TIMBERS

Question 1

properties of ash

Answer 1

positives
-durable
-lightweight
-hardwood
-grain: medium to coarse texture
-finishes well and is good to work with

negatives
-cause skin irritation
-decrease lung function
-not resistant to insects attacks

Question 2

Mahogany

Answer 2

positives
-durable
-less likely to warp
-good water resistant properties
-highly resistant to wear and tear
- stains and polishes well

negatives
-heavy and dense wood

Question 3

Pine

Answer 3

-inexpensive compared to other wood types
-medium, medium- coarse grain
-little and medium durability against fungi and insects
-easy to work with

Question 4

redwood

Answer 4

-grain straight with a coarse texture
-light pinkish colour
-moderately durable to decay
-mid to upper range price
-insect resistant

Question 5

MDF

Answer 5

-dense
-durable
-cost effective
-resistant against insects

Question 6

plywood

Answer 6

-high strength
-impact resistant
-flexible
-moisture resistant

Question 7

what is wood splitting

Answer 7

this occurs when the wood loses too much moisture. it is a unavoidable defect. can be resolved by removing the split ends

Question 8

what is knots

Answer 8

this happens when a tree’s branch dies off and its base becomes enclosed by a second layer of wood. knots can give an interesting visual appearance

Question 9

Dry rot

Answer 9

dry rot happens when there is too much moisture in the timber. best way to treat it is to completely replaces it

Question 10

wood worm

Answer 10

occurs when moisture in an timber is at a good level in which female adult beetles uses to lay eggs. once the eggs hatches the larva eats away the timber =, creating holes.

Question 11

uses of ash

Answer 11

making handles of oars, rackets, hockey sticks and also used for flooring

Question 12

uses for redwoood

Answer 12

boxes
bats
barns
bridges
railway sleeper cars

Question 13

uses of Mahogany

Answer 13

furniture
cabinets
floors
musical instruments
doors

Question 14

uses of plywood

Answer 14

furniture
flooring
roofing
structural applications

Question 15

MDF

Answer 15

soundproofing
flooring
furniture
vapour repulsion

Question 16

uses for pine

Answer 16

toys
poles
sleepers
landscaping
furniture
paneling

Question 17

and disadvantages of natural seasoning

Answer 17

advantages
-cheap
-timber are stronger than kiln

disadvantages
-slow
-damages from insects

Question 18

kiln seasoning

Answer 18

Advantages
-protects wood form warping
-faster
-accurate
-kills bugs and fungus

Disadvantages
-expensive
-not readily available

Question 19

what is seasoning

Answer 19

process of removing the majority of moisture from a wood

Question 20

name the stock forms

Answer 20

-rough sawn
-Planed square edge
-natural timber
-manufacture board
-mouldings