What is the primary purpose of the rolling process in metal deformation?

• To increase the metal's temperature

• To reduce the thickness of the metal

• To change the metal's colour

• To increase the metal's weight

Which of the following is a characteristic of hot rolling?

• It is performed at room temperature

• It results in a rough surface finish

• It increases the metal's hardness

• It is used for precision applications

Cold rolling is typically used to:

• Increase the metal's ductility

• Improve the metal's surface finish

• Reduce the metal's weight

• Increase the metal's temperature

Which of the following is NOT a benefit of cold rolling?

• Improved surface finish

• Increased strength

• Reduced ductility

• Increased grain size

What is the main difference between direct and indirect extrusion?

• The direction of the metal flow

• The temperature at which the process is performed

• The type of metal used

• The speed of the process

In direct extrusion, the metal billet moves:

• In the opposite direction to the ram

• In the same direction as the ram

• Perpendicular to the ram

• Does not move at all

Indirect extrusion is also known as:

• Forward extrusion

• Backward extrusion

• Lateral extrusion

• Horizontal extrusion

Which of the following is a disadvantage of direct extrusion?

• High friction between the billet and container

• Limited to small-scale production

• Requires high temperatures

• Produces low-quality products

Impact extrusion is most commonly used for:

• Producing long metal rods

• Creating hollow shapes like tubes

• Manufacturing small, intricate parts

• Forming metal sheets

Which of the following metals is most suitable for impact extrusion?

• Steel

• Aluminium

• Copper

• Titanium