Brainscape's Knowledge GenomeTM


Top Flashcards (Certified)
All Flashcards

Cert 2 Mechanical Engineering > MEA109 Part B > Flashcards

MEA109 Part B Flashcards

(50 cards)

Start Studying
1
Q

Ensure the hardware is approved…

A

Ensure the hardware is approved by the manufacturer of aircraft/engine/components

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

Hardware is manufactured to a…

A

Hardware is manufactured to a specified standard of quality to meet airworthiness requirements

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

‘…’ aircraft parts …

A

“Standard” aircraft parts are those items that are manufactured to specifications.

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

Class 1

A

Loose fit (easily turned with fingers)/ A commercial wing nut

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

Class 2

A

Free fit (screws)/ Most screws

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

Class 3

A

Medium fit (bolts)/ Aircraft bolts

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

Class 4

A

Close fit (requires a wrench to turn nut)/ Requires a spanner to turn the nut onto the bolt thread

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

Threads designated by:

A

Diameter, Number of threads per inch, Thread series, Class.

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

Bolt

A

A threaded fastener that can withstand shear loads or tension loads or both.

Three Main Parts:

  • Head
  • Thread
  • Grip (unthreaded portion).
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

AN
NAS
MS

A
  • AN – Air Force Navy
  • NAS – National Aircraft Standard
  • MS – Military Standard
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

Bolt Fit

A

Required “bolt stress” achieved by correct fit of bolt in the bolt hole and torque applied

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

Types of bolt fits

A

Loose fit, Push fit, Tight-drive fit, Interference fit

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

In the AN bolt hardware code:

A

Diameter is given in 16th of an inch

Heads Been drilled

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

What determines grip length

A

Material thickness determines grip length

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

Add plain washers to adjust …

A

Add plain washers to adjust grip length

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

How many threads are allowed in the bolt hole or allowed to contact the nut?

A

None

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

What is the minimum number of washers allowed under the bolt head and under the nut?

A

A minimum of one

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

Unless otherwise specified, the torque values given in MD are for …

A

clean dry threads

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

Preload on fastener threads determines

A

Strength of joints

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

Incorrect preload may result in

A

Failure of assembled parts

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

Hex – Head Bolt (AN3 – AN20)

Study These Flashcards
A
  • Suitable for tensile and shear applications
  • Made of nickel steel, 2024 aluminium alloy, corrosion
    resistant steel and titanium
  • Cadmium plated steel bolts
    Head marked with asterisk or cross
22
Q

drilled Head Bolt (AN73 – AN81)

Study These Flashcards
A
  • Head drilled in multiple directions to receive safety wire
  • Interchangeable with standard hex head bolts
  • Head marked with asterisk * or cross +
23
Q

Close Tolerance Bolt

Study These Flashcards
A
  • Un-plated shank, apply grease on shank prior to
    installation
  • Cannot be substituted by standard AN hex head bolts.
24
Q

Clevis Bolt

Study These Flashcards
A
  • Head slotted to receive a flat screwdriver
  • Most have drilled shank
  • Relatively long grip length with short threads
25
Eye Bolt
- external tension load applications - Cadmium plated alloy steel material - Threaded end may or may not be drilled.
26
Aircraft Nuts
- Internally threaded component, providing a clamping action in bolted joints - Available as non-self locking or self- locking nuts - Made from cadmium plated carbon steel, stainless steel, or anodized 2024T
27
Non – Self Locking Nuts (AN310 & AN320)
- Castellations (slots) in nut accommodate a cotter pin to the secure bolt -
28
AN310
Thick nut , withstands large tensile loads, also | known as a castle nut
29
AN320
Thin nut, used only in shear load applications, | also known as a castellated shear nut.
30
Plain Nut
AN310 - Thick nut, for tension and shear applications - requires external locking feature e.g. check nut or spring lock washer
31
Check nut
AN316 - Thin nut used to lock AN315 plain nut - Available in left and right hand thread configurations.
32
Self Locking Nuts
- Design integrates a locking device - Two types - nylon and metal - Do not use on parts subject to rotation
33
Self Locking Nuts – Elastic Stop (Nyloc)
- Locking action provided by an unthreaded nylon insert | - Not suitable in above 250 °F applications
34
Self Locking Nuts – Metal Lock Nuts
- Suitable in above 250 °F applications - Bolt’s end must protrude through the nut and 1 to 3 threads exposed to be in safety
35
Shakeproof Lock Washer
- Known also as an internal or external star washers - Used with bolts whenever the self locking or castellated type nut is not applicable
36
Taper Pin
- Designed to take shear loads and prevent any loose motion or play -Two Types: Threaded, Plain
37
Roll Pin
A roll pin is a mechanical fastener that secures the position of two or more parts of a machine relative to each other
38
Aircraft Screws: Classifications and (4) types
Structural screws, Machine screws, Self-tapping screws. | Torx, Slotted, Phillips, Allen
39
Structural Screws
- Heat treated steel alloy - Same shear strength as a bolt of the same diameter - Structural screws have an unthreaded portion (grip), same as a bolt.
40
Machine Screws
- No defined grip –threaded full length - Manufactured from: Low carbon steel, Brass, Corrosion - resistant steel, Aluminium alloy
41
Self – Tapping Screws
- “Type A” has a pointed end - “Type B” has a blunt end - Machine self-tapping screws: Roundhead, Countersunk
42
Rivets
- The most common method of fastening sheet metal | - Solid shank rivets (used in sheet metal), blind rivets
43
1100 Rivet
Dimple markings on rivet head
44
2017& 2024 Rivets
- 2024 rivet is stronger and harder than 2017 rivet
45
Keep 2017 and 2024 rivets refrigerated until ready to be driven.
- Ice Box Rivets | - Refrigeration slows hardening process
46
Mild Steel Rivet
- Use with corrosion resistant steel parts - Designated with “F” in rivet code - No markings on a flat rivet head.
47
Blind Rivet
- Access available to only one end of rivet when driven - Limited space for bucking bar - Mechanical lock, self plugging rivet.
48
Self – Plugging (Friction Lock) Rivet
Not suitable in vibration prone areas.
49
Self – Plugging (Mechanical Lock) Rivet
Consists of 3 parts: • Rivet head with a hollow shank • Mechanical lock • Steel stem - Suitable for vibration prone areas
50
CamlocTM Fastener
To lock – turn stud clockwise quarter turn | To unlock - turn stud counter- clockwise quarter turn

Cert 2 Mechanical Engineering (2 decks)

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