Deck 7: Hardware, Fasteners, Drills, and Thread Repair

Question 1

1)Rolled screw threads are larger than the shank of the bolt (the area between the thread and the head of the bolt).

Answer 1

True

Question 2

10)____ are used to make or enlarge holes in metal and to help remove broken fasteners.

A) Pop rivets
B) Pipe threads
C) Drill bits
D) Pliers

Answer 2

C

Question 3

19)When a screw thread is stripped, a better repair is to use a(n) ____________________ to preserve the original thread size.

Answer 3

thread insert

Question 4

17)____________________ washers are hard on the surface only; the core of the washer is soft and will compress, allowing the connection to lose clamping force.

Question 5

16)A(n) ____________________ is an externally threaded fastener that is used with a nut.

Question 6

3)An antiseize compound is used where a bolt might become difficult to remove after a period of time.

Question 7

11)While discussing drill bits, Technician A says that a drill bit that is sharpened "off center" will drill a hole that is too small. Technician B says that it will drill a hole that is too large. Who is correct?

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

Question 8

15)All of the following are types of retaining rings EXCEPT:

A) spiral types.
B) snap rings.
C) pop rivets.
D) lock rings.

Question 9

13)All of the following statements are true EXCEPT:

A) Drills sized by number commonly range from 80 (0.0135") to 1, which is 0.228" (almost 1/4").
B) The most widely used number-sized drills usually are numbers 1 to 60 (0.040").
C) Commonly used metric drills range from 0.20 mm to 21.00 mm in size.
D) A micrometer or a special drill gauge with holes of the specified size can also be used to determine the size of a drill bit.

Question 10

5)A tap drill usually provides about 15% of a full thread.

Question 11

2)To anneal metal, it is heated to a specific temperature and then quenched.

Question 12

6)While having a discussion about fasteners, Technician A says that to anneal a metal, it is heated to a specific temperature and then quenched. Technician B says that to anneal a metal, it is heated and allowed to cool slowly. Who is correct?

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

Question 13

7)Studs are MOST-Likely to be found on:

A) carburetor mounts.
B) fuel injection systems.
C) spark plugs.
D) sheet metal parts.

Question 14

18)A(n) ____________________ is used to cut internal threads in a previously drilled hole or to chase (clean) existing threads.

Question 15

8)A bolt becomes fatigued from working back and forth when it is too loose. The problem is MOST-Likely to occur when the assembly is not properly:

A) torqued.
B) crossed threaded.
C) drilled.
D) annealed.

Question 16

9)Torsion breaks are LEAST-Likely to be caused by:

A) the use of a poor grade of fastener.
B) an improper thread fit.
C) too much friction.
D) improper assembly procedures.

Question 17

20)____________________ are used in some applications to prevent a pin, such as a piston pin, from sliding out of position.

Question 18

12)Which of the following is LEAST-Likely to be the HS drill speed when drilling mild steel?

A) 300 rpm for 1/2"
B) 750 rpm for 1/2"
C) 1,000 rpm for 3/8"
D) 1,500 rpm for 1/4"

Question 19

4)Every 0.001" of bolt relaxation will cause a loss of about 30,000 psi of clamping force.

Question 20

14)____ are used to make external threads on a round rod.

A) Pop rivets
B) Dies
C) Lock rings
D) Pliers

Question 21

21)Provide definitions for the following terms: tensile strength, yield point, and ultimate strength.

Question 22

23)How would you remove a broken bolt that has not bottomed out and a bolt that has broken off above the surface?

Question 23

24)How would you remove a broken fastener with a fluted extractor set?

Question 24

22)Briefly discuss three types of taps that are available for any thread size.

Question 25

25)What are the steps involved in the Heli-Coil repair method?