Brainscape's Knowledge GenomeTM

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


See full index

M6 > 6.5 > Flashcards

6.5 Flashcards

1
Q

How can you measure screw thread pitch ?

A
  1. Screw thread pitch gauge
    Match thread on gauge to thread on screw/bolt and check if alined
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

Name all 5 classes of fit with threads

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
3
Q

Explain a lock washer ?

A
  1. Used between joint surface and nut
  2. Made of steel
  3. Spring loaded washer which with friction, doesn’t allow vibration to loosen the nut which has been tightened on
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

What are 3 types of lock washer ?

A
  1. spring
  2. tab
  3. shakeproof
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

Explain spring washer ?

A
  1. Fitted beneath nut which compresses the spring creating friction when nut is tightened
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

Explain tab washer ?

A
  1. One of the flat sides is bent against the nut and other bent side is places into hole on surface
  2. Stops vibration loosening bolt
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

Explain shake proof washer ?

A
  1. Spring steel washer
  2. Tendency for nut to unscrew is prevented by the sharpe sides bitting into underside nut
  3. Can be repeatedly used
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

What is the diameter of lock wire measured in ?

A

1/1000 of an inch

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

What happens to end of wire once twisted final time ?

A

End is cut of then wire is bent backwards preventing injury

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

Where is locking wire used ?

A
  1. Used in critical areas where inspection intervals may be in frequent
  2. Areas prone to vibration
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

What’s the two locking wire techniques ?

A
  1. By hand
  2. Locking wire pliers
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

Explain lock plates ?

A
  1. Can be used repeatedly
  2. Secured to adjacent part of structure
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

Where are pal nuts used ?

A

Used where frequent load changes tend to loosen nuts

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

Why is quick release fasteners useful to use on aircraft ?

A
  1. They provide vibration resistant joining solution for panels which will repeatedly need removing and attaching using minimal effort.
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

What is the three common types of quick release fasteners ?

A
  1. Dzus
  2. Airloc
  3. Camloc
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

What are the Two types of dzus fasteners ?

A
  1. Heavy duty
  2. Light duty
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
17
Q

What’s the difference between the heavy duty and light duty Dzus fastener ?

A
  1. Heavy duty fastener has a grommet
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
18
Q

Two types of airloc fasteners ?

A
  1. Fixed type
  2. Floating type
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
19
Q

What does a Airloc fastener consist of ?

A
  1. Stud
  2. Cross pin
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
20
Q

What’s the advantages of a Camloc fastener ?

A
  1. used in confined areas
  2. Vibration resistant
  3. Connects quickly
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
21
Q

What three parts does a quick turn fastener consist of ?

A
  1. Stud (male)
  2. Washer
  3. Receptacle
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
22
Q

What is a pip pin ?

A
  1. Non-threaded fastener allowing rapid installation and removal of parts without tooling
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
23
Q

What two types are a pip pin available in ?

A
  1. Locating pin
  2. Locking pin
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
24
Q

What is a Circlip ?

A
  1. Spring clip used for external and internal locking
  2. Used for retaining seals and bearings
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
25
Q

What is used to remove circlip ?

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

What loads does a taper pin carry ?

A

Shear

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

How is a plain taper pin (AN385) held in place ?

A
  1. Held by friction in reamed hole
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
28
Q

What the difference between the AN385 and AN386 taper pin ?

A
  1. AN386 has its small end threaded
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
29
Q

Why are roll pins used ?

A
  1. To provide locking for a joint where pin in unlikely to be removed
  2. To lock something Onto shaft or handle
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
30
Q

How is a roll pin inserted ?

A

Pin compresses then when pushed into hole springs out holding securing it against edge of hole

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

How do you remove roll pin ?

A

Tap with pin punch

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

What’s the size of a Clevis pin measured in ?

A

1/16 inch increments

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

What’s the purpose of a “key” ?

A
  1. Used to align wheels and disc sprockets and gears onto a shaft
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
34
Q

What’s the 4 types of keys ?

A
  1. Woodruff
  2. Square key
  3. Prat and Whitney
  4. GiB headed
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
35
Q

Whats happens to the cross sectional area of a rivet after it has been driven ?

A

It increases

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

What head type on a rivet is an AN426

A

Countersunk

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

What type of head on a rivet is AN470 ?

A

Universal

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
38
Q

How far shall a rivet extend beyond material prior to being driven ?

A

1.5 x rivet diameter

39
Q

How much does the Bucktail expand from its original diameter after driven ?

A

1.5 x original diameter

40
Q

What two systems of rivets are used today ?

A
  1. Airforce navy
  2. Military standards (MS20)
41
Q

What is the length of a rivet measured in ?

A

1/16 inch

42
Q

What is the diameter of a rivet measured in ?

A

1/32 inch

43
Q

What’s the countersink angle of the head ?

A

100 degrees

44
Q

Why does the universal rivet replace round,flat and brazier rivets ?

A

Has better fatigue strength

45
Q

Once countersunk, how much should a rivet head protrude surface ?

A

0.005-0.007 of an inch ( 5-7 thow)

46
Q

Why does the head of a countersunk rivet protrude surface ?

A

To allow all of the rivet guns energy to be transferred onto the head
( if rivet is flush, it lowers the energy transferred onto the head from gun )

47
Q

How is a pure aluminium rivet identified ?

