AMT 120 REVIEWER

Question 1

Desirable characteristics of Aircraft Wood Structure:

Answer 1

Light weight, Less expensive than metal, Less special tooling required, Long life when properly preserved

Question 2

Based on their cellular structure woods are generally classified into two.

Answer 2

Aircraft Wood

Question 3

____ been early aircraft construction material

Answer 3

Wood

Question 4

Many of lighter aircraft that were produced in 1930s and 40s have made of wood for structural component such as:

Answer 4

Wing spars, Ribs, Control surface, Fuselage

Question 5

comes from evergreen trees that bear cones (fir-cone) and has needles rather than leaves called firs.

Answer 5

Soft wood.

Question 6

It is tough and has good shock-resisting qualities.

Answer 6

Ash

Question 7

it was the primary material used to construct aircraft in the 1930s

Answer 7

Wood

Question 8

The difference in physical properties of various species of wood are due to the ___ and _____

Answer 8

cell size and wall thickness

Question 9

Douglas Fir is a softwood grown in ___ and ____.

Answer 9

Canada and USA

Question 10

is a hardwood, which grows in the mid-west

Answer 10

Ash

Question 11

Wood was the primary material used to construct aircraft in the ____

Answer 11

1930s

Question 12

Sitka Spruce is a softwood, which grows in ___ and the ____ .

Answer 12

Canada and United States of America

Question 13

comes from deciduous broadleaf trees (has broad leaves and classified as deciduous - shedding leaves) e.g. Mahogany

Answer 13

Hard wood

Question 14

Three forms of wood commonly used for a/c use.

Answer 14

Solid wood, Laminated wood, Plywood

Question 15

Ash is a hardwood, which grows in the ____

Answer 15

mid-west

Question 16

Soft wood comes from evergreen trees that bear cones (fir-cone) and has needles rather than leaves called _____.

Answer 16

firs

Question 17

primary material during World War 1

Answer 17

Wood

Question 18

Based on their construction, wood employed for a/c use are classified as (Types of Wood):

Answer 18

Solid wood, Laminated wood, Plywood

Question 19

It is a brownish yellow in color, straight-grained and satiny in appearance

Answer 19

Sitka Spruce

Question 20

The distinction between the two is not based on the hardness of the wood, but the ________ of the wood

Answer 20

cellular structure

Question 21

Plywood is used in the construction of box spars for __, ____, __ and ___, specially for the leading edge of the wing, as well as for flooring and interior cabin paneling.

Answer 21

wings, webs of ribs, wind and fuselage covering

Question 22

Birch is a hardwood and grows in most parts of ____.

Answer 22

Europe

Question 23

an example of hardwood:

Answer 23

Mahogany

Question 24

historically used for telephone poles & railway attachment.

Answer 24

Douglas Fir

Question 25

It has a reddish brown appearance

Answer 25

Mahogany

Question 26

refers to the original wood.

Answer 26

Solid wood

Question 27

Types of wood used in Plane Construction:

Answer 27

Sitka Spruce, Birch, Ash, Douglas Fir

Question 28

Based on their cellular structure woods are generally classified into two (There are two principal types of woods)

Answer 28

Hard Wood, soft wood

Question 29

An example of a soft wood

Answer 29

Sitka-Spruce

Question 30

It has yellow or cream color

Answer 30

Birch

Question 31

It is yellow-white or brown-white, strong and does not split easily.

Answer 31

Birch

Question 32

Often used for aircraft wing spars.

Answer 32

Solid wood

Question 33

Each sheet of thin wood is known as

Answer 33

Veneer

Question 34

used to form a specific shape or size

Answer 34

Laminated wood

Question 35

is a softwood grown in Canada and U.S.A.

Answer 35

Douglas Fir

Question 36

It is yellow-white to yellow-brown in color and is close-grained.

Answer 36

Ash

Question 37

laminated wood used to form a specific shape or size that are used for:

Answer 37

Components that require curved shape like, wing tips, fuselage formers.

Question 38

is a hardwood and grows in most parts of Europe.

Answer 38

Birch

Question 39

most commonly used for aircraft are mad from what wood in a mahogany and birch?

Answer 39

Plywood

Question 40

solid wood refers to the original wood. often used for ____

Answer 40

Aircraft wing spars.

Question 41

Process for laminating wood:

Answer 41

Prepare the laminated, apply glue on the mating surface, clamp the laminates together, wait until the glue sets.

Question 42

Its color varies from reddish yellow to orange brown and it has prominent growth rings.

Answer 42

Douglas Fir

Question 43

is a softwood, which grows in Canada and the United states of America.

Answer 43

Sitka Spruce

Question 44

is used in the construction of box spars for wings, webs of ribs, wing and fuselage covering, specially for the leading of the wing, as well as for flooring and interior cabin paneling.

Answer 44

Plywood

Question 45

is the external cover

Answer 45

Bark

Question 46

is part of the tree which is alive or partially alive and Cambium - still carries sap/liquid.

Answer 46

Sapwood

Question 47

is part of the tree which is dead and does not carry any sap. It supports the tree.

Answer 47

Heartwood

Question 48

concentric layers of wood that can be seen at the end of a tree trunk/stem that has been cut perpendicular to its length.

Answer 48

Annual Rings

Question 49

concentric rings called?

Answer 49

annual rings of alternately light and dark - represents growth

Question 50

formed in the first season of the year, has large cells. Light rings, representing fast growth.

Answer 50

Springwood

Question 51

formed in the later growing season, denser and stronger. Dark rings - Represent slow growth

Answer 51

Summerwood

Question 52

a separation between the annual ring layers.

Answer 52

Shake

Question 53

indicates the direction of the wood fibers relative to the axis of the tree or longitudinal edge of a piece of cut lumber (wood, timber, board, plank).

Answer 53

Grain

Question 54

a wood in which the fibers have been damaged by compression load

Answer 54

compression wood

Question 55

a portion of a branch or a limb/member of a tree which has been incorporated in to the body of the tree (is a deformation of grains caused by the growth of a branch)

Answer 55

Knot

Question 56

a knot resulting from growth of a twig/branch

Answer 56

Pin knot

Question 57

a radial crack that runs across the grain line

Answer 57

Check

Question 58

disintegration of actual wood substance by the action of fungi

Answer 58

decay

Question 59

lengthwise separation of fibers

Answer 59

split

Question 60

a knot that runs through the depth of a beam perpendicular to the annual ring

Answer 60

Spike knot

Question 61

a structural failure in wood caused by the application of too great compressive load

Answer 61

Compression failure

Question 62

terminology of wood:

Answer 62

bark, sapwood, heartwood, annual rings, spring wood, summer wood, shake, grain, compression wood, knot, pin knot, check, decay, split, spike knot, compression failure