DIVISION 06: Woods

Question 1

The classification of wood which comes from conifers (evergreens) which have needles instead of leaves.

e.g. PINE

Answer 1

Softwoods

Question 2

The classification of wood which comes from the broad-leaved or deciduous trees.

e.g. Timber

Answer 2

Hardwoods

Question 3

The layer of wood which lies between the cambium and the heartwood. It is more permeable, less durable and usually lighter in color than the heartwood.

Answer 3

Sapwood

Question 4

It is the older, harder central portion of a tree. It is denser, less permeable and more durable than the surrounding layer.

Answer 4

Heartwood

Question 5

The property of wood which is measured by the compression which a piece of timber undergoes when a weight is applied to it.

Answer 5

Hardness

Question 6

The property of wood which pertains to the amount of piece will bend before breaking.

Answer 6

Flexibility

Question 7

Caused by the attack of fungi.

Answer 7

Decay

Question 8

Cracks or lengthwise separation across the annual rings of growth caused by irregular shrinkage during drying.

Answer 8

Checks

Question 9

Cracks between and parallel to the to the annual rings of the growth.

Answer 9

Shakes

Question 10

Irregular growth in the body of a tree which interrupt the smooth curve of the grain.

Answer 10

Knots

Question 11

These are well-defined openings between annual rings containing solid and liquid pitch

Answer 11

Pitch pockets

Question 12

The lock of wood on the edge of the corner of a piece.

Answer 12

Wane

Question 13

Wood defect which is caused by unequal shrinkage of the board.

Answer 13

Warping

Question 14

It refers to lumber cut tangent to the annual rings or growth or in commercial practice, cut with annual rings at an angle of 0° to 45°; preferable when pleasing pattern is required, as in wall paneling.

Answer 14

Plainsawing

Question 15

It refers to wood cut radially to the annual rings of growth parallel to the rays or, in commercial practice, cut with the annual rings at an angle of 45° to 90°; desirable because it has less shrinkage.

Answer 15

Quartersawing

Question 16

Wood used in construction.

Answer 16

Lumber

Question 17

Lumber less than 2” thick and less than 8” wide.

Answer 17

Strips

Question 18

Lumber less than 2” thick and at least 8” wide.

Answer 18

Board Lumber

Question 19

Lumber more than 2” thick and less than 5” in any dimension.

Answer 19

Dimension Lumber

Question 20

Lumber pieces 5” or more on the smallest dimension.

Answer 20

Timbers

Question 21

It is the size of the lumber when it is cut from the log.

Answer 21

Nominal Size

Question 22

The process of removing moisture from greenwood is called _________.

Answer 22

Seasoning

Question 23

A process of “seasoning” in which the lumber is exposed to the air.

Answer 23

Air-drying

Question 24

A process of “seasoning” in which warm moist air or superheated steam is used to heat the wood and drive out moisture.

Answer 24

Kiln-drying

Question 25

It is used to forestall attack by decay, fungi, harmful insects and marine marine borers in woods.

Answer 25

Wood preservatives

Question 26

An oil-type wood preservative made from distilling coal tar; it is highly toxicity to wood-destroying organisms; strong in odor, cannot be painted, easily ignited during when first applied.

Answer 26

Coal-tar creosotes

Question 27

It gives protection against decay, insects and fire; can be painted; has no objectionable odor; cannot be used in contact with the ground or water.

Answer 27

Chromated zinc chloride | Water-borne wood preservative

Question 28

Water-borne wood preservatives which are dissolved in water for pressure treating, producing a product that is clean and odorless. Undergoes a chemical process known as "fixation".

Answer 28

Chromated Copper Arsenate (CCA) | Ammoniacal Copper Arsenate (ACA)

Question 29

A method of applying wood preservative which consists in placing the wood in cylinders into which the preservative is pumped under pressure.

Answer 29

Pressure treatment

Question 30

A method of applying wood preservative which consists first in placing the wood in a bath of hot and cold preservative for an hour or more.

Answer 30

Hot and cold bath method

Question 31

Are those products made from a mixture of wood and other materials.

Answer 31

Wood composites

Question 32

The most common wood composite. Made of several thin plies, or veneers of wood glued together.

Answer 32

Plywood

Question 33

Plywood thickness for double wall partitions and ceilings

Answer 33

3/16" thk (4.5mm) | 1/4" thk (6mm)

Question 34

Plywood thickness for drawers and shelves.

Answer 34

3/8" thk (10mm) 1/2" thk (12mm) 3/4" thk (19mm)

Question 35

Plywood thickness for cabinets, closet doors, and sub floors.

Answer 35

1" thk (25mm)

Question 36

Types of Plywood:

Answer 36

Ordinary Plywood Form Plywood Marine Plywood Fancy Plywood

Question 37

This is a paneling material made by reducing and refining wood chips into small, thread-like fibers, and then pressing them under heat in hydraulic pressure into dense, smooth, and very rigid panels; Cheaper option than plywood.

