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...
Millwright Level 1 Exam Questions &
Answers 2025 Update
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
The reason for the crown on the end of a flat scraper is: - Answer-so that the outside
edges do not dig into the finished workpiece
What is a purpose of a flat (cold) chisel? - Answer-cutting off rivets
What is a chisel made from? - Answer-high carbon steel
What are 2 types of cleaning? - Answer-1. Chemical 2. Mechanical
Alkaline cleaning must only be used on what metal? - Answer-Iron
Barrel finishing: - Answer-IS a quick and inexpensive cleaning method
Rolled threads are advantageous over machined threads because: - Answer-They have
increased tensile strength
They produce a burnished thread finish
They have better wear resistance which reduces fatigue and shear problems
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
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
Prolonged use of power or air tools can cause carpal tunnel sydrome - Answer-True
Is it safe to run an impact wrench with a universal joint and socket attached - Answer-
No because it may throw off attachments
What conditions would you use a GFCI - Answer-Wet conditions
What 3 things does a GFCI protect: - Answer-1. Overload 2. Overcurrent 3. Ground fault
protection
, A GFCI prevents all electrical shocks - Answer-False
Higher voltage on a battery means: - Answer-Greater power of tool
What type of power load must be used in the low velocity tool? Why? - Answer-Power
load with a crimped end must be used cause high power load would get lodged in the
tool
6 colours ranging from lowest strength to highest strength for power load are: - Answer-
1. Grey 2. Brown 3. Green 4. Yellow 5. Red 6. Purple
Power loads should not be carried loosely in pockets or aprons. Why? - Answer-Could
be set off causing serious injury or death
Fasteners used in explosive actuated tools are: - Answer-Manufactured from special
steel and tempered
A drive pin is a fastener used to: - Answer-Permanently attach one material to another
What is base material? - Answer-Material which the fastener shank is driven into
To determine the sustainability of a base material, use a fastener as a centre punch
struck by a single average hammer blow. If the fastener is blunted ( meaning it can't
fasten) the material is too: - Answer-Hard
A threaded knurled pin is designed for what material - Answer-Mild steel
To be a qualified operator of an explosive actuated tool you must posses: - Answer-
training in the use of each tool and familiarity with local safety regulations
OH&S states that operators of explosive actuate tools should always wear: - Answer-
Eye protection
If a tool is found to be defective, you should: - Answer-Mark it defective and call a
service representative
According to OH&S, what safety equipment is required when using an explosive actuate
tool in a confined area such as a small room? - Answer-ear plugs and eye protection
Who is responsible if an accident occurs as a result of an unattended explosive
actuated tool? - Answer-The operator
Should an explosive actuated tool be used in explosive or flammable area? - Answer-
No
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