Manufactured Sheet and Panel Products

Question 1

plywood has an even number of layers. true or false

Answer 1

false

Question 2

what type of plywood is used for construction applications

Answer 2

structural exterior plywood

Question 3

describe the process of making custom millwork/cabinet plywood

Answer 3

custome millwork/cabinet plywood is plywood made in house by bonding high-quality matched veneers to cores. full sheets of manufactured sheet product may be pressed or smaller pieces of core can be cut and then bonded with veneer

Question 4

list two benefits of alternating the grain when manufacturing plywood

Answer 4

a) minimize the amount of shrinkage or swelling

b) add strength

Question 5

how is a sheet of plywood designed in order to minimize dimensional movement?

Answer 5

typically the grain direction and thickness of the veneers is balanced across the thickness of the plywood

Question 6

what are the core types use in plywood

Answer 6

composites, veneers or a combination of both

Question 7

describe the outside piles used in plywood

Answer 7

the face and back plies are the outside faces of a sheet. it is best that they are the same thickness and species but the may not be of the same quality depending on whether the sheet is visible on both sides. face plies are of higher quality veneer than back plies

Question 8

how are softwood veneers typicall cut for the production of construction plywood

Answer 8

veneers for construction plywood are tupicall rotary-cut softwood

Question 9

what are the advantages and disadvantages of using an engineered wood core in plywood construction?

Answer 9

engineered wood core tupically costs less and is flatter but weights more than a softwood veneer core

Question 10

how do the expansion characteristics of plywood (along the face grain and across the face grain) compare to the expansion characteristics of solid wood?

Answer 10

expansion in plywood of balanced construction is slightly agreater along the grain but much less across the grain thanfor solid wood`

Question 11

what is the mimimum number of layers found in lumber core plywood

Answer 11

5

Question 12

describe combination core plywood

Answer 12

this type of plywood useses a combination of composites and veneers for plies

Question 13

describe the combination core plywood

Answer 13

american markes are not applicable and shoudl be ignored only canadian markings apply

Question 14

can plywood displaying only an american grading stamp be used in canada

Answer 14

no, american markes are not applicable and should be ignmored only canadian markings apply

Question 15

does plywood bend more sharply perpendicular or parallel to the face grain

Answer 15

plywood can be bent more sharply when the bend is perpendicular to the direction of the face grain

Question 16

list three benefits that vcomposite panels have over solid wood

Answer 16

a) composite panels produce uniform density with a smooth surface
b) panels produce thickness tolerances with a smooth surface
c) panels provide a solid base that is free of knots, voids and grain

Question 17

three benefits that composite panels have over solid wood

Answer 17

bendable sheets are designed for structures that require curves. the two most common types are kerfed core and flexible plywood.

Question 18

what advantages does flexible plywood have over kerf core?

Answer 18

tigher radius is possible with thin sheets of flexible plylaminated together than with kerfed material. flexible plywood also has the ability to be formed in two directions, such as compond S shapes. flexible plywood is more suitable for areas of high use or impact and no substructure is required

Question 19

describe overlays and common types available

Answer 19

overlays are materials that are bonded over a core of material. overlays include plastic laminates, veneers, vinyl films, medium-density overlays and thin metal sheets

Question 20

describe overlays and the common types available

Answer 20

peel coat

Question 21

for what is post-forming laminate designed?

Answer 21

it is designed for thermoforming to irregular shapes

Question 22

why are backer and regrind laminate used?

Answer 22

as inexpensive back faces of panels that are not visible

Question 23

what is the overlay called that is very thin melamine-impregnated paper fused to a substrate?

Answer 23

low-pressure laminate (melamine)

Question 24

list common uses of solid plastics

Answer 24

A) waterproof insulation
b) protyping
c) furniture parts
d) shelves
e) counter and table tops
f) shatterproof glass for doors, windows, cabinet glass and security partititions

Question 25

what advantages does lexan have over plexiblas

Answer 25

lexan has more impact resistance and does not yellow with UV exposure

Question 26

what type of core materials is used when lightweight construction is required such as in the recreational vehicle aeronautical and marine industries

Answer 26

honeycomb sheets

Question 27

four things to consider in the use of manufactured sheet products

Answer 27

a) dimensional stability from changes in moisture content b) balanced construction to minimize warping c) application ofor which the panel will be used d) handling and storage

Question 28

how does moisture content in sheet goods change as compared to the humidity of the ambient air?

