Unit 9.4 AQA Alevel DT Metal Finishes Quiz

What are the two main reasons finishes are applied to metals?

• To increase weight and reduce cost

• To enhance appearance and prevent corrosion

• To improve conductivity and flexibility

• To decrease hardness and increase temperature resistance

What happens to ferrous metals over time?

• They become more flexible

• They rust

• They become non-magnetic

• They melt

Why do some non-ferrous metals and alloys not protect well against corrosion?

• They are too heavy

• They do not form a strong oxide layer

• They are too expensive

• They conduct electricity poorly

What is the function of cathodic protection in metal finishes?

• To enhance appearance

• To prevent rusting

• To increase hardness

• To improve flexibility

What must be done to a workpiece before applying paint?

• It must be heated

• It must be frozen

• It must be prepared and degreased

• It must be painted without preparation

Why are car bodies often finished with cellulose paint?

• It is cheaper

• It dries much faster due to the solvent

• It is more colorful

• It is easier to remove

What do cellulose paints contain that is damaging to the Ozone layer and Human health?

• Water

• VOCs

• Metals

• Plastics

What are the characteristics of acrylic paints?

• Water-based, durable, and hard-wearing

• Oil-based, fragile, and quick-drying

• Solvent-based, non-durable, and soft

• Water-based, non-durable, and quick-drying

What is usually required for acrylic paints to cure?

• Sunlight and air

• Heat, professional equipment, and up to 24 hours

• Cold temperatures and darkness

• Immediate exposure to water

What is the purpose of electroplating?

• To increase the weight of the object

• To provide a protective layer with increased aesthetic appeal

• To make the object magnetic

• To change the color of the object