M6 DODI Flashcards
1
Q
when the core bonded between two thin- face sheets, it provides a rigid, lightweight component.
◦
A
SANDWICH CONSTRUCTION
2
Q
- they are measured materials which cross rectangularly with warp threads and filling threads.
A
Fabrics
3
Q
Rule of Thumb for selecting the rivet size is to choose a rivet -
A
DIAMETER IS. ATLEAST 3 TIMES THE THICKNESS OF THE THINNEST SHEET BEING JOINED.
4
Q
diamond cone
A
Rockwell tester
5
Q
- Determined the glare Grade
A
THE NUMBER OF PREPEG LAYERS AND THEIR ORIENTATION
6
Q
Blind rivet is same as solid rivets
A
yes
7
Q
The ratio stress to strain within the proportional limit of a material in tension of compression
A
Modulus of Elasticity
8
Q
After cooling the resin sets and hardens in a given form. Hardening is reversible
A
THERMOPLASTIC
9
Q
- wetting with acidic fluid or mordants
A
HYDROGEN EMBRITTLEMENT
10
Q
These are used with drilled-shank hex-head bolts, clevis bolts, eye bolts or rivets and is designed to lock cotter pin or wirelocking.
A
Non-Self Locking Nuts
11
Q
- separation of plies occurs in multi laminate material
A
DELAMANATION
12
Q
occurs between two materials that come into contact. The metals may be similar or dissimilar or in some cases one of the parts may be nonmetallic.
A
Crevice Corrosion
13
Q
The thickness of the clad layers
A
3-5%
14
Q
- When screwed into a hole of the correct diameter they form their own thread. The Screw head may be slotted or cross recessed.
A
Self-Tapping Screw
15
Q
After solution annealing process, have to be stored at
A
-18 degrees Celcius (stored up to 7 days)
- 20 degrees Celcius (stored up to 20 days)
16
Q
Basic Temper Designation “O”
A
Annealed
17
Q
Basic Temper Designation “W”
A
Solution Annealed
18
Q
7XXX (Wrought Alloys)
A
Zinc
19
Q
RAISED CROSS on their head
A
5056 MAGNESIUM (B)
20
Q
- identified TWO RAISED DASHES in their heads and they are called icebox rivets.
A
2024 ALUMINIUM ALLOY
21
Q
- Ad rivets are identified by a small dimple in the centre of their head.
A
2117 ALUMINIUM ALLOY (AD)
22
Q
- Rigid body in which the constituent particles are arranged in repeating pattern.
A
CRYSTAL
23
Q
- applicable for steel components, which are hardened and have to be softened for mechanical processing
A
SOFT ANNEALING
24
Q
made from small strands of molten silica glass and than spun together and woven into cloth.
A
Fiberglass
25
Customer Wire Number
9000-9999
26
DD-rivets are made of heat-treated aluminium alloy and they are so called
icebox rivets
27
Can only be welded under inert gas/vacuum
Titanium and Titanium alloys
28
will be connected by special contacts who provide a complete shielding through the connector and minimize the danger of wrong connection of the four wires.
Quadrax Cables
29
one of the most common methods today is to crimp these elements onto a wire by means of a special crimping tool. This procedure is also called
Cold weldings
30
The material is heated to a specified temperature and held there for a specified time.
Solution annealing
31
Wire commonly used in the A/C and is cheap
Copper
32
used to measure temperature
Two different metal alloy soldered or welded together in which electrical potential is created when the wiring contact is heated which is proportional to the temperature
thermocouple
33
The maximum stress that can be applied to a material without permanent deformation of the materials
YIELD STRENGTH
34
the ratio of stress to strain within the proportional limit of a material in tension or compression
Modules of elasticity
35
Not woven and made out of cut or non cut, multidirectional laying fiber.
Mats
36
Wire numbers on the wires, the first four digit number designates
ATA-Chapter
37
Bonding process of honeycomb
Corrugation & Expansion process
38
Corrosion that is a combination of stress and corrosion
Stress corrosion
39
Identified by its characteristics worm-like trace of corrosion products beneath the point film.
