Oil burner's test questions 1-200 Exam
2025 Questions and Answers
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
....COPYRIGHT ©️ 2025 ALL RIGHTS RESERVED...TRUSTED & VERIFIED 1
,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
....COPYRIGHT ©️ 2025 ALL RIGHTS RESERVED...TRUSTED & VERIFIED 2
, 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
....COPYRIGHT ©️ 2025 ALL RIGHTS RESERVED...TRUSTED & VERIFIED 3
2025 Questions and Answers
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
....COPYRIGHT ©️ 2025 ALL RIGHTS RESERVED...TRUSTED & VERIFIED 1
,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
....COPYRIGHT ©️ 2025 ALL RIGHTS RESERVED...TRUSTED & VERIFIED 2
, 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
....COPYRIGHT ©️ 2025 ALL RIGHTS RESERVED...TRUSTED & VERIFIED 3
