Wood (Week 4)

Question 1

The reference species as a standard of tree wood is _______ _______

Answer 1

Sitka Spruce

Question 2

Aircraft wood must be _____ dried

Answer 2

Kiln

Question 3

The wood’s Specific Gravity must be Greater than ______

Answer 3

0.36

Question 4

The slope of the grain must not be steeper than __ in ___

Answer 4

1 in 15

Question 5

Must be ________ ___________ (Vertical Grain)

Answer 5

Quarter Sawed

Question 6

What kind of cut is this?

Answer 6

Quarter Sawed

Question 7

Grains of Laminated wood must run __________ to eachother

Answer 7

Parallel

Question 8

The best kind of wood for Spars is __________ wood

Answer 8

Laminated

Question 9

___________ is constructed from veneors that are hot bonded together

Answer 9

Plywood

Question 10

Grains of Veneers on Plywood run at ____ degree angles to eachother

Answer 10

90

Question 11

Wet Wood is susceptable to ______, this usually occurs at 20% moisture and up

Answer 11

Fungi

Question 12

Splits often occur ________ ______ _________

Answer 12

along grain lines

Question 13

Wood shrinkage is greatest in a

Answer 13

tangential direction (parallel to growth rings)

Question 14

what are the types of wood construction?

Answer 14

• solid wood
• laminated wood
• plywood

Question 15

what is the minimum number of annular ring per inch?

Answer 15

6

Question 16

2 or more layers of solid wood bonded togerther is called what?

Answer 16

Laminated wood

Question 17

Constructed by bonding thin sheets of wood together called veneers

Answer 17

Plywood

Question 18

This is the useable life of the glue from the time it is mixed until the time it must be used.

Answer 18

Pot life

Question 19

the allowable time between the application of the glue and the time the joint is assembled. (once you put the glue one)

Answer 19

open assembly time

Question 20

the allowable length of time between assembly of the joint and the application of clamping pressure.

Answer 20

closed assembly time

Question 21

the period of time during which the parts are being pressed together.

Answer 21

pressing time

Question 22

Ideal moisture content of wood

Answer 22

10-12%

Question 23

For fungus to grow, the moisture content would normally have to be greater than?

Answer 23

20%

Question 24

Acceptable Moisture is ___ - ___ %

Answer 24

8-16

Question 25

Drain Holes size:

Answer 25

1/4”

Question 26

______ ________ is the most satisfactory way of making an end joint between 2 solid wood members

Answer 26

Scarf Joint