OBT3 Exam Newest Exam 2026 | All Questions
and Correct Answers | Verified Answers |
Brand New Version | Just Released
Atomizing is defined as:
a) Breaking oil into small droplets.
b) Compressing oil into a thin film
c) Joining together small amounts of oil into large drops of oil
d) Sending an electrical current through oil ---------CORRECT ANSWER-----------------
A
Which of the following statements is correct a) Atomizing type burners always use
high pressure pumps
b) Atomizing type burners always require manual ignition
c) Atomizing type burners only burn No. 1 fuel oil
d) Atomizing type burners are more common than vaporizing type ---------
CORRECT ANSWER-----------------D
A vaporizing pot burner is commonly ignited: a) By ignition electrodes.
b) Manually
c) By a gas pilot.
d) By intermittent spark igniters. ---------CORRECT ANSWER-----------------B
,Which of the following statements is correct: a) Constant level oil valves are only
used on vaporizing pot burners.
b) Constant level oil valves pump the oil into the burner
c) Constant level oil valves will prevent oil from flooding a burner if kept clean
d) Constant level oil valves will always prevent oil from flooding a burner ---------
CORRECT ANSWER-----------------C
Fuel is delivered to a vaporizing pot type burner by:
a) A fuel oil pump.
b) Gravity feed directly from the tank.
c) Pouring it in manually
d) A float operated constant level oil valve ---------CORRECT ANSWER-----------------
D
A horizontal rotary burner uses a ___________(low or high) speed motor that
delivers a ________(small or large) percentage of the air required for complete
combustion ---------CORRECT ANSWER-----------------High, small
True or False:
Horizontal rotary burners can only burn No. 2 fuel oil. ---------CORRECT ANSWER---
--------------False
,True or False:
Used oil burners can be used for residential furnaces or boilers. ---------CORRECT
ANSWER-----------------False
High pressure burners are categorized (classified) by which one of the following
components:
a) Blower fan
b) Combustion head
c) Ignition system
d) Pump pressure ---------CORRECT ANSWER-----------------B
Which of the following statements is correct: a) Conventional head burners use
3450 RPM motors
b) Shell head burners require at least three different air adjustments for proper
setup.
c) Flame retention head burners always use 3450 RPM motors.
d) A static disc must be used with all flame retention head burners. ---------
CORRECT ANSWER-----------------B
True or False:
, The shorter, hotter flame developed by a flame retention burner is created by
adding more excess air at higher pressure ---------CORRECT ANSWER-----------------
False
The major difference between high static pressure burners and low static
pressure burners is:
a) The combustion head
b) The pump pressure.
c) The design of the ignition system.
d) The design of the air scroll and combustion blower fan. ---------CORRECT
ANSWER-----------------D
Which of the following statements is correct? a) A burner does not have to be
specifically approved with an particular appliance
b) A burner's rating plate determines the maximum input of an appliance
c) An appliance can be overfired by 10 % above the maximum specified on the
appliance rating plate
d) A burner that is not listed on the appliance rating plate must not be installed on
that appliance if not approved as a replacement burner for the appliance ---------
CORRECT ANSWER-----------------D
True or False:
Any type of motor can be used with any oil burner. ---------CORRECT ANSWER-------
----------False
and Correct Answers | Verified Answers |
Brand New Version | Just Released
Atomizing is defined as:
a) Breaking oil into small droplets.
b) Compressing oil into a thin film
c) Joining together small amounts of oil into large drops of oil
d) Sending an electrical current through oil ---------CORRECT ANSWER-----------------
A
Which of the following statements is correct a) Atomizing type burners always use
high pressure pumps
b) Atomizing type burners always require manual ignition
c) Atomizing type burners only burn No. 1 fuel oil
d) Atomizing type burners are more common than vaporizing type ---------
CORRECT ANSWER-----------------D
A vaporizing pot burner is commonly ignited: a) By ignition electrodes.
b) Manually
c) By a gas pilot.
d) By intermittent spark igniters. ---------CORRECT ANSWER-----------------B
,Which of the following statements is correct: a) Constant level oil valves are only
used on vaporizing pot burners.
b) Constant level oil valves pump the oil into the burner
c) Constant level oil valves will prevent oil from flooding a burner if kept clean
d) Constant level oil valves will always prevent oil from flooding a burner ---------
CORRECT ANSWER-----------------C
Fuel is delivered to a vaporizing pot type burner by:
a) A fuel oil pump.
b) Gravity feed directly from the tank.
c) Pouring it in manually
d) A float operated constant level oil valve ---------CORRECT ANSWER-----------------
D
A horizontal rotary burner uses a ___________(low or high) speed motor that
delivers a ________(small or large) percentage of the air required for complete
combustion ---------CORRECT ANSWER-----------------High, small
True or False:
Horizontal rotary burners can only burn No. 2 fuel oil. ---------CORRECT ANSWER---
--------------False
,True or False:
Used oil burners can be used for residential furnaces or boilers. ---------CORRECT
ANSWER-----------------False
High pressure burners are categorized (classified) by which one of the following
components:
a) Blower fan
b) Combustion head
c) Ignition system
d) Pump pressure ---------CORRECT ANSWER-----------------B
Which of the following statements is correct: a) Conventional head burners use
3450 RPM motors
b) Shell head burners require at least three different air adjustments for proper
setup.
c) Flame retention head burners always use 3450 RPM motors.
d) A static disc must be used with all flame retention head burners. ---------
CORRECT ANSWER-----------------B
True or False:
, The shorter, hotter flame developed by a flame retention burner is created by
adding more excess air at higher pressure ---------CORRECT ANSWER-----------------
False
The major difference between high static pressure burners and low static
pressure burners is:
a) The combustion head
b) The pump pressure.
c) The design of the ignition system.
d) The design of the air scroll and combustion blower fan. ---------CORRECT
ANSWER-----------------D
Which of the following statements is correct? a) A burner does not have to be
specifically approved with an particular appliance
b) A burner's rating plate determines the maximum input of an appliance
c) An appliance can be overfired by 10 % above the maximum specified on the
appliance rating plate
d) A burner that is not listed on the appliance rating plate must not be installed on
that appliance if not approved as a replacement burner for the appliance ---------
CORRECT ANSWER-----------------D
True or False:
Any type of motor can be used with any oil burner. ---------CORRECT ANSWER-------
----------False
