MILLWRIGHT LEVEL 3 EXAM SCRIPT 2026
TEST PAPER QUESTIONS AND SOLUTIONS
GRADED A+
◉ The kind of abrasive material used in grinding wheels for general
purpose applications is:
Answer: aluminum oxide
◉ A blotter is used on a grinding wheel to:
Answer: protect the flanges from the abrasize grit, display
information about the wheel and compensate for the uneven
surfaces on the wheel
◉ Flanges should at least be:
Answer: 1/3 the diameter of the wheel
◉ The best wheel to use for cleaning scale and dirt off a workpiece is
the:
Answer: wire wheel
◉ What is a natural abrasive?
Answer: made of natural material rather than synthetic
,◉ Under properties of abrasives, to what does the term hardness
refer?
Answer: ability of a material to scratch or penetrate another
material
◉ The ____ is the part of the wheel that holds the grains together
Answer: bond
◉ Markings for the wheel identification can be found on the _______
Answer: Blotter
◉ What is the recommended speed to run a grinding wheel?
Answer: Never run it faster that the max RPM of the grinding wheel
◉ How should you start a grinder?
Answer: Stand off to the side and wait a full minute
◉ Is 46 or 60 the coarser grit?
Answer: 46
◉ What are the 2 most commonly used abrasive materials?
,Answer: Aluminum oxide and silicone carbide
◉ For what purpose is the diamond dresser used?
Answer: When a very fine finish is required
◉ What is the purpose of ring test?
Answer: to check for cracks
◉ If a grinding wheel makes a ringing sound what does that mean?
Answer: wheel is not cracked
◉ What is the purpose of truing a grinding wheel?
Answer: Restores the shape of the wheel and makes the outer
surface of the wheel concentric with its bore
◉ An out of balance wheel:
Answer: vibrates
◉ Belt grinders are useful for:
Answer: quickly deburring and chamfering a workpiece
◉ What is the purpose of a GFCI?
, Answer: Senses drop in current and switches power off
◉ The kind of abrasive material use in grinding wheels for general
purpose application is:
Answer: aluminum oxide
◉ Is it safe to carry a portable grinder by the power cord?
Answer: False
◉ Is it safe to use standard sockets with electric impact wrenches
Answer: False
◉ The larger the power drill, the slower the RPMs and the higher the
torque
Answer: True
◉ Can you use conventional drill bits with a hammer drill? Why or
why not?
Answer: Yes of the hammer drill has a switch to turn off hammer
action
◉ Most cordless drills have torque control
Answer: True
TEST PAPER QUESTIONS AND SOLUTIONS
GRADED A+
◉ The kind of abrasive material used in grinding wheels for general
purpose applications is:
Answer: aluminum oxide
◉ A blotter is used on a grinding wheel to:
Answer: protect the flanges from the abrasize grit, display
information about the wheel and compensate for the uneven
surfaces on the wheel
◉ Flanges should at least be:
Answer: 1/3 the diameter of the wheel
◉ The best wheel to use for cleaning scale and dirt off a workpiece is
the:
Answer: wire wheel
◉ What is a natural abrasive?
Answer: made of natural material rather than synthetic
,◉ Under properties of abrasives, to what does the term hardness
refer?
Answer: ability of a material to scratch or penetrate another
material
◉ The ____ is the part of the wheel that holds the grains together
Answer: bond
◉ Markings for the wheel identification can be found on the _______
Answer: Blotter
◉ What is the recommended speed to run a grinding wheel?
Answer: Never run it faster that the max RPM of the grinding wheel
◉ How should you start a grinder?
Answer: Stand off to the side and wait a full minute
◉ Is 46 or 60 the coarser grit?
Answer: 46
◉ What are the 2 most commonly used abrasive materials?
,Answer: Aluminum oxide and silicone carbide
◉ For what purpose is the diamond dresser used?
Answer: When a very fine finish is required
◉ What is the purpose of ring test?
Answer: to check for cracks
◉ If a grinding wheel makes a ringing sound what does that mean?
Answer: wheel is not cracked
◉ What is the purpose of truing a grinding wheel?
Answer: Restores the shape of the wheel and makes the outer
surface of the wheel concentric with its bore
◉ An out of balance wheel:
Answer: vibrates
◉ Belt grinders are useful for:
Answer: quickly deburring and chamfering a workpiece
◉ What is the purpose of a GFCI?
, Answer: Senses drop in current and switches power off
◉ The kind of abrasive material use in grinding wheels for general
purpose application is:
Answer: aluminum oxide
◉ Is it safe to carry a portable grinder by the power cord?
Answer: False
◉ Is it safe to use standard sockets with electric impact wrenches
Answer: False
◉ The larger the power drill, the slower the RPMs and the higher the
torque
Answer: True
◉ Can you use conventional drill bits with a hammer drill? Why or
why not?
Answer: Yes of the hammer drill has a switch to turn off hammer
action
◉ Most cordless drills have torque control
Answer: True
