Exam 4: Fasteners and Thread Repair

Thread repair is used in situations where it is not feasible to replace a damaged thread. Technician A states that this may be because the damaged thread is located in a large expensive component. Technician B states that this may be because replacement parts are expensive or not available. Who is correct?

If a bolt is broken off flush with a surface, and the bolt is large enough in diameter, then you may be able to use a small ________ to turn the bolt by tapping on the outside diameter of the bolt, but in the reverse direction.

Bolts are a cylindrical piece of metal with a(n) _____ head on one end and a thread cut into the shaft at the other end.

Thread repairs can be performed on internal threads, such as in a(n) _________, or on external threads, such as on a bolt.

The easiest way to identify the TPI is to:

_______ is considered a more precise method to tighten TTY bolts and is essentially a multistep process.

Tech A says that when using a Heli-Coil to repair a damaged thread, the Heli-Coil is welded into the bolt hole. Tech B says that when using a solid sleeve type of insert, the damaged threads need to be drilled out with the correct size drill bit. Who is correct?

Which of the following is NOT a question you should ask yourself as you prepare to be as safe as possible?

Tech A says that a common method for repairing damaged internal threads is a thread insert. Tech B says that a thread file is used to repair the threads on the inside of a bolt hole. Who is correct?

To accomplish their job, fasteners come in a variety of diameters and hardnesses, which are defined in:

A _______ is a cylindrical piece of metal with a hexagonal head on one end and a thread cut into the shaft at the other end.

Tech A says that flat washers act as a bearing surface, making it so that the bolt achieves the expected clamping force at the specified torque. Tech B says that lock washers are usually considered single use and should be replaced rather than reused. Who is correct?

When you want a nut or bolt to hold tight such that it needs heat to be removed with a socket and ratchet, you should use a(n):

Technician A states that the aim of thread repair is to restore the thread to a condition that restores the fastening integrity. Technician B states that thread repairs can only be performed on internal threads. Who is correct?

In the standard system, bolts, studs, and nuts are measured in _________.

In an 8 mm bolt, 8 mm refers to the:

All of the following statements are true except:

Tech A says that if a bolt breaks off above the surface, you might be able to remove it using locking pliers or curved jaw Channellock pliers. Tech B says that a hammer and punch can sometimes be used to remove a broken bolt. Who is correct?

Tech A says that torque-to-yield head bolts are tightened to, or just past, their yield point. Tech B says that the yield point is the torque at which the bolt breaks. Who is correct?

Automotive cylinder head bolts withstand tension stresses by clamping the _______ between the cylinder head and the block so that combustion pressures can be contained in the cylinder.