Answer 28

change in moisture content is much slower than changes in relative humidity in the ambient air

Question 29

how do overlays contribute to dimensional stability?

Answer 29

overlays like veneer and plastic and coatings vary in their ability to reduce moisture transfusion when applied properly all increase panel stabiltty and reduce warping

Question 30

what is meant by the term balanced construction?

Answer 30

both sides of the panel are treated identically in order to maintain balance and minimize warping. whatever is done to one side of the panel is done to the other.

Question 31

what is used to keep material flat and act as a barrier to moisture movement?

Answer 31

a cover sheet

Question 32

when applying overlays with adhesive what must you remember in order to maintain panel balance?

Answer 32

apply an equal quantity and type of adhesive to both faces in order to balance the humidity absorbed from the glue is important for the overlays to have the same moisutre content

Question 33

what role does concurrent timing have when coatings or overlays are applied to manufactured sheet goods?

Answer 33

simultaneous treatment of both faces of a panel minimizes warping., warping is minimized when a panel is overlaid sanded or coated as concurrently as possible.

Question 34

what product alternatives do you have if you have clients with environment sensitivity?

Answer 34

composites plywood anbd overlays that minimize off gassing and improve air quality.

Question 35

what can be done to reduce the formaldehyde emissions from a composite panel?

Answer 35

properly applied laminates or coatings can reduce emission levels by 95% or more. barriers are most effective when all surfaces are treated

Question 36

how should sheet goods be handled in order to minimize damage to finished surfaces?

Answer 36

sheets should not be slid off a stack. it is best to lift sheets to avoid scratching.

Question 37

why should sheet products not be stored directly on concrete?

Answer 37

sheets stored on concrete are susceptible to moisure absorption.

Question 38

what types of panels are made with cellulose based fibre and adhesive? what are the two primary types of material used?

Answer 38

composite cores for panels are made from cellulose based fibre and adhesive. these materials are by-products of swamills (wood fibre) and agriculture (agrifibre)

Question 39

two methods used to produce particle board products?

Answer 39

a) mat pressing b) extruding

Question 40

how can sheets of particle board be produced with different layers?

Answer 40

made up of layers of mats that are consolidated and hot pressed into a finished sheet. mats allow manufactures to choose the particle size and the amount of adhesive used in each layer of a sheet.

Question 41

three common grades of particleboard used in cabinetmaking?

Answer 41

a) high density b) medium density c) low density

Question 42

fireboard is consolidated into sheets by what process

Answer 42

interfelting (interlocking) of fibres and the use of pressure rather than resins conslidate and hold the panels together.

Question 43

what type of kibreboard is cold pressed and for what is it used?

Answer 43

low-density fibreboard is cold pressed and is used for projects requiring a light weight and sound deadening.

Question 44

two main attributes of medium-density particleboard.

Answer 44

suitable for painted projects sharp clean surfaces are produced when cutting and shaping.

Question 45

what three grades of hardboard is availalbe?

Answer 45

a) standard b) service c) tempered

Question 46

five special use products are hardboard manufactured?

Answer 46

a) underlayment b) perforated c) acoustical d) embossed patterns e) speciality etched patterns

Question 47

two main applications of OSB.

Answer 47

a) inexpensive substitute for plywood b) core material in composite plywood

Question 48

what characteristic does OSB have that is the same as plywood?

Answer 48

OSB has a strength axis along its length as does plywood.

Question 49

minimum number of layers in plywood? describe the layers.

Answer 49

plywood consists of three or more layers which are called plies. minimum plywood has two outside face plies of hardood or softwood veneer and at least one core ply consisting of a sheet of veneer or a layer of composite panel.