NORA Study Guide
The flash point of a fuel is an indication of? - Correct Answer-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? - Correct Answer-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? - Correct Answer-The lowest point at which fuel will flow. 17
degrees
As heating oil gets colder it's viscosity? - Correct Answer-Increases
Sulfuric acid in combustion gases can? - Correct Answer-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 key final adjustment for most oil burners is? - Correct Answer-Combustion Air
Dirt or lint build-up in the bevel of the burner fan blades will? - Correct Answer-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? -
Correct Answer-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? - Correct Answer-Allows
manufacturers to create tighter more efficient heat exchangers
One gallon of #2 fuel oil contains approximately? - Correct Answer-140,000 BTU'S
All petroleum products are chemical compounds of? - Correct Answer-Carbon &
Hydrogen
The home for bacterial growth and sludge in the bottom of the oil tank is? - Correct
Answer-Water
To insure clean, uncontaminated fuel reaches the oil burner? - Correct Answer-Make
sure to use a clean oil filter at the tank
, Water in oil tanks comes from? - Correct Answer-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? - Correct Answer-Fill and vent are pitched
downwards, install oil filter
Oil lines buried in concrete should be? - Correct Answer-Covered copper oil line
Fuel units (oil pumps) perform the following function - Correct Answer-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? - Correct Answer-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? - Correct Answer-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? - Correct Answer-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? - Correct Answer-Air leak in the suction line
It is best to connect fuel units as a one-pipe system instead of two-pipe because? -
Correct Answer-Two pipe systems filter the oil several times causing the filter to clog
faster
A fuel de-aerator? - Correct Answer-Reduces air in oil by eliminating the need for a 2
pipe system
A cause of pulsating oil pump pressure and a pulsating fire is? - Correct Answer-
Partially clogged filter/strainer or an air leak
Increasing the fuel pump pressure will? - Correct Answer-Increase flow rate and
increase atomization
The purpose of a oil burner nozzle is to? - Correct Answer-Atomize, meter and set a
spray pattern for the fuel
When replacing a nozzle? - Correct Answer-Always follow manufacturers
recommendations. Always handle carefully and touch as little as possible
To reduce combustion problems caused by cold oil? - Correct Answer-Increase pump
pressure, nozzle line preheater or blend kerosine or additives with fuel
The flash point of a fuel is an indication of? - Correct Answer-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? - Correct Answer-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? - Correct Answer-The lowest point at which fuel will flow. 17
degrees
As heating oil gets colder it's viscosity? - Correct Answer-Increases
Sulfuric acid in combustion gases can? - Correct Answer-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 key final adjustment for most oil burners is? - Correct Answer-Combustion Air
Dirt or lint build-up in the bevel of the burner fan blades will? - Correct Answer-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? -
Correct Answer-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? - Correct Answer-Allows
manufacturers to create tighter more efficient heat exchangers
One gallon of #2 fuel oil contains approximately? - Correct Answer-140,000 BTU'S
All petroleum products are chemical compounds of? - Correct Answer-Carbon &
Hydrogen
The home for bacterial growth and sludge in the bottom of the oil tank is? - Correct
Answer-Water
To insure clean, uncontaminated fuel reaches the oil burner? - Correct Answer-Make
sure to use a clean oil filter at the tank
, Water in oil tanks comes from? - Correct Answer-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? - Correct Answer-Fill and vent are pitched
downwards, install oil filter
Oil lines buried in concrete should be? - Correct Answer-Covered copper oil line
Fuel units (oil pumps) perform the following function - Correct Answer-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? - Correct Answer-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? - Correct Answer-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? - Correct Answer-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? - Correct Answer-Air leak in the suction line
It is best to connect fuel units as a one-pipe system instead of two-pipe because? -
Correct Answer-Two pipe systems filter the oil several times causing the filter to clog
faster
A fuel de-aerator? - Correct Answer-Reduces air in oil by eliminating the need for a 2
pipe system
A cause of pulsating oil pump pressure and a pulsating fire is? - Correct Answer-
Partially clogged filter/strainer or an air leak
Increasing the fuel pump pressure will? - Correct Answer-Increase flow rate and
increase atomization
The purpose of a oil burner nozzle is to? - Correct Answer-Atomize, meter and set a
spray pattern for the fuel
When replacing a nozzle? - Correct Answer-Always follow manufacturers
recommendations. Always handle carefully and touch as little as possible
To reduce combustion problems caused by cold oil? - Correct Answer-Increase pump
pressure, nozzle line preheater or blend kerosine or additives with fuel
