6.3.3

Question 1

Before covering a component with fabric what must be done?

Answer 1

It must be inspected, cleaned, protective treatment applied

Question 2

What are the most suitable conditions for application of fabrics?

Answer 2

Room temperature of 16-21C and humidity of 70%

Question 3

What are aircraft fabrics woven from?

Answer 3

Spun threads or yarns

Question 4

What is Cotten tape referred as?

Answer 4

Egyptian tape

Question 5

Where is cotton tape mostly used?

Answer 5

Areas of chafing or protection against stringing cords

Question 6

What material is used for stringing?

Answer 6

Flax cordage

Question 7

How should all materials used for fabric coverings be stored?

Answer 7

In a dry clean area away from direct sunlight at a temperature of 20C

Question 8

When serious chafing is going to occur what can be used for protection?

Answer 8

A canvas or leather patch

Question 9

How could seams never be made on fabric covering?

Answer 9

At a right angle to the direction of airflow

Question 10

What are the two types of machined seams?

Answer 10

Ballon seam and lap seam

Question 11

What is the balloon seam also known as?

Answer 11

The french fell

Question 12

When should the ballon seam be used?

Answer 12

Always unless stated otherwise

Question 13

After the seam is completed how should it be examined?

Answer 13

By a string electric light

Question 14

When should the lap seam be used?

Answer 14

When specified by the manufacturer

Question 15

What type of stitching is used for repairs?

Answer 15

Herring-bone stitch and boot stitch

Question 16

What is the overhand stitch also known as?

Answer 16

Trailing edge stitch

Question 17

What is the overhand stitch used for?

Answer 17

When a sudden change of section occurs (Trailing edges, wing tips, wing root ends)

Question 18

If a thread for hand sewing has not been pre-waxed what should you do?

Answer 18

Give it a coating of beeswax

Question 19

Where is dope generally used?

Answer 19

Attaching fabric to plywood

Question 20

How many coats of tautening dope should be applied before fabric is applied?

Answer 20

Two

Question 21

Where are drainage holes located?

Answer 21

Lower surface of components or moisture entrapment areas

Question 22

What are the two types of eyelets (grommets)?

Answer 22

Drainage eyelets and shielded eyelets

Question 23

Why is it important for access to be provided at specified positions in all fabric coverings?

Answer 23

For inspection or servicing purposes

Question 24

What are the three types of inspection panels on fabric aircraft?

Answer 24

• woods frame
• zip panels
• spring panels

Question 25

What is a woods frame?

Answer 25

When a doped celluloid sheet is placed onto a inspection hole cut out

Question 26

What is the disadvantage of a woods frame?

Answer 26

A new patch has to reapplied every time

Question 27

What is a zip panel?

Answer 27

When an inspection panel is in the shape of a vee has two zips on the sides

Question 28

What is the spring panel?

Answer 28

An inspection panel that has a light alloy reversible dish for easy removal and refit

Question 29

How is dope removed from a fabric?

Answer 29

By using thinners

Question 30

What is the herringbone stitch also known as?

Answer 30

Ladder or baseball stitch

Question 31

When should the herringbone stitch be used?

Answer 31

When the repair is in a straight line

Question 32

Once the herringbone stitch is complete what should you do?

Answer 32

Place a 1inch wide serrated tape over it and then place a fabric patch on top

Question 33

What type of wood is used in woods frame?

Answer 33

2mm plywood

Question 34

If damage to a fabric is more than 4inches what is used?

Answer 34

An insertion repair patch

Question 35

What thread is used for a boot stitch?

Answer 35

A single well waxed number 18 linen thread

Question 36

What are the two portable types of fabric testers?

Answer 36

Seyboth and maule

Question 37

Which portable fabric tester will break the surface of the fabric?

Answer 37

The seyboth tester

Question 38

How should the fabric from a seyboth tester be repaired?

Answer 38

With a 50-75mm patch

Question 39

Why should fabric testers not be done on double layer fabrics?

Answer 39

It will not give you an accurate measurement

Question 40

How does a bursting strength test work?

Answer 40

Force is applied to a steel ball which is in contact with the fabric and the resulting force needed to break the fabric is the answer

Question 41

How many test samples are sent to fabric laboratory tests?

Answer 41

Six warp and six weft