問題一覧
1
What must be done prior to covering an aircraft in fabric?
1. Inspect a/c structure for damage 2. Ensure wood structure is protected with approved wood varnish 3. Ensure metal structure is protected with approved metal primers 4. Ensure wood and metal structures are dope protected (dope proof)
2
4 types of tapes used are ?
1. finishing tape 2. anti chaffing tape 3. inter rib bracing 4. reinforcement type
3
What will cause damage to primers and finishes? Ex. Damage includes penetrating, wrinkling, lift or dissolve
nitrate / butyrate dope
4
You DO NOT need to protect wood or metal structure prior to attaching fabric ?
false
5
What is finishing tape?
provides weather protection over rib lacing, screws, clips
6
Finishing tape is installed after the fabric is stretched?
true
7
What is “anti-chaffing” tape?
tape over sharp edges to protect fabric wear
8
What is inter rib bracing?
Holds ribs in place prior to fabric
9
What is reinforcement tape?
provides strength to fabric for fasteners
10
What direction should seams be sewn in?
parallel to line of flight
11
What can cause stall stop on leading edges?
thick seams
12
What type of stitch is this?
baseball stitch
13
What type of seam is this?
folded fell
14
What type of seam is this?
plain overlap
15
What type of stich is this?
plain over throw
16
What type of seam is this?
French fell
17
How can you shrink “SYNTHETIC cloth” fabric?
iron on gentle / low heat
18
How can fabric be attached?
1. self tapping 2. blind rivets 3. wire clips 4. stitching
19
Prior to performing rib stiching, what tape should be applied?
reinforcement tape
20
How can you shrink natural cloth?
water
21
Where should the 1st stitch be located when performing rib stiching?
1/2” from leading edges
22
What are three types of rib stiching?
1. single loop 2. double loop 3. blind
23
Grommets are small rings installed to drain moisture. They are located in the lowest points of the plane?
true
24
What are inspection rings used for?
reinforce fabric & inspection
25
Nitrate / butyrate are two approved doping materials?
true
26
Rejuvenators can be used on “good and bad” fabric to restore the fabric to its original condition ?
false
27
Doping materials are flammable. They should be used in well ventilated area with proper fire protection
true
28
How can cracks be repaired in doping material ?
1. seal 2. replace fabric 3. remove and reapply Finnish
29
What percentage of fabric strength must be maintained when performing a fabric test?
70%
30
Rejuvenators can be applied by spraying or brushing on?
true
31
___ is a spiral crack in the paint ?
ring worm
32
How can fabric be tested ?
breaking strength test
33
How often should fabric be tested?
100 hours
34
When performing a strength breaking test, where should the fabric be removed from?
high exposed areas
35
How wide does the strip need to be to perform a breaking strength test?
1”
36
On a seyboth mechanic fabric strength tester, which of the following would indicate good strength on the scale?
green
37
On a seyboth mechanic fabric strength tester, which of the following would indicate strong strength ?
yellow
38
On a seyboth mechanic fabric strength tester. Which of the following would indicate weak strength on the scale?
red
39
When performing a breaking strength test, the measurement is taking from the WEIGHT when the fabric breaks?
true
40
What type of scale does a maule mechanic fabric strength test use to indicate fabric strength?
calibrated scale
41
Maule tester. If the fabric breaks before reaching acceptable range you must?
replace fabric
42
A patch crossing 1 rib is considered a major repair?
false
43
A seyboth mechanical fabric strength tester uses what kind of scale?
colour coded
44
If fabric is torn and requires to be repaired, what type of stiching can be used?
baseball
45
A dope on patch requires only dope and fabric. No other fasteners or sewing required?
true
46
Nitrate dope material can be applied over butyrate dope material
false
47
Butyrate dope material can be applied over nitrate dope material?
true
48
What additive will prevent UV rays from entering and weakening fabric?
aluminum paste
49
What are thinners used for?
reduce viscosity of paint or dope
50
Before using an iron to shrink synthetic fabric you must calibrate it?
true
51
What dope is preferred, nitrate or butyrate ?
butyrate 1. will burn slower 2. greater taunting action to fabric
52
Where is nitrate dope used?
Often used as first and second coats prior to applying Butytrate
53
What must be done prior to shrinking synthetic cloth?
Calibrate the iron
54
What are retarders used for ?
1. Slow drying solvent 2. Used in high humidity 3. Prevents blushing and creates a glossy finish
55
Where is fungicidal paste required?
1. Cotton and linen cloth subject to mildew 2. Added to the first coat of dope
56
Two ways to test fabric strength
1. breaking strength test 2. mechanical test
57
What is considered a major fabric repair?
If a patch crosses 2 ribs it is considered a major repair
58
What type of patch should be used for damage that CANNOT be closed by sewing?
sewn in patch
59
What can cause damage to fabric?
1.sunlight (UV rays) 2. moisture
60
What protective coatings can be used to protect wood surfaces from dope?
1. Aluminum Foil 2. Celllulose Tape 3. Dope Proof Paint
61
What metals do not require dope proofing?
1. Clad aluminum 2. Stainless steel
62
What damage will nitrite and butyrate dope cause?
1. Nitrite is very flammable Dissolve primers 2. Cause wrinkles