Which of the following materials is commonly used for making electrical insulators?

• Copper

• Plastic

• Aluminium

• Steel

What is the primary advantage of using composite materials in manufacturing?

• Low cost

• High strength-to-weight ratio

• Easy to recycle

• High electrical conductivity

Which manufacturing process involves shaping metal by heating it and then hammering it into shape?

• Casting

• Forging

• Extrusion

• Injection moulding

What is the main characteristic of thermosetting plastics?

• They can be remoulded multiple times

• They soften when heated

• They harden permanently after being heated once

• They are biodegradable

Which of the following is a non-ferrous metal?

• Iron

• Steel

• Aluminium

• Cast iron

What is the purpose of annealing in metalworking?

• To harden the metal

• To make the metal more brittle

• To soften the metal and relieve internal stresses

• To coat the metal with a protective layer

Which material is known for its excellent thermal conductivity?

• Wood

• Plastic

• Copper

• Rubber

What is the main advantage of using Computer Numerical Control (CNC) machines in manufacturing?

• Lower initial cost

• Increased manual labour

• High precision and repeatability

• Limited to simple shapes

Which of the following is a characteristic of high carbon steel?

• High ductility

• High hardness

• Low tensile strength

• High electrical conductivity

What is the primary use of a lathe machine in manufacturing?

• Cutting flat surfaces

• Drilling holes

• Shaping cylindrical objects

• Welding metal parts