Font size
WorksheetsChapter 12 (Fastener & Thread Repair) Quiz
Total questions: 20
Worksheet time: 10mins
Which of the following is NOT a common type of fastener?
A. Bolt
B. Nut
C. Stud
D. Gear
A bolt’s grade is identified by:
Markings on the head
Its length
The size of the nut used with it
Its thread pitch only
Cross-threading occurs when:
A bolt is started at the wrong angle
A bolt is properly lubricated
A nut is torqued to spec
The wrong wrench is used
A tap is used to:
Cut or restore internal threads
Cut or restore external threads
Remove broken bolts
Torque bolts
A die is used to:
Cut internal threads
Cut or restore external threads
Chase threads only
Install inserts
A Helicoil is installed when:
Threads are lightly corroded
A threaded hole is completely stripped
A bolt breaks off flush
Torque is too high
Which of the following is a common cause of thread damage?
Cross-threading
Over-tightening
Corrosion
All of the above
Match the tool or issue to its description.
Replaces damaged threads inside a hole
Occurs when a bolt is started crooked
Cleans existing threads without cutting
Replaces damaged threads inside a hole
Occurs when a bolt is started crooked
Used to remove broken bolts
Used to apply correct tightening force
Used to apply correct tightening force
Used to remove broken bolts
Cleans existing threads without cutting
Overtightening bolts can cause stretching and failure.
True
False
A die cuts internal threads inside a hole.
True
False
Broken bolts should always be hammered out.
True
False
Lubrication reduces friction and helps prevent thread galling.
True
False
The __________ is the distance between the peaks of threads.
pitch
diameter
lead
radius
Fastener strength is indicated by __________ on the bolt head.
markings
threads
length
color
It is important to use a torque wrench when tightening fasteners because:
it ensures the correct amount of tightness is applied
it makes the process faster
it prevents the need for any lubrication
it guarantees the fastener will never loosen
Two common ways threads can be damaged and how each can be prevented are:
Cross-threading and over-tightening; prevented by proper alignment and using correct torque.
Rusting and painting; prevented by using oil and sandpaper.
Melting and freezing; prevented by heating and cooling.
Stretching and shrinking; prevented by pulling and pushing.
What device is used with a nut to fasten together two pieces of metal?
bolt
glue
nail
screw
A farmer uses a lock washer between a nut and the surface of the metal to:
keep the nut tight.
keep the threads clean.
make self-tapping threads.
make the nut easy to remove.
Which tool would you use to clean out slightly damaged threads without cutting new material?
Tap
Die
Thread chaser
Helicoil
If a bolt is tightened past its yield strength, what is most likely to happen?
It becomes stronger
It stretches and may break
It seals more tightly
Nothing changes