Filiform Corrosion
40
Result in the rubbing movement between two heavily loaded surfaces and can eventually cause cracking
fatigue.
Fretting Corrosion
41
Damage classification in composite
Allowable, Repairable, Non-Repairable
42
Pins includes grooves onto which a collar is swaged
Lockbolts
43
Surface wetting
The smaller the contact angle the more liquid spreads over the surface, and vice versa
44
Solid rivet is formed by deformation of two shank
Upset head
45
Thread has a greater lead that a fine pitch thread of the same major diameter
Screw which has a deeper thread cut into its surface will have a fewer threads
Coarse pitch
46
Corrosion on aluminum and magnesium. White, powder deposit, Starts on the surface of a material and then extends vertically into the material
Ans. Pitting Corrosion
47
A piece of hexagonal metal bar, drilled and tapped through its axial center-line
Ans. Stud box
48
A piece of rod, threaded at each end with a plain portion in the middle
Ans. Stud
49
A load that is uniformly distributed over a certain area and also the force per unit of area expressed is
PSI (pounds per square inch)
Ans. Unit stress or stress
50
The maximum stress that can be applied to a material without permanent deformation
Ans. Yield strength
51
When the stress on the area is a combination of tensile, compressive, shearing, twisting
Ans. Combined Stress
52
What doesnt belong to Cast Aluminum Alloy
have a grain structure that is very coarse, thus the metal is not brittle
53
Characterized by its YELLOW COLOR, lightweight and its excellent tensile strength.
Ans. Aramid
54
Small surface damage use as scratch, nicks, or corrosion, cause a change pf stress distribution of the component, risk to crackling would be the result
Notch sensitivity
55
If the stud is broken level with or below the surface
Ans. Ezi-out
56
7X19 first number of stranded, second number of wire
Part number- Black color on the insulator
Wire number- Green
57
How do you remove a broken stud with a sufficient stud protuding
Ans. Filed flat
58
The stress at which a material in tension, compression, or shear will rupture.
Ultimate Strength
59
Blind rivet reason fastening has been developed, which deform its back when a_________load applied at the front
Tension
60
Ability of a material that enables it to withstand force over a period of time
Durability
61
occurs when low alloyed steels are deformed chipless in the cold state.
Cold Shortness Sensitivity
62
Rivet grip length
1/16
63
Rivet diameter
1/32
64
Damage classification?
Allowable ,Repairable ,Non repairable
65
A deformity caused by extraneous forces, which are applied to the structure
Depression or Dent
66
identify the diameter of MS20292881D5-8
5/32
67
Identify the diameter of rivet BAC1527D5-12
5/32
68
It can be the starting point for intergranular corrosion?
Pitting corrosion
69
D-rivets are identified by raised dot in the centre of their head.
2017 Aluminium Alloy (D)
70
Occurs due to the tendency of most metals to return to their natural.
Corrosion
71
Reaction of two different types of molecules when reactive groups are brought together.
Polyaddition
72
Hardening of the material at room temperature?
natural aging
73
Low-cost reinforcing material?
Fiberglass
74
Sheets made of alloys are with a thin layer of pure aluminium on both sides as a means of corrosion protection
CLAD
75
a flush rivet with a very small flush head and the head of the rivet is slightly arced and has a special head mark.
Shear head rivet
76
Since heat is used as curing agent, these resins may tend to run off of any vertical or near vertical surface before they have a chance to cure.
"They run like water."
Thixotropic Agents
77
Which material is cladded with pure aluminum for corrosion resistance?
Aluminium alloy
78
these inserts are manufactures from round wire which is converted into diamond shape
Heli-coil Inerts
79
Finer version of the whitworth thread form and the smaller thread provides a finer form of adjustment and greater resistance to vibration in all fastening devices
British Standard Fine (BSF)
80
It deforms its back when a tension load is applied at the front?
Blind rivet
