best to connect fuel units as a one-pipe system instead of two-pipe because? -
✔✔Two pipe systems filter the oil several times causing the filter to clog faster
© EMILY CHARLENE YEAR 2025-2026, ALL RIGHTS RESERVED 2
and Answers 100% Pass
The key final adjustment for most oil burners is? - ✔✔Combustion Air
Dirt or lint build-up in the bevel of the burner fan blades will? - ✔✔Reduce the blade
bevel and reduce the amount of air delivered
To change the air ratio for different firing rates with an adjustable head burner you? -
✔✔Move the head forward or backward, against or away from the ring closing or
opening the tertiary slot
One advantage of high static pressure burners is? - ✔✔Allows manufacturers to create
tighter more efficient heat exchangers
One gallon of #2 fuel oil contains approximately? - ✔✔140,000 BTU'S
All petroleum products are chemical compounds of? - ✔✔Carbon & Hydrogen
The flash point of a fuel is an indication of? - ✔✔The maximum temperature at which
fuel can be stored safely and handled without a serious fire hazard. 100 degrees
The ignition point of fuel is? - ✔✔The lowest temperature at which rapid combustion of
a fuel will take place. The point at which all fuel has been heated and vaporized. 500
degrees
The pour point of #2 oil is? - ✔✔The lowest point at which fuel will flow. 17 degrees
As heating oil gets colder it's viscosity? - ✔✔Increases
© EMILY CHARLENE YEAR 2025-2026, ALL RIGHTS RESERVED 1
, Sulfuric acid in combustion gases can? - ✔✔Create Sulfuric Trioxide which can react
with the water vapor in the combustion gases to create a sulfuric acid aerosol which will
scale up the heat exchanger
The home for bacterial growth and sludge in the bottom of the oil tank is? - ✔✔Water
To insure clean, uncontaminated fuel reaches the oil burner? - ✔✔Make sure to use a
clean oil filter at the tank
Water in oil tanks comes from? - ✔✔Condensation, broken tank gauge, loose vent or fill
fittings or missing caps, pumping old oil into new tank
When installing an oil tank be sure? - ✔✔Fill and vent are pitched downwards, install
oil filter
Oil lines buried in concrete should be? - ✔✔Covered copper oil line
Fuel units (oil pumps) perform the following function - ✔✔Draw oil from the tank to
the burner and pressurize the oil to 100 PSI or greater
The best way to clear a clogged oil line is to? - ✔✔Flush out the lines
If the oil level in the tank is 4' below the fuel unit and 10' away the approximate vacuum
should be? - ✔✔5" of vacuum 1" for every 1' rise plus 1" for every 10' run
If the operating vacuum reading is significantly above the calculated vacuum you
probably have a? - ✔✔Plugged fuel filter, kinked oil supply line or a partially closed oil
supply valve
If the operating vacuum is significantly less then the calculated vacuum you probably
have a? - ✔✔Air leak in the suction line
It is best to connect fuel units as a one-pipe system instead of two-pipe because? -
✔✔Two pipe systems filter the oil several times causing the filter to clog faster
© EMILY CHARLENE YEAR 2025-2026, ALL RIGHTS RESERVED 2
