Brainscape's Knowledge GenomeTM

Browse over 1 million classes created by top students, professors, publishers, and experts.


See full index

mod 6 > 6.5 > Flashcards

6.5 Flashcards

1
Q

what are the 5 different classes of fit

A

class 1- loose fit
class 2- free fit
class 3- medium fit
class 4- close fit
class 5- tight fit

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

what class of fit are most aircraft screws

A

class 2

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

what class of fit are most aircraft bolts

A

class 3

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

what is the definition of a bolt

A

tightened with a nut

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

what can be used to tell how many threads per inch

A

a thread pitch gauge

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

what is the difference between right and left hand threads

A

right hand threads are cut clockwise and left hand are cut counter clockwise

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

what is the crest of a thread

A

the prominent point of the thread

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

what is the root of a thread

A

the lowest point of the thread

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

what is the flank of a thread

A

the angle from root to crest

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

what is the major diameter of a thread

A

on male thread its crest to crest and on female thread its root to root

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

what is the minor diameter of a thread

A

on a male thread its root to root and on female thread its crest to crest

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

what is the pitch of a thread

A

the distance between 2 of the same point eg crest to crest

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

what is the lead of a thread

A

the distance a screw moves for one complete rotation

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

what are the negatives of using multiple threads

A

less holding power and less force produced when tightened

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

what are the characteristics of British standard whitworth thread forms

A

55° thread angle, coarse thread used for general purposes

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

what are the characteristics of British standard fine thread forms

A

55° thread angle, fine threads mainly used in high vibration areas

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
17
Q

what are the characteristics of british association

A

47.5° thread angle used on very small electrical parts under 1/4 inch diameter

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
18
Q

what are the characteristics of american national thread forms

A

60° thread angle with flat crests and roots

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
19
Q

what are the characteristics of unified thread forms

A

incorporates both american and British features 60° thread angle

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
20
Q

what is the difference between coarse and fine threads

A

coarse threads have a lot more distance between each thread whereas fine has a lot less

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
21
Q

what are the 3 other types of thread profiles

A

square, ACME, buttress

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
22
Q

what is the definition of a screw

A

tightened into a threaded hole

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
23
Q

what is the diameter and length measured in for Airforce Navy

A

length in 1/8 inch and diameter in 1/16 inch

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
24
Q

what does the letter A signify in Airforce Navy

A

the absence of a split pin hole

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
25
Q

what does the letter H signify in Airforce Navy

A

there is holes for wirelocking

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
26
Q

what are the 3 main materials aircraft bolts are available in

A

cadmium plated nickel steel
corrosion resistant steel
2024 aluminium alloy

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
27
Q

Unless specified what material is a bolt made from

A

cadmium plated nickel steel

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
28
Q

What does the letter C signify in a bolt

A

its made from corrosion resistant steel

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
29
Q

what does DD signify in a bolt

A

its made from 2024 aluminium alloy

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
30
Q

what is a clevis bolt used for

A

shear loads

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
31
Q

what is the diameter and length of a clevis bolt measured in

A

both in 1/16 inch

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
32
Q

what is an eye bolt used for

A

tensile loads

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
33
Q

what are the characteristics of a close tolerance bolt

A

ground to a much tighter tolerance and used in areas subject to pounding loads

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
34
Q

what are the characteristics of internal wrenching bolts

A

high strength steel bolts used primarily in areas with high tensile loads

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
35
Q

what must be installed with an internal wrenching bolt when its installed in aluminium structures and why

A

a washer to spread the load so its not concentrated on a small point

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
36
Q

what is the length measured in for NAS precision airframe bolts

A

even numbers are 1/8 inch and odd numbers are 1/16 longer than the even before it

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
37
Q

how is the length of an AN bolt different to the same length of another bolt

A

AN measure overall length and other bolts measure grip length

38
Q

what is the length of an MS bolt measured in

A

1/8 inch is even numbers and odd numbers between can be available when the length is critical

39
Q

what are the measurements for NSA

A

1/16 inch for both length and diameter

40
Q

what are the 2 basic types of nuts

A

self locking and non self locking

41
Q

how does a self locking nut work

A

increases friction within the thread by changing the metallic structure or having nylon at the end

42
Q

when is a low temperature nut used and how does it increase thread friction

A

below 121°C and have nylon to increase friction

43
Q

when is a high temperature nut used and how does it increase thread friction

A

above 121°C and have a change in metallic structure

44
Q

what class of fit is a castle nut and what does the number indicate

A

class 3 fit and number denotes size of bolt that fits

45
Q

what is the main characteristic of a shear castle nut

A

much thinner than a castle nut used for shear loads usually put on clevis bolts

46
Q

what type of bolt is a plain nut used for

A

a bolt that doesn’t have a hole for split pins so has an A

47
Q

what is a check nut used for and what are its characteristics

A

making sure the primary nut cannot turn off and is about half the thickness of the plain nut and rotates in the opposite direction

