1|Page
Ontario Oil Burner Technician 1 (OBT1) Certification
Exam Actual Test||Verified Questions and Correct
Answers With Rationales LATEST THIS
YEAR.pdf||Newest Exam!!
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 pump pressure and reducing nozzle
size
• Installing a nozzle line pre-heater
,2|Page
The following conditions or elements affect choosing the
correct nozzle spray pattern - Answer-•Air-oil mixing
design of burner
•. Shape of the chamber
Which condition affects nozzle spray droplet size? -
Answer-Fuel Pump Pressure
To burn one pound of fuel oil, it takes how many pounds of
air? - 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) - 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) - Answer-•Between 80 to
100 square inches
The most common type of burner design in use today is
the - Answer-High pressure atomizing
,3|Page
Poor draft due to a faulty chimney may be improved by
installing a good - Answer-•Draft inducer
The pressure 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 breech
The draft over the fire
The proper location to install a draft inducer is - 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 - Answer-Steady state
efficiency
The holes that are provided in the flue pipe for combustion
testing must be - Answer-•Between the heating unit and
the draft regulator
, 4|Page
When using a pump type smoke tester, ten full strokes are
necessary to - Answer-•Draw the proper amount of flue
gas past the paper
In an electric circuit for the wattage to remain the same if
the voltage drops, the amperage must - Answer-Increase
Atomizing type burners were designed to burn which type
of fuel - Answer-Type 2 fuel oil
Pour point problems with outside above ground fuel tanks
can be partially relieved by - 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 - Answer-In the
furnace room with 5' of heating unit.
The primary purpose of a fuel pump on a high-pressure
burner is to - 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 -
Ontario Oil Burner Technician 1 (OBT1) Certification
Exam Actual Test||Verified Questions and Correct
Answers With Rationales LATEST THIS
YEAR.pdf||Newest Exam!!
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 pump pressure and reducing nozzle
size
• Installing a nozzle line pre-heater
,2|Page
The following conditions or elements affect choosing the
correct nozzle spray pattern - Answer-•Air-oil mixing
design of burner
•. Shape of the chamber
Which condition affects nozzle spray droplet size? -
Answer-Fuel Pump Pressure
To burn one pound of fuel oil, it takes how many pounds of
air? - 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) - 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) - Answer-•Between 80 to
100 square inches
The most common type of burner design in use today is
the - Answer-High pressure atomizing
,3|Page
Poor draft due to a faulty chimney may be improved by
installing a good - Answer-•Draft inducer
The pressure 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 breech
The draft over the fire
The proper location to install a draft inducer is - 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 - Answer-Steady state
efficiency
The holes that are provided in the flue pipe for combustion
testing must be - Answer-•Between the heating unit and
the draft regulator
, 4|Page
When using a pump type smoke tester, ten full strokes are
necessary to - Answer-•Draw the proper amount of flue
gas past the paper
In an electric circuit for the wattage to remain the same if
the voltage drops, the amperage must - Answer-Increase
Atomizing type burners were designed to burn which type
of fuel - Answer-Type 2 fuel oil
Pour point problems with outside above ground fuel tanks
can be partially relieved by - 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 - Answer-In the
furnace room with 5' of heating unit.
The primary purpose of a fuel pump on a high-pressure
burner is to - 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 -
