Materials and their Properties module quiz: Singapore N(A)-Level Design and Technology (SEAB 7055) quiz

Red, green and blue woods

Wet, dry and frozen woods

Hardwoods, softwoods and manufactured boards

Heavy, medium and light woods

Softwoods always come from broad-leaved trees

Softwoods cannot be used in furniture

Hardwoods are always softer than softwoods

Hardwoods come from broad-leaved trees and are usually strong and slow-growing

Wood pieces or fibres glued together to make large, stable sheets

A single solid plank cut from a tree

A type of metal sheet

A liquid plastic

It contains no iron

It contains iron and, unless protected, will usually rust

It is always non-magnetic

It is always a plastic

Mild steel

Cast iron

Aluminium

Wrought iron

A pure single metal

A thermosetting plastic

A type of wood

A mixture of metals (or a metal with another element) made to improve properties

Thermoplastics can be reheated and reshaped many times; thermosets set hard permanently

Thermoplastics are always stronger

Thermosets can be reshaped many times

There is no difference

Epoxy resin

Acrylic

Urea formaldehyde

Melamine

It is cheaper to buy

It never wears out

It can be melted and reshaped again, while a thermoset cannot

It is always biodegradable

Pick the cheapest material whatever it is

Choose by colour only

Always use wood

Match the material's properties to the specification, weighing cost, availability and environment

Aluminium, because it is light and resists corrosion outdoors

Mild steel, because it is cheap

MDF, because it is smooth

Acrylic, because it is colourful

Properties have nothing to do with use

The material must have the properties the job needs, or the product will fail

Cheaper materials always work best

Only appearance matters

Cast iron, because it is strong

Pine, because it is cheap

Acrylic, because it is transparent and weatherproof

Mild steel, because it is heavy