Deck 4: Fasteners and Thread Repair

Question 1

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

A) What could go wrong?
B) What PPE should I use?
C) How can I finish this task as fast as possible?
D) Have I been trained to use this piece of equipment?

Answer 1

C

Question 2

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

A) ranks.
B) grades.
C) sizes.
D) All of the answers listed

Answer 2

B

Question 3

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.

A) Lug studs
B) Fasteners
C) Chassis dynamometer
D) Head gasket

Answer 3

D

Question 4

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.

A) Octagonal
B) Square
C) Hexagonal
D) Circular

Question 5

Each bolt diameter in the standard system can have one of two thread pitches, _____ or UNF.

A) ANC
B) UNC
C) ANF
D) ENC

Question 6

Technician A states that fastener technology has remained unchanged over the decades. Technician B states that torque-to-yield means that a fastener is torqued to, or just beyond, its yield point. Who is correct?

A) Technician A
B) Technician B
C) Both A and B
D) Neither A nor B

Question 7

When bolts are tightened, they are also:

A) weakened.
B) stretched.
C) compromised.
D) None of the answers listed

Question 8

Tech A says that most metric fasteners can be identified by the grade number cast into the head of the bolt. Tech B says that standard bolts can generally be identified by hash marks cast into the head of the bolt indicating the bolt's grade. Who is correct?

A) Tech A
B) Tech B
C) Both A and B
D) Neither A nor B

Question 9

Tech A says that a standard grade 5 bolt is stronger than a standard grade 8 bolt. Tech B says that a metric grade 12.9 bolt is stronger than a metric grade 4.6 bolt. Who is correct?

A) Tech A
B) Tech B
C) Both A and B
D) Neither A nor B

Question 10

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?

A) Tech A
B) Tech B
C) Both A and B
D) Neither A nor B

Question 11

All of the following statements are true except:

A) Metric bolts can be identified by the grade number on the top of the bolt heads.
B) Measuring units of standard bolts use a fractional number-based system.
C) Standard bolts can be identified by the hash marks on the top of the bolt heads.
D) Measuring units of metric bolts use a roman number-based system.

Question 12

The easiest way to identify the TPI is to:

A) use a vernier caliper.
B) count the number of threads.
C) measure distance from peak to peak.
D) use a thread pitch gauge.

Question 13

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

A) length of the bolt.
B) size of the bolt head.
C) threads' outer diameter.
D) number of threads per inch.

Question 14

Tech A says that antiseize compound is a type of thread-locking compound. Tech B says that thread-locking compounds acts like very strong glue. Who is correct?

A) Tech A
B) Tech B
C) Both A and B
D) Neither A nor B

Question 15

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):

A) lubricant.
B) blue thread-locking compound.
C) antiseize compound.
D) red thread-locking compound.

Question 16

Which of these has a fluted tip to drill a hole into the base material so that there is no need for a pilot hole?

A) Machine screw
B) Self-tapping screw
C) Trim screw
D) Sheet metal screw

Question 17

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?

A) Tech A
B) Tech B
C) Both A and B
D) Neither A nor B

Question 18

Torque-to-yield bolts:

A) should be tightened using torque angle.
B) can be reused multiple times.
C) cannot be torqued beyond the elastic phase.
D) do not get stretched.

Question 19

If a bolt extractor breaks while removing a broken bolt:

A) it will be almost impossible to remove.
B) the broken extractor should be drilled out.
C) the broken extractor should come out easily.
D) None of the answers listed

Question 20

_________ and Vernier calipers may be used to determine the type and size of the thread to be repaired.

A) Rulers
B) Thread pitch gauges
C) Tape measures
D) None of the answers listed

Question 21

All of the following should be done in the process of removing a broken bolt, EXCEPT:

A) inspecting the site of the broken bolt.
B) trying to remove the bolt with a pair of locking pliers.
C) using a screw or bolt extractor.
D) using a self-tapping screw to drill out the old fastener

Question 22

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?

A) Technician A
B) Technician B
C) Both A and B
D) Neither A nor B

Question 23

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

A) Housing
B) Engine block
C) Cylinder head
D) All of the above

Question 24

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.

A) Piston
B) Center punch
C) Both A and B
D) Neither A nor B

Question 25

If the threads of a fastener are not too badly damaged, such as when the outer thread is slightly damaged from being started crooked (cross-threaded), then a _________.

A) Thread file can be used to clean them up
B) New bolt or nut will need to be installed
C) Both A and B
D) Neither A nor B

Question 26

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?

A) Technician A
B) Technician B
C) Both A and B
D) Neither A nor B

Question 27

All of the following are ways to avoid breaking a bolt when removing it except:
​

A) using penetrating oil with bolts that are rusted or corroded in place.
B) applying maximum force in both directions.
C) first checking whether it is a left-hand bolt.
D) as a last resort, you may heat up the bolt that is rusted or corroded in place.

Question 28

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?

A) Tech A
B) Tech B
C) Both A and B
D) Neither A nor B

Question 29

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?

A) Tech A
B) Tech B
C) Both A and B
D) Neither A nor B

Question 30

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?

A) Tech A
B) Tech B
C) Both A and B
D) Neither A nor B

Question 31

________ are designed to secure parts that are under various tension and sheer stresses.

A) Threaded fasteners
B) RTV sealants
C) Chemical welds
D) None of the answers listed

Question 32

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.

A) Nut
B) Screw
C) Bolt
D) None of the answers listed

Question 33

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

A) Threads per centimeter
B) Threads per inch
C) Threads per millimeter
D) Threads per foot

Question 34

Technician A states that when using a torque angle gauge, you should place it over the head of the bolt, and then put the torque wrench on top of the gauge and zero it, if necessary. Technician B states that if a component requires multiple bolts or fasteners, make sure to tighten them all to the same torque angle in the sequence that is specified by the manufacturer. Who is correct?

A) Technician A
B) Technician B
C) Both A and B
D) Neither A nor B

Question 35

_____ are designed to provide a consistent clamping force when torqued to their yield point or just beyond.

A) Torque wrenches
B) Fasteners
C) TTY bolts
D) Both A and B

Question 36

Which of these are threaded fasteners?
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A) C-clips
B) Trim screws
C) Cotter pins
D) Solid rivets

Question 37

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

A) Torque angle
B) Torque limit
C) Torque gauge
D) Torque elasticity

Question 38

Two technicians are discussing bolt sizes. Tech A says that the diameter of a bolt is measured across the flats on the head. Tech B says that the length of a bolt is measured from the top of the head to the bottom of the bolt. Who is correct?

A) Tech A
B) Tech B
C) Both A and B
D) Neither A nor B

Question 39

Which nut is made with a deformed top thread?

A) Lock nut
B) J nut
C) Castle nut
D) Specialty nut

Question 40

A bolt has 3 hash marks on its head. What is its grade?

A) 2
B) 5
C) 6
D) 8