OIL BURNER LICENSE EXAM AND
PRACTICE EXAM NEWEST 2024-2025
ACTUAL EXAM COMPLETE
QUESTIONS AND CORRECT DETAILED
ANSWERS (VERIFIED ANSWERS)
|ALREADY GRADED A+
The primary purpose of a fuel pump in a high pressure
burner is to: Correct Answer -Deliver oil at a constant and
regulated pressure to the nozzle
-Move oil from the tank to the pump
-Provide a screen to filter the oil
If the vacuum reading is substantially above the calculated
reading, (with the burner running) the cause may be:
Correct Answer -Plugged fuel filter
-Kinked oil supply line
-Check valve sticking
With most new flame retention burners, the motor speed
is: Correct Answer 3400 rpm
To check for a proper nozzle line cut-off, the pressure
gauge is installed in the: Correct Answer Nozzle port
Fuel units are generally set at the factory at: Correct
Answer 100 psi
,The oil burner nozzle in a high pressure burner performs
the following functions: Correct Answer -Atomizes the oil
-Provides a pattern of oil spray
-Delivers a fixed amount of oil
The nozzle flow rate, spray angle and pattern are directly
related to: Correct Answer -Tangential slots
-Swirl chamber
-Orifice
Cold oil or high viscosity problems may be eliminated by:
Correct Answer -Increasing the pump pressure and
reducing the nozzle size
-Installing a nozzle line pre-heater
The following conditions or elements affect choosing the
correct nozzle spray patterns: Correct Answer -Air-oil
mixing design of the burner
-Shape of the chamber
Which condition affects nozzle spray droplet size? Correct
Answer Fuel pump pressure
To burn one pound of fuel oil, how many pounds of air
does it take? Correct Answer 14.4 lbs
A layer of soot 1/16" thick will increase fuel consumption
by: Correct Answer 4%
,When sizing a combustion chamber for a firing rate of 1.00
gph, you should provide a minimum floor space of: Correct
Answer Between 80 to 100 square inches
A stack switch is no longer allowed to be installed or
replaced because.. Correct Answer It's safety cutout time
is higher than what is now required.
What is a power venter and what does it do? Correct
Answer An electrical device that sends fluid gases into the
chimney connector.
A burner in a confined space using 1 GPH of #2 fuel oil
requires what size permanent opening for combustion air?
Correct Answer 140"
What is the minimum oil supply line size for a residential
system Correct Answer 3/8 inch
A cad cell primary control can lock out safety because
Correct Answer All of the above- dirty, faulty, not sensing
flame
As heating oil gets colder it's viscosity thickens: Correct
Answer Increase
The purpose of the oil burner nozzle is to: Correct Answer
Atomize, pattern and meter the oil
The primary control must be capable of Correct Answer All
of the above
, A decrease in CO2 with an increase in excess air will give
a drop in stack temperature Correct Answer True
Minimum net stack temperature of above 350°F must be
maintained Correct Answer To avoid condensation and
maintain draft
The primary control must be capable of reacting to Correct
Answer The presence or absence of flame
The two principal combustible elements in number two fuel
oil are nitrogen and carbon Correct Answer False
If a stack type controller fails you must Correct Answer
Replace it with an approved type controller
When wiring multiple circulators they should be wired in
Correct Answer Parallel
Oil viscosity problems can be solved by installing a ———
— nozzle and increasing oil pressure Correct Answer
Smaller
Residential burner ignition systems normally operate at
what primary voltage Correct Answer 120
A Call for too much heat on a hot water heating job may
be caused by Correct Answer Thermostat wire is shorted
out
PRACTICE EXAM NEWEST 2024-2025
ACTUAL EXAM COMPLETE
QUESTIONS AND CORRECT DETAILED
ANSWERS (VERIFIED ANSWERS)
|ALREADY GRADED A+
The primary purpose of a fuel pump in a high pressure
burner is to: Correct Answer -Deliver oil at a constant and
regulated pressure to the nozzle
-Move oil from the tank to the pump
-Provide a screen to filter the oil
If the vacuum reading is substantially above the calculated
reading, (with the burner running) the cause may be:
Correct Answer -Plugged fuel filter
-Kinked oil supply line
-Check valve sticking
With most new flame retention burners, the motor speed
is: Correct Answer 3400 rpm
To check for a proper nozzle line cut-off, the pressure
gauge is installed in the: Correct Answer Nozzle port
Fuel units are generally set at the factory at: Correct
Answer 100 psi
,The oil burner nozzle in a high pressure burner performs
the following functions: Correct Answer -Atomizes the oil
-Provides a pattern of oil spray
-Delivers a fixed amount of oil
The nozzle flow rate, spray angle and pattern are directly
related to: Correct Answer -Tangential slots
-Swirl chamber
-Orifice
Cold oil or high viscosity problems may be eliminated by:
Correct Answer -Increasing the pump pressure and
reducing the nozzle size
-Installing a nozzle line pre-heater
The following conditions or elements affect choosing the
correct nozzle spray patterns: Correct Answer -Air-oil
mixing design of the burner
-Shape of the chamber
Which condition affects nozzle spray droplet size? Correct
Answer Fuel pump pressure
To burn one pound of fuel oil, how many pounds of air
does it take? Correct Answer 14.4 lbs
A layer of soot 1/16" thick will increase fuel consumption
by: Correct Answer 4%
,When sizing a combustion chamber for a firing rate of 1.00
gph, you should provide a minimum floor space of: Correct
Answer Between 80 to 100 square inches
A stack switch is no longer allowed to be installed or
replaced because.. Correct Answer It's safety cutout time
is higher than what is now required.
What is a power venter and what does it do? Correct
Answer An electrical device that sends fluid gases into the
chimney connector.
A burner in a confined space using 1 GPH of #2 fuel oil
requires what size permanent opening for combustion air?
Correct Answer 140"
What is the minimum oil supply line size for a residential
system Correct Answer 3/8 inch
A cad cell primary control can lock out safety because
Correct Answer All of the above- dirty, faulty, not sensing
flame
As heating oil gets colder it's viscosity thickens: Correct
Answer Increase
The purpose of the oil burner nozzle is to: Correct Answer
Atomize, pattern and meter the oil
The primary control must be capable of Correct Answer All
of the above
, A decrease in CO2 with an increase in excess air will give
a drop in stack temperature Correct Answer True
Minimum net stack temperature of above 350°F must be
maintained Correct Answer To avoid condensation and
maintain draft
The primary control must be capable of reacting to Correct
Answer The presence or absence of flame
The two principal combustible elements in number two fuel
oil are nitrogen and carbon Correct Answer False
If a stack type controller fails you must Correct Answer
Replace it with an approved type controller
When wiring multiple circulators they should be wired in
Correct Answer Parallel
Oil viscosity problems can be solved by installing a ———
— nozzle and increasing oil pressure Correct Answer
Smaller
Residential burner ignition systems normally operate at
what primary voltage Correct Answer 120
A Call for too much heat on a hot water heating job may
be caused by Correct Answer Thermostat wire is shorted
out
