Airframe

Question 1

What method is used to prepare plywood for bending

Answer 1

Soak in hot water then placed in a form until completely dry

Question 2

What are the results of using insufficient gluing pressure when making a wood joint

Answer 2

Thick glue lines

Question 3

Why does the strength of the scarf joint depend upon the accuracy of the two beveled surfaces

Answer 3

In accurate bevel will reduce the amount of affective glue area

Question 4

What type of patches preferred for repair of stressed plywood skin and why

Answer 4

Scarf patch. The edges are scarfed to a 12 to 1 slope instead of a 5 to 1 slope

Question 5

Are mineral streaks acceptable in aircraft wood

Answer 5

Yes as long as there’s no decay

Question 6

What area of the wood spar may not be spliced

Answer 6

Wing attachment fittings, landing gear fittings, engine mount fittings, or lift-and-interplane fittings

Question 7

What type of joint is generally used in splicing structural members in aircraft

Answer 7

A scarf joint

Question 8

What is compression wood and why is it not acceptable for aircraft structures

Answer 8

Characterized by high specific gravity and has the appearance of an excessive growth of Summer wood. Defect is difficult to recognize and is very detrimental to strength

Question 9

What determines the required quality and strength of fabric that is to be used for covering aircraft

Answer 9

By the pounds per square foot of wing loading in the never exceed air speed of the aircraft

Question 10

When are anti-tear strips recommended and where are they used

Answer 10

Installed over ribs, longerons, and stringers but are under the reinforcing tape before the fabric is installed. recommended for all areas in the slipstream

Question 11

What should be the strength of the fabric used for re-covering an aircraft

Answer 11

High-grade aircraft textile material

Question 12

What is the purpose and location of drain grommets in aircraft fabric

Answer 12

Allow the condensed moisture to leave the aircraft as well as furnish ventilation located on the underside of airfoils

Question 13

What type of machine so seems are used an aircraft covering

Answer 13

Plain overlap seams, folded fell seams, and trench fell seems

Question 14

What should be done with the structures that will come into contact with doped fabric

Answer 14

Protective coating such as aluminum foil, dope proof paint, or cellulose tape

Question 15

What is the standard tie off knot used during rib stitching

Answer 15

Modified Seine knot

Question 16

What do you call the edge of cloth tape or webbing that has been proven to prevent raveling

Answer 16

Selvage edge

Question 17

Name two organic and two synthetic types

Answer 17

Organic fibers are cotton and linen. The Synthetic fibers include fiberglass and heat shrinkable synthetic fibers such as nylon and Dacron

Question 18

When covering aircraft where is surface tape used

Answer 18

Sewed seems, lapped edges and all stitching is covered with surface tape

Question 19

When is finishing tape applied

Answer 19

After the second coat of dope is dry and the nap has been sanded away

Question 20

What is the recommended type of repair for an L-shaped tear when the legs are more than 14 inches long

Answer 20

A dope on patch as long as the never exceed velocity is less than 150 mph

Question 21

What primer is used when the maximum protection of the metal is desired

Answer 21

Epoxy

Question 22

What is the purpose of using fungicidal dope on finishing aircraft fabric

Answer 22

To prevent microbiological deterioration

Question 23

What are two types of dope used for aircraft finishes

Answer 23

Nitrate and butyrate

Question 24

What would happen if dope was ever used over paint or enamel

Answer 24

Lift and remove such materials

Question 25

What is applied to metallic surfaces as a common resistance covering before the application of enamel or lacquer

Answer 25

Zinc chromate primer

Question 26

What can be done to the surface of components to prevent filiform corrosion

Answer 26

Ensure the primer is completely cured

Question 27

What are the most common methods of applying aircraft finishes

Answer 27

Dipping brushing or spraying

Question 28

What is used to thin chromate primer

Answer 28

Toluene

Question 29

Which federal regulation prescribes the size and location requirements for aircraft identification numbers

Answer 29

Far part 45

Question 30

What type of materials should be thoroughly protected when using paint remover

Answer 30

Synthetic rubber surfaces, aircraft tires, fabric, and acrylics