Deck 14: Fasteners

Question 1

A bolt is a fastener that is a steel rod with threads at both ends.

Answer 1

False

Question 2

This thread form is used primarily to transmit power.

A)knuckle thread
B)buttress thread
C) ISO metric thread
D) worm thread

Answer 2

D

Question 3

Pitch is the distance from one point on a thread to the corresponding point on the adjacent thread as measured perpendicular to its axis.

Answer 3

False

Question 4

Rivets are permanent fasteners, usually used to hold sheet metal together.

Question 5

If you have a 1/4 - 20 UNC threaded screw and rotate it ten full turns, the end will travel 1/2".

Question 6

The minimum full thread length for a screw or stud in aluminum is:

A)equal to 1.5 times the diameter
B)equal to the diameter
C) equal to 2 times the diameter
D) equal to .5 times the diameter

Question 7

A right-hand thread rotates in a counterclockwise direction.

Question 8

Taps are used to cut external threads; dies are used to cut internal threads.

Question 9

A nut that is tightened onto a left-hand thread must be turned to the right.

Question 10

A 5115 series retaining ring would be recommended to provide rigid end play take-up.

Question 11

A screw is a threaded fastener that does not use a nut and is screwed directly into a part.

Question 12

The housing diameter for an internal series N5000-25 ring is:

A).688
B).453
C) .250
D) .875

Question 13

Spring pins are slightly larger in diameter than the hole into which they are inserted.

Question 14

The depth of a thread is figured by measuring the distance between the crest and the root of the thread, as measured at a right angle to the axis.

Question 15

The free diameter of an external 5100-775 retaining ring is 7.243.

Question 16

Speed of rotation and the actual load applied on the lifter determines the type of follower to be used.

Question 17

This type of retaining ring does not require any grooves and is used mainly as a positioning and locking device.

A)beveled ring
B)bowed ring
C) ring for radial assembly
D) self-locking ring

Question 18

The most important design criterion for a retaining ring is:

A)the ability to do the job
B)cost of installation
C) the permanence of the ring itself
D) whether or not a groove is required

Question 19

The American Standard thread was adopted in 1864 in the United States.

Question 20

Lead is the distance a screw thread advances axially in one full turn.

Question 21

A screw that is 3" long, 3/8" in diameter, coarse, right-hand threads, average fit, and rounded-head style is called out by:

A)3/8 X 15 UNC - RDH cap screw X 3.0 LG
B)RDH cap screw - 15 UNC x 3/8 x 3.0 LG
C) 3/8 - 15 UNC - 2A x 3.0 LG RDH cap screw
D) 3" long round head, cap screw (3/8" diameter, coarse)

Question 22

A thread having 15 threads per inch has a pitch of:

A).15
B)1.5
C) 10.5
D) 15

Question 23

The advantage of multiple threads is:

A)power
B)speed
C) stress
D) both a and b

Question 24

Which of the following is not a correct diameter size for a cap screw?

A).230
B).850
C) .460
D) .320

Question 25

Which of the following is not a correct diameter size for a machine screw?

A).721
B).034
C) .018
D) .080

Question 26

Which statement is not true of a series 5115 self-locking ring?

A)is used for flat contact surfaces
B)withstands heavy thrust loads
C) should not be used with ungrooved shafts
D) has arched rim for extra strength

Question 27

This type of grooved fastener is widely used as a T handle on valves and tools.

A)Type B
B)Type D
C) Type E
D) Type U

Question 28

This type of rivet is not as strong as the other types.

A)countersunk head
B)pan head
C) flat head
D) truss head

Question 29

Which of the following is not one of the five standard head forms of cap screws?

A)flat head
B)oval head
C) round head
D) fillister head

Question 30

The minimum full thread length for a screw or stud in brass is:

A)equal to .5 times the diameter
B)equal to the diameter
C) equal to 2 times the diameter
D) equal to 1.5 times the diameter

Question 31

What does 5/8 - 11 UNC - 2A X 2 1/2 LG mean?

A)5/8" long, right-handed thread, average fit
B)5/8" nominal size, 11 TPL, Unified National Series-Coarse, average fit, external thread, 2 1/2" long
C) 5/8" diameter, 11" long, coarse series
D) 11 fit, coarse X 2 1/2" long X 5/8" diameter

Question 32

This type of grooved fastener is recommended for us as a stop pin.

A)Type A3
B)Type D
C) Type U
D) Type C

Question 33

This thread form is used for airplane propeller hubs.

A)knuckle thread
B)buttress thread
C) square thread
D) worm thread

Question 34

This thread form is used in electric light bulbs.

A)knuckle thread
B)buttress thread
C) acme thread
D) worm thread

Question 35

Which of the following is one of the basic systems of representing threads?

A)standard internal system
B)simplified system
C) standard external system
D) both a and c

Question 36

Retaining rings are commonly used on:

A)threaded rods
B)internal bearings
C) worm gears
D) shafts

Question 37

Which of the following is not one of the major kinds of keys used in industry today?

A)square key
B)flat key
C) gib head key
D) button head key

Question 38

What is not a factor to be considered before selecting any type of retaining ring, other than load capacity?

A)lug size
B)adequate clearance
C) the cost of installing the ring
D) whether or not a groove is required

Question 39

What is the recommended hole size for a .312" (8) diameter spring pin?

A)min .312, max .318
B)min .321, max .328
C) min .322, max .325
D) min .315, max .318

Question 40

Which of the following is not one of the four applications of threads?

A)to fasten parts together
B)for fine adjustments between parts
C) for gross measurements
D) to transmit motion or power