Answer 37

Hardboard 4' x 8' (1220mmX2440mm) 1/8" (3mm); 3/16' (4.5mm); 1/4" (6mm) Plain, textured, perforated surface

Question 38

Type of hardboard which is flexible and easy to bend. Only suitable for interior use and where it is not subject to moisture.

Answer 38

Standard hardboard

Question 39

Type of hardboard which is somewhat denser than the standard but not as dense as tempered.

Answer 39

Panel hardboard

Question 40

Type of hardboard which is the densest type, made by impregnating standard board with tempering compound of oils and resins and baking it polymerize the tempering materials; ideal for external use.

Answer 40

Tempered hardboard

Question 41

Brand names of Hardboard:

Answer 41

LAWANIT standard and tempered boards - Philippine Wallboard Corp. LAWANEX panel boards - Philippine Wallboard Corp. MASONITE standard, panel and tempered hardboard

Question 42

Made by bonding together wood particles with an adhesive under heat and pressure to form a rigid board with a relatively smooth surface, often faced with veneer.

Answer 42

Chipboard 2'x4' (600mmX1220mm) , 4'x4' (1220mmX1220mm) , 4'x8' (1220mmX2440mm) 1/4" thk (6mm) to 1" thk (25mm)

Question 43

chipboard which is widely used for self-assembly furniture, work surfaces, wall linings and partitions.

Answer 43

Veneered Chipboard

Question 44

chipboard used as a basis for the carcasses of kitchen furniture, worktops, and flooring.

Answer 44

High-density chipboard

Question 45

Finishing materials made from vegetable fibers such as corn and sugarcane stalks pressed into sheets; not very strong but has good insulating properties; it is usually used for ceiling only.

Answer 45

Fiberboard 4'x8' (1220mmX2440mm) 3/16" thk (4.5mm); 1/4" thk (6mm); 1/2" thk (12mm); 3/4" thk (19mm)

Question 46

Is manufactured from wood, straw, bagasse pulp pressed into boards with or without holes or slots.

Answer 46

Acoustic fiber board | 1/2" - 2" thk (12mm to 50mm) in 1/2" (12mm) increments

Question 47

Brand names of fiber boards:

Answer 47

CELOTEX, CANEX, HOMASOTE, PHILTEX, BONOTEX

Question 48

Non-combustible building board with a gypsum core enclosed in tougfh, smooth paper. It is designed to be without addition of plaster for walls, ceilings or partitions; "dry wall construction"-where plaster is eliminated.

Answer 48

Gypsum board

Question 49

Brand names for Gypsum board:

Answer 49

BORAL distributed by Riviera Home Improvements Inc. | ELEPHANT by A.V.D Marketing

Question 50

Type of gypsum board used to save space; used as a base in a multi-ply construction of self-supporting (studless) gypsum walls.

Answer 50

Coreboard

Question 51

Gypsum board for use in fire-rated assemblies.

Answer 51

Type-X Gypsum board

Question 52

This type of gypsum board used in fire protection and bracing of exterior frame walls.

Answer 52

Gypsum Sheathing

Question 53

This type of gypsum board used as a permanent form in the castling of gypsum concrete roof decks.

Answer 53

Gypsum formboard

Question 54

This board is comprised of 72% portland cement, 20% mineralized cellulose fibers derived from recycled materials, and 8% calcium carbonate.

Answer 54

Fiber-cement board

Question 55

Board made of small wood chips and base materials including cotton stalk, rice straw, bagasse, conventional wood chips and sawdust that have been pressed and glued together.

Answer 55

Particle board

Question 56

Consist of finished lumber which is further cut and processed at a lumber mill. It includes doors, windows, mouldings, trim and other ornamental forms of wood.

Answer 56

Millwork

Question 57

How to purchase lumber from a hardware

Answer 57

Even numbers in feet

Question 58

Shortest lumber length in the market

Answer 58

8'

Question 59

For lumbers, which is not available in the market

Answer 59

1"x1"x12'

Question 60

``` Which is not a substrate for plastic laminates? MDF Chipboard Gypsum Plywood ```

Answer 60

Gypsum

Question 61

``` Which has no melamine form? MDF Plywood Compact board Hardboard ```

Answer 61

Hardboard

Question 62

Estimate number of plywood boards for a 3m X 6m ceiling

Answer 62

7

Question 63

``` Which is not a commercial thickness of plywood? 3/8 5/8 3/16 1/2 ```

Answer 63

5/8"

Question 64

``` Which commercial material is applicable for exterior walls? 3/4" MDF 1" Plywood 1/2" Gypsum board 1 5/8" Float glass ```

Answer 64

1" Plywood

Question 65

``` A vendor for termite protection Termicide Mapecon Pestiway Termacons ```

Answer 65

Mapecon

Question 66

``` What is the best material to create a v-joint? Particle board Hardiflex Plywood MDF ```

Answer 66

Plywood