A

By the letter A in the rivet code as they have no markings on the rivet itself

48
Q

How are 2024 rivets identified ?

A

Two raised dashes on head

49
Q

What are stainless steel rivets used for ?

A

Fastening corrosion resistant steel sheets
( identified by letter F )

50
Q

4 types of mechanical rivets ?

A
  1. Cherry max
  2. Olympic locks
  3. Cherry lock
  4. Huck locks
51
Q

Why Is special fasteners used over ordinary bolts/screws ?

A
  1. As when driven, there shank doesn’t change in dimension
  2. When driven the fastener doesn’t come under tensile
52
Q

How can you remove mechanical lock rivets ?

A

Pin punch through middle then drill rest of shank out

53
Q

Whats the 3 types of lock bolts ?

A
  1. Pull type
  2. Blind type
  3. Stump type
54
Q

With shear lock bolts, is there 1 or 2 grooves to place locking collar onto ?

A

2

55
Q

How is hi-lock bolt installed ?

A

Placing bolt into hole with a shear collar on other end which snaps off at a set torque ?
Ps. Made from strong material

56
Q

Whats different of a hi-lite bolt to hi-lock ?

A

Hi-lite is made from lighter material and shorter thread

57
Q

Whats the strongest special fastener used in aircraft construction ?

A

Taper-lock - because of its cork like shape which holds well on the walls in the hole

58
Q

What force is exerted on area around the installation of a hi-Tigue ?

A

Radial

59
Q

What is the length of a bolt measured In ?

A

1/8 inch

60
Q

What is the diameter of a bolt measured in ?

A

1/16 inch

61
Q

What part of the bolt is its grip length ?

A

Un threaded part of the shank

62
Q

What must be added if the unthreaded part of the bolt extends further than the thickness oof th material ?

A

Washer

63
Q

What is the letter which identifies a corrosion resistant steel bolt ?

A

C

64
Q

What letter identifies a aluminium bolt ?

A

DD

65
Q

What load does clevis bolts hold ?

A

Shear

66
Q

What does the long grip length On a clevis pin increase ?

A

The shear strength.

67
Q

On a part number, what does an A signify ?

A

It signifies that there is no hole on the thread for a pin to go into.

68
Q

Why is the eye at the top of an eye bolt there ?

A

To allow a turnbuckle to be inserted !

69
Q

What is stamped on the head of a close tolerance bolt to show its identification ?

A

A triangle

70
Q

What is the tolerance for a close tolerance bolt ?

A

0.000-0.0005 inch

71
Q

Where is internal wrenching bolts used and made of ?

A

Made from steel and used in areas with high tensile loads

72
Q

Who developed precision airfare bolts ?

A

NAS

73
Q

What loads are eye bolts used for ?

A

External tension loads.

74
Q

What

A
75
Q

Does military standard bolts have even dashed number, true or false ?

A

True

76
Q

What are the 3 classifications of screws ?

A
  1. Machine screws
  2. Structural screws
  3. Self-tapping screws
77
Q

What are machine screws primarily used for ?

A

Attaching fairings and structural panels
( thread runs full length of shank )

78
Q

What class of fit are screws normally ?

A

Class 2 ( free fit )

79
Q

How many degrees is a flat head screws head ?

A

100

80
Q

Whats the two types of nuts ?

A
  1. Self locking
  2. Non self locking
81
Q

Whats the tree types of self locking nuts ?

A

1.Metal - only used when temp reaches above 121 degrees
2.Nylon
3. Fibre

82
Q

Whats the 2 types of self locking nuts ?

A

Metal - only used when temp reaches above 121 degrees
Nylon

83
Q

Can nylon self locking nuts be used on engines ?

A

Yes. Only in locations specified by engine manufacturer !

84
Q

Why is the end of a metal self locking nut smaller in diameter than its body ?

A

As it allows the thread to grip the bolt providing the location methord.

85
Q

When would you use a castle nut ?

A

Under shear and tensile loads

86
Q

Whats the difference between a shear castle nut and ordinary castle nut ?

A

Shear castle nu is shallower and can only take shear loads

87
Q

Whats the 3 common thread standards ?

A
  1. British standard
  2. American national thread form
  3. Unified thread form
88
Q

Whats the 4 British standard thread form ?

A
  1. British standard whitworth (BSW)- has thread angle of 55 degrees.
  2. British standard fine (BSF)
  3. British standard pipe (BSP)
  4. British association (BA)- thread angle of 47.5
89
Q

Whats the two American standard threads ?

A

ANC - American national coarse
ANF - American national coarse fine
( both have thread angle of 60 degrees )

90
Q

Whats the three unified thread forms ?

A

UNC - coarse
UNF - fine
UNEF - extra fine
( All have angle of 60 degrees )`

91
Q

Whats the 3 thread profiles

A
  1. Square thread
  2. Buttress threads
  3. Acme threads
92
Q

What does the letter H signify in a bolts code ?

A

The bolt is used for wire locking.

93
Q

What’s the two classes of self tapping screw ?

A

Class A - sharpe
Class B - blunt

M6 (6 decks)

Brainscape helps you reach your goals faster, through stronger study habits.
© 2024 Bold Learning Solutions. Terms and Conditions