OIL BURNER'S TEST QUESTIONS &
UPDATED CORRECT ANSWERS
PASSED ALREADY GRADED A+
In an electric circuit for the wattage to remain the same if the voltage drops, the
amperage must - CORRECT ANSWER Increase
Atomizing type burners were designed to burn which type of fuel - CORRECT
ANSWER Type 2 fuel oil
Pour point problems with outside above ground fuel tanks can be partially relieved by -
CORRECT ANSWER Reducing the pour point of No. 2 fuel oil by blending it with No. 1
fuel oil.
A fuel oil storage tank cannot be installed - CORRECT ANSWER In the furnace room
with 5' of heating unit.
The primary purpose of a fuel pump on a high-pressure burner is to - CORRECT
ANSWER Deliver oil at a constant and regulated pressure to the nozzle
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
3450
To check for 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 100psi
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 pump pressure and reducing nozzle size
• Installing a nozzle line pre-heater
The following conditions or elements affect choosing the correct nozzle spray pattern -
CORRECT ANSWER •Air-oil mixing design of burner
•. Shape of the chamber
Which condition affects nozzle spray droplet size? - CORRECT ANSWER Fuel Pump
Pressure
To burn one pound of fuel oil, it takes how many pounds of air? - CORRECT ANSWER
•14.4 lbs.
A layer of soot 1/16" thick will increase fuel consumption by (Fuel consumption increase
by 2 % for each 1/32 of soot) - CORRECT ANSWER 8%
When sizing a combustion chamber for a firing rate of 1.00 gph you should provide a
minimum floor space of (•20 square inches per 0.25 of GPH) - CORRECT ANSWER
•Between 80 to 100 square inches
The most common type of burner design in use today is the - CORRECT ANSWER
High pressure atomizing
Poor draft due to a faulty chimney may be improved by installing a good - CORRECT
ANSWER •Draft inducer
The pressure differential produced by chimneys is best measured with a draft gauge in -
CORRECT ANSWER Inches of water column
The most important draft measurement to be taken on any oil-fired unit is - CORRECT
ANSWER The draft at the breech
The draft over the fire
The proper location to install a draft inducer is - CORRECT ANSWER •In the flue pipe
between the draft regulator and the chimney
Using combustion test instruments to measure the composition and temperature of the
flue gas as they leave the heating unit will indicate the - CORRECT ANSWER Steady
state efficiency
The holes that are provided in the flue pipe for combustion testing must be - CORRECT
ANSWER •Between the heating unit and the draft regulator
UPDATED CORRECT ANSWERS
PASSED ALREADY GRADED A+
In an electric circuit for the wattage to remain the same if the voltage drops, the
amperage must - CORRECT ANSWER Increase
Atomizing type burners were designed to burn which type of fuel - CORRECT
ANSWER Type 2 fuel oil
Pour point problems with outside above ground fuel tanks can be partially relieved by -
CORRECT ANSWER Reducing the pour point of No. 2 fuel oil by blending it with No. 1
fuel oil.
A fuel oil storage tank cannot be installed - CORRECT ANSWER In the furnace room
with 5' of heating unit.
The primary purpose of a fuel pump on a high-pressure burner is to - CORRECT
ANSWER Deliver oil at a constant and regulated pressure to the nozzle
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
3450
To check for 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 100psi
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 pump pressure and reducing nozzle size
• Installing a nozzle line pre-heater
The following conditions or elements affect choosing the correct nozzle spray pattern -
CORRECT ANSWER •Air-oil mixing design of burner
•. Shape of the chamber
Which condition affects nozzle spray droplet size? - CORRECT ANSWER Fuel Pump
Pressure
To burn one pound of fuel oil, it takes how many pounds of air? - CORRECT ANSWER
•14.4 lbs.
A layer of soot 1/16" thick will increase fuel consumption by (Fuel consumption increase
by 2 % for each 1/32 of soot) - CORRECT ANSWER 8%
When sizing a combustion chamber for a firing rate of 1.00 gph you should provide a
minimum floor space of (•20 square inches per 0.25 of GPH) - CORRECT ANSWER
•Between 80 to 100 square inches
The most common type of burner design in use today is the - CORRECT ANSWER
High pressure atomizing
Poor draft due to a faulty chimney may be improved by installing a good - CORRECT
ANSWER •Draft inducer
The pressure differential produced by chimneys is best measured with a draft gauge in -
CORRECT ANSWER Inches of water column
The most important draft measurement to be taken on any oil-fired unit is - CORRECT
ANSWER The draft at the breech
The draft over the fire
The proper location to install a draft inducer is - CORRECT ANSWER •In the flue pipe
between the draft regulator and the chimney
Using combustion test instruments to measure the composition and temperature of the
flue gas as they leave the heating unit will indicate the - CORRECT ANSWER Steady
state efficiency
The holes that are provided in the flue pipe for combustion testing must be - CORRECT
ANSWER •Between the heating unit and the draft regulator