48
Q

what makes an engine nut unique

A

rounding of the castles

49
Q

when is a wing nut used

A

to remove something without tools

50
Q

what are anchor nuts and when are they used

A

permanently mounted nut plates for areas that cannot be accessed from the back

51
Q

what are tinnerman nuts used for

A

instrument mounts on light aircraft

52
Q

what are rivnuts

A

a rivet that becomes an anchor nut when it is formed

53
Q

what are the 4 types of stud

A

standard, waisted, stepped and shouldered

54
Q

what are the 2 uses for a helicoil insert

A

reinforce thread in soft material to stop stripping and spread the load more, to repair stripped thread

55
Q

what are the 3 basic classifications of screws

A

machine, structual and self tapping

56
Q

when are machine used

A

light structural parts and they are the most widely used

57
Q

what type of screw can be directly substituted with a bolt

A

structural screw

58
Q

what are self tapping screws used for

A

holding thin sheets together

59
Q

what are the 2 types of self tapping screws

A

type A which has a sharp point
type B which has a blunt point and fine threads

60
Q

what is a dowel and when is it used

A

a cylindrical rod used for precision alignment and orientation

61
Q

what are the 3 types of lock washsers

A

spring, tab and shakeproof

62
Q

what does a spring washer do

A

the spring compresses when the nut is tightened increasing friction

63
Q

how does a tab washer work

A

it works by folding one part against a flat of the nut so it cannot turn

64
Q

what does a shakeproof washer do

A

it digs into the nut

65
Q

what are the common sizes of lock wire

A

20, 25, 30 /100 inch /gauge

66
Q

what is the max number of bolts that can be wire locked together

A

3

67
Q

when can the single wire method be used

A

when there is no access and it must be done in a closed geometrical shape

68
Q

what are locking plates secured to

A

an adjacent part to the nut it locks

69
Q

what are the 3 common types of quick release fasteners

A

dzus, airloc and camloc

70
Q

what are quick release fasteners

A

fastened and released in a 1/4 turn

71
Q

what are rivets

A

a fastener put into a pre drilled hole and deformed to join materials together

72
Q

what is the definition of a rivet

A

any type of fastener that obtains clamping action by one end being mechanically upset

73
Q

what type of rivet is AN426 and MS20426

A

a counter sunk head

74
Q

what type of rivet is AN470 and MS20470

A

a universal head rivet

75
Q

what parameters must be met before driving a rivet

A

the rivet must extend the base by 1.5x the original diameter

76
Q

what parameters must be met after driving a rivet

A

the end must have expanded 1.5x the original diameter and must extend the base .5x the original diameter

77
Q

what does each part of the rivet code represent

A

the first part is organisation and head style. the second part is the alloy material. the third part is the diameter in 1/32 inch. the last part is the length in 1/16 inch

78
Q

what is classified as the length of the rivet

A

whatever goes into the hole

79
Q

what is a friction lock rivet

A

a rivet that is only held in by friction of a centre bar

80
Q

what is a mechanical lock rivet

A

a rivet that is held in place through a centre bar that is locked into place

81
Q

how are friction and mechanical lock rivets removed

A

first removing the lock collar by punching the centre stem and then drill it out otherwise it would just spin

82
Q

what are the 3 types of lockbolt used

A

pull type, blind type and stump type

83
Q

how does a high lok bolt work

A

it has a shear collar that comes off when tightened leaving the locking collar behind. it also is drilled through an interference fit hole

84
Q

what is a hi lite

A

works the same as a high lok but is made of lighter materials

85
Q

what is a taper lok

A

the more it gets tightened the more stress it applies on the hole which strengthens the material around it

86
Q

what is a hi-tigue

A

a fastener designed to reduce fatigue by putting radial force around the hole which pre loads it with stress making it less likely to break under fatigue stress

87
Q

what are the characteristics of a square thread

A

very powerful root ideal for power transmission

88
Q

what are the characteristics of a ACME thread

A

easier to cut than a square thread and also considered stronger

89
Q

what are the characteristics of a buttress thread

A

designed to handle heavy forces in one direction

90
Q

what are the 4 common types of key

A

woodruff, square, pratt and whitney key, gib head key

91
Q

what 2 types of key are unable to move once placed in the part

A

woodruff and pratt and whitney

mod 6 (10 decks)

Brainscape helps you reach your goals faster, through stronger study habits.
© 2025 Bold Learning Solutions. Terms and Conditions