NORA STUDY GUIDE EXAM
QUESTIONS & ACTUAL CORRECT
ANSWERS LATEST VERSION
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 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 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
QUESTIONS & ACTUAL CORRECT
ANSWERS LATEST VERSION
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 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 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
