EP

Question 1

Wht is a rechargeable battery called?

Answer 1

Nickel cadmium

Question 2

Wht is the most basic battery called ?

Answer 2

Zinc carbon

Question 3

Wht is a potentiometer?

Answer 3

Variable resistor

Question 4

Wht is non polar?

Answer 4

It is when a component doesn’t have a positive or negative and can be connected any way round

Question 5

Properties of acrylic (Perspex)

Answer 5

Hard wearing and will not shatter but will crack and scratch easily

Can be machined, drilled and threaded

Question 6

Properties of HIPS (High Impact Polystyrene)

Answer 6

Light, flexible and string plastic

Can be cut, drilled, injection moulded, vacuum formed and blow moulded

Question 7

Properties of ABS (Actylonitrile Butadiene Styrene)

Answer 7

High resistance to impact

Can be cut , drilled , injection moulded, vacuum formed and blow moulded

Question 8

Properties of PVC (Polyvinyl Chloride)

Answer 8

Lightweight, hard wearing plastic

Question 9

Properties of nylon

Answer 9

Tough with good resistance to wear

Self lubricating

Can be machined

Question 10

Where is acrylic used

Answer 10

Sings 
aircraft 
Windows 
Covers for car lights 
Washbasins

Question 11

Where are ABS used ?

Answer 11

Car components
Tool handles
Cases for telephones
Kitchen appliances

Question 12

Where are HIPS used ?

Answer 12

Toys
Boxes
Containers
Cases for electrical goods

Question 13

Where is PVC used ,

Answer 13

Pipes
Guttering
Bottles
Window frames

Question 14

Where is nylon used

Answer 14

Bearings

Gear wheels

Question 15

What is GRP (Glass Reinforced plastic)

Answer 15

Type of thermosetting plastic

It’s a Polyester resin & hardener mixed together and reinforced with fibre glass

Question 16

What is epoxy resin ?

Answer 16

Type of thermosetting plastic

It’s resin and hardener mixed together

Question 17

Where is Glass Reinforced Plastic (GRP) used ?

Answer 17

Canoes
Boats
Car bodies

Question 18

Where is epoxy resin used ?

Answer 18

Castings
PCB
Surface coating
Bonding of other materials

Question 19

Example of softwood

Answer 19

Pine

Question 20

Examples of hardwood

Answer 20

Oak
Mahogany
Beech

Question 21

Examples of manufactured boards

Answer 21

MDF (Medium Density Fibreboard)

Plywood

Question 22

How is MDF made?

Answer 22

By bonding wood fibres with resin based adhesive

Question 23

Elasticity definition

Answer 23

The ability of an object to regain its original shape after being deformed

Question 24

Ductility definition

Answer 24

The ability to be stretched without breaking

Question 25

Malleability definition

Answer 25

The ability to easily be pressed and hammered into shape

Question 26

Hardness definition

Answer 26

Resistance to scratching , cutting and wear

Question 27

Brittleness definition

Answer 27

How likely it is to break without bending

Question 28

Tensile strength

Answer 28

Ability to retain strength when stretched

Question 29

Toughness definition

Answer 29

Resistance to breaking , bending or deforming

Question 30

Typical materials used in injection moulding

Answer 30

Polythene Polystyrene Polypropylene Nylon

Question 31

Common materials used in blow moulding

Answer 31

PVC Polythene Polypropylene

Question 32

Piezo transducer

Answer 32

Produces small voltage when deformed by mechanical movement Common inexpensive transducer made of slice of piezo electric material bonded to brass disc

Question 33

Smart cable

Answer 33

Uses PIEZO ELECTRIC PRINCIPLE to convert mechanical energy into electrical

Question 34

Thermocolour sheet

Answer 34

Made by printing sheet with special type of THERMOCHROMIC LIQUID CRYSTAL tht changed colour when heated Can also be heated by attaching resistance wife to back if sheet and used as heating element when small electric current passed through