Bronze Cross Exam Questions and Answers 100% Pass
The key final adjustment for most oil burners is? - (ANSWERS)Combustion Air
Dirt or lint build-up in the bevel of the burner fan blades will? - (ANSWERS)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? -
(ANSWERS)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? - (ANSWERS)Allows manufacturers to create
tighter more efficient heat exchangers
One gallon of #2 fuel oil contains approximately? - (ANSWERS)140,000 BTU'S
All petroleum products are chemical compounds of? - (ANSWERS)Carbon & Hydrogen
The flash point of a fuel is an indication of? - (ANSWERS)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? - (ANSWERS)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? - (ANSWERS)The lowest point at which fuel will flow. 17 degrees
As heating oil gets colder it's viscosity? - (ANSWERS)Increases
Sulfuric acid in combustion gases can? - (ANSWERS)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? - (ANSWERS)Water
To insure clean, uncontaminated fuel reaches the oil burner? - (ANSWERS)Make sure to use a
clean oil filter at the tank
Water in oil tanks comes from? - (ANSWERS)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? - (ANSWERS)Fill and vent are pitched downwards, install
oil filter
Oil lines buried in concrete should be? - (ANSWERS)Covered copper oil line
, Bronze Cross Exam Questions and Answers 100% Pass
Fuel units (oil pumps) perform the following function - (ANSWERS)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? - (ANSWERS)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? - (ANSWERS)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? - (ANSWERS)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? -
(ANSWERS)Air leak in the suction line
It is best to connect fuel units as a one-pipe system instead of two-pipe because? -
(ANSWERS)Two pipe systems filter the oil several times causing the filter to clog faster
A fuel de-aerator? - (ANSWERS)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? - (ANSWERS)Partially clogged
filter/strainer or an air leak
Increasing the fuel pump pressure will? - (ANSWERS)Increase flow rate and increase
atomization
The purpose of a oil burner nozzle is to? - (ANSWERS)Atomize, meter and set a spray pattern for
the fuel
When replacing a nozzle? - (ANSWERS)Always follow manufacturers recommendations.
Always handle carefully and touch as little as possible
To reduce combustion problems caused by cold oil? - (ANSWERS)Increase pump pressure,
nozzle line preheater or blend kerosine or additives with fuel
Nozzle after-drip can be caused by? - (ANSWERS)A defective pump shutoff valve, air entrapped
in nozzle line, oil expansion in nozzle caused by exsessive radiant heat
The flow rate stamped on the nozzle is based on? - (ANSWERS)100 PSI pumps
A proper combustion chamber? - (ANSWERS)Must be made of the proper material and properly
sized
Too much draft over the fire can occur when? - (ANSWERS)The draft regulator is sealed shut
The key final adjustment for most oil burners is? - (ANSWERS)Combustion Air
Dirt or lint build-up in the bevel of the burner fan blades will? - (ANSWERS)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? -
(ANSWERS)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? - (ANSWERS)Allows manufacturers to create
tighter more efficient heat exchangers
One gallon of #2 fuel oil contains approximately? - (ANSWERS)140,000 BTU'S
All petroleum products are chemical compounds of? - (ANSWERS)Carbon & Hydrogen
The flash point of a fuel is an indication of? - (ANSWERS)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? - (ANSWERS)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? - (ANSWERS)The lowest point at which fuel will flow. 17 degrees
As heating oil gets colder it's viscosity? - (ANSWERS)Increases
Sulfuric acid in combustion gases can? - (ANSWERS)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? - (ANSWERS)Water
To insure clean, uncontaminated fuel reaches the oil burner? - (ANSWERS)Make sure to use a
clean oil filter at the tank
Water in oil tanks comes from? - (ANSWERS)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? - (ANSWERS)Fill and vent are pitched downwards, install
oil filter
Oil lines buried in concrete should be? - (ANSWERS)Covered copper oil line
, Bronze Cross Exam Questions and Answers 100% Pass
Fuel units (oil pumps) perform the following function - (ANSWERS)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? - (ANSWERS)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? - (ANSWERS)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? - (ANSWERS)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? -
(ANSWERS)Air leak in the suction line
It is best to connect fuel units as a one-pipe system instead of two-pipe because? -
(ANSWERS)Two pipe systems filter the oil several times causing the filter to clog faster
A fuel de-aerator? - (ANSWERS)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? - (ANSWERS)Partially clogged
filter/strainer or an air leak
Increasing the fuel pump pressure will? - (ANSWERS)Increase flow rate and increase
atomization
The purpose of a oil burner nozzle is to? - (ANSWERS)Atomize, meter and set a spray pattern for
the fuel
When replacing a nozzle? - (ANSWERS)Always follow manufacturers recommendations.
Always handle carefully and touch as little as possible
To reduce combustion problems caused by cold oil? - (ANSWERS)Increase pump pressure,
nozzle line preheater or blend kerosine or additives with fuel
Nozzle after-drip can be caused by? - (ANSWERS)A defective pump shutoff valve, air entrapped
in nozzle line, oil expansion in nozzle caused by exsessive radiant heat
The flow rate stamped on the nozzle is based on? - (ANSWERS)100 PSI pumps
A proper combustion chamber? - (ANSWERS)Must be made of the proper material and properly
sized
Too much draft over the fire can occur when? - (ANSWERS)The draft regulator is sealed shut
