Oil Burner License Exam Study Guide Questions
And Answers Verified 100% Correct
What are the possible causes of soot at or near the power venter? -
ANSWER -Incomplete combustion
What is a possible side effect of air in a nozzle line? - ANSWER -Soot
What is the cause if the cad cell is tripped on safety? - ANSWER -Dirty
cad cell
Faulty cad cell
No flame present
If a boiler is running but the water temperature is low? - ANSWER -
Undersized nozzle
If a boiler is at 30 psi and the relief valve opens? - ANSWER -
Expansion tank is undersized
Tank bladder is perforated
Tankless coil is leaking
,Atomizing type burners were designed to burn which type of fuel? -
ANSWER -#2 oil
One gallon of #2 fuel oil contains approximately: - ANSWER -140,000
BTU's
Pour point problems with outside above ground fuel tanks can be
partially relived by: - ANSWER --Relocating the outside fuel filters and
strainers to the inside
-Switching to #1 fuel oil
-Reducing the pour point of #2 fuel oil by blending it with #1 fuel oil
A fuel oil storage tank cannot be installed: - ANSWER -In the furnace
room within 5 feet of the heating unit
The primary purpose of a fuel pump in a high pressure burner is to: -
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: - ANSWER --Plugged fuel
filter
-Kinked oil supply line
-Check valve sticking
,With most new flame retention burners, the motor speed is: -
ANSWER -
3400 rpm
To check for a proper nozzle line cut-off, the pressure gauge is
installed in the: - ANSWER -Nozzle port
Fuel units are generally set at the factory at: - ANSWER -100 psi
The oil burner nozzle in a high pressure burner performs the following
functions: - 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: -
ANSWER --Tangential slots
-Swirl chamber
-Orifice
Cold oil or high viscosity problems may be eliminated by: - 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: - ANSWER --Air-oil mixing design of the burner
-Shape of the chamber
Which condition affects nozzle spray droplet size? - ANSWER -Fuel
pump pressure
To burn one pound of fuel oil, how many pounds of air does it take? -
ANSWER -14.4 lbs
A layer of soot 1/16" thick will increase fuel consumption by: -
ANSWER
-4%
When sizing a combustion chamber for a firing rate of 1.00 gph, you
should provide a minimum floor space of: - ANSWER -Between 80 to
100 square inches
The most common type of burner design today is the: - ANSWER -
High pressure atomizing
Poor draft due to a faulty chimney may be improved by installing a
good: - ANSWER -Draft inducer
The draft differential produced by chimneys is best measured with a
draft gauge in: - ANSWER -Inches of water column
The most important draft measurement to be taken on any oil-fired
unit is: - ANSWER --The draft at the breach
-The draft over the fire
And Answers Verified 100% Correct
What are the possible causes of soot at or near the power venter? -
ANSWER -Incomplete combustion
What is a possible side effect of air in a nozzle line? - ANSWER -Soot
What is the cause if the cad cell is tripped on safety? - ANSWER -Dirty
cad cell
Faulty cad cell
No flame present
If a boiler is running but the water temperature is low? - ANSWER -
Undersized nozzle
If a boiler is at 30 psi and the relief valve opens? - ANSWER -
Expansion tank is undersized
Tank bladder is perforated
Tankless coil is leaking
,Atomizing type burners were designed to burn which type of fuel? -
ANSWER -#2 oil
One gallon of #2 fuel oil contains approximately: - ANSWER -140,000
BTU's
Pour point problems with outside above ground fuel tanks can be
partially relived by: - ANSWER --Relocating the outside fuel filters and
strainers to the inside
-Switching to #1 fuel oil
-Reducing the pour point of #2 fuel oil by blending it with #1 fuel oil
A fuel oil storage tank cannot be installed: - ANSWER -In the furnace
room within 5 feet of the heating unit
The primary purpose of a fuel pump in a high pressure burner is to: -
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: - ANSWER --Plugged fuel
filter
-Kinked oil supply line
-Check valve sticking
,With most new flame retention burners, the motor speed is: -
ANSWER -
3400 rpm
To check for a proper nozzle line cut-off, the pressure gauge is
installed in the: - ANSWER -Nozzle port
Fuel units are generally set at the factory at: - ANSWER -100 psi
The oil burner nozzle in a high pressure burner performs the following
functions: - 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: -
ANSWER --Tangential slots
-Swirl chamber
-Orifice
Cold oil or high viscosity problems may be eliminated by: - 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: - ANSWER --Air-oil mixing design of the burner
-Shape of the chamber
Which condition affects nozzle spray droplet size? - ANSWER -Fuel
pump pressure
To burn one pound of fuel oil, how many pounds of air does it take? -
ANSWER -14.4 lbs
A layer of soot 1/16" thick will increase fuel consumption by: -
ANSWER
-4%
When sizing a combustion chamber for a firing rate of 1.00 gph, you
should provide a minimum floor space of: - ANSWER -Between 80 to
100 square inches
The most common type of burner design today is the: - ANSWER -
High pressure atomizing
Poor draft due to a faulty chimney may be improved by installing a
good: - ANSWER -Draft inducer
The draft differential produced by chimneys is best measured with a
draft gauge in: - ANSWER -Inches of water column
The most important draft measurement to be taken on any oil-fired
unit is: - ANSWER --The draft at the breach
-The draft over the fire
