OBT3 EXAM TEST SCRIPT 2026 TEST
PAPER QUESTIONS AND SOLUTIONS
CERTIFICATION REVIEW GRADED
A+
◉ What is the minimum acceptable type of respiratory protection to be
used when cleaning a soot filled furnace?. Answer: Disposable Filter
Masks
◉ What is the proper vertical to horizontal distance ratio for ladder
placement?. Answer: 3:1 or 4:1
◉ What muscles or parts of your body should you primarily use to lift a
weight from the floor?. Answer: Stomach muscles and legs
◉ When changing a drill bit or saw blade on a power tool, what is first
action that you should take?. Answer: Disconnect from the power source
◉ Name two safety concerns created by the customer's housekeeping
practices?. Answer: Messy and poor lit work areas
◉ Name two areas that each of the following substances may be
encountered in the oil heat trade: Asbestos and Silica:. Answer:
Insulation, older ceiling tile
Refactory material, cement
,◉ You must never use a chisel with a ______________ head. Answer:
Mushroomed
◉ Name three types of pliers:. Answer: Side locked
Linesman
Needle-nose
◉ A _____________ wrench is better suited to loosening tight nuts..
Answer: Box
◉ Name three types of snips:. Answer: Combination
Compound
Straight
◉ A masonry drill bit is suited for drilling into concrete due to its
____________ tip. Answer: Carbide
◉ ______________ hammers are best suited for striking chisels..
Answer: Ball Peen
◉ Name three types of screwdrivers:. Answer: Phillips
Robertson
Slotted
,◉ ___________ should be used when making sharp turn cuts in sheet
metal?. Answer: Compound Snips (Aviation Snips)
◉ Name four types of wrenches. Answer: Open end, box end,
cominations , adjustable
◉ Pliers should not be exposed to excessive:. Answer: Heat
◉ _____________ and ____________ determine a screw size.. Answer:
Length and Diameter
◉ A ______________ is used to anchor into a hollow wall.. Answer:
Toggle Bolt
◉ True or False:
Sheet metal screws are self tapping.. Answer: True
◉ "__________" cleat and an "__________" cleat are used to join sheet
metal connections.. Answer: "S" and "Drive"
◉ Name three types of screw heads:. Answer: Philips, Robertson,
Slotted
◉ A round headed bolt is called a:. Answer: Carriage Bolt
, ◉ Name the two types of thread forms:. Answer: National Fine,
National Course
◉ A ____________ hole is required to start most screw types.. Answer:
Pilot
◉ A sheet metal joint can be further sealed with the use of___________.
Answer: High temp foil tape
◉ Washers help prevent a nut from:. Answer: Loosening
◉ The volume of a structure which measures 10 ' long x 6 ' wide x 8
high is:. Answer: 480 cu. Ft.
◉ The centigrade system of measurement is broken into __________
units.. Answer: 100
◉ The widest measurement of a circle is called the:. Answer: Diameter
◉ Which oil nozzle has a wider spray angle:
a) 70° nozzle spray
b) 90 nozzle spray
c)450 nozzle spray
d) 60 nozzle spray. Answer: B
PAPER QUESTIONS AND SOLUTIONS
CERTIFICATION REVIEW GRADED
A+
◉ What is the minimum acceptable type of respiratory protection to be
used when cleaning a soot filled furnace?. Answer: Disposable Filter
Masks
◉ What is the proper vertical to horizontal distance ratio for ladder
placement?. Answer: 3:1 or 4:1
◉ What muscles or parts of your body should you primarily use to lift a
weight from the floor?. Answer: Stomach muscles and legs
◉ When changing a drill bit or saw blade on a power tool, what is first
action that you should take?. Answer: Disconnect from the power source
◉ Name two safety concerns created by the customer's housekeeping
practices?. Answer: Messy and poor lit work areas
◉ Name two areas that each of the following substances may be
encountered in the oil heat trade: Asbestos and Silica:. Answer:
Insulation, older ceiling tile
Refactory material, cement
,◉ You must never use a chisel with a ______________ head. Answer:
Mushroomed
◉ Name three types of pliers:. Answer: Side locked
Linesman
Needle-nose
◉ A _____________ wrench is better suited to loosening tight nuts..
Answer: Box
◉ Name three types of snips:. Answer: Combination
Compound
Straight
◉ A masonry drill bit is suited for drilling into concrete due to its
____________ tip. Answer: Carbide
◉ ______________ hammers are best suited for striking chisels..
Answer: Ball Peen
◉ Name three types of screwdrivers:. Answer: Phillips
Robertson
Slotted
,◉ ___________ should be used when making sharp turn cuts in sheet
metal?. Answer: Compound Snips (Aviation Snips)
◉ Name four types of wrenches. Answer: Open end, box end,
cominations , adjustable
◉ Pliers should not be exposed to excessive:. Answer: Heat
◉ _____________ and ____________ determine a screw size.. Answer:
Length and Diameter
◉ A ______________ is used to anchor into a hollow wall.. Answer:
Toggle Bolt
◉ True or False:
Sheet metal screws are self tapping.. Answer: True
◉ "__________" cleat and an "__________" cleat are used to join sheet
metal connections.. Answer: "S" and "Drive"
◉ Name three types of screw heads:. Answer: Philips, Robertson,
Slotted
◉ A round headed bolt is called a:. Answer: Carriage Bolt
, ◉ Name the two types of thread forms:. Answer: National Fine,
National Course
◉ A ____________ hole is required to start most screw types.. Answer:
Pilot
◉ A sheet metal joint can be further sealed with the use of___________.
Answer: High temp foil tape
◉ Washers help prevent a nut from:. Answer: Loosening
◉ The volume of a structure which measures 10 ' long x 6 ' wide x 8
high is:. Answer: 480 cu. Ft.
◉ The centigrade system of measurement is broken into __________
units.. Answer: 100
◉ The widest measurement of a circle is called the:. Answer: Diameter
◉ Which oil nozzle has a wider spray angle:
a) 70° nozzle spray
b) 90 nozzle spray
c)450 nozzle spray
d) 60 nozzle spray. Answer: B
