C&G 202 Revision

Question 1

1️⃣3️⃣ Why is stainless steel preferred over mild steel for making surgical instruments?

Accepted Answer

It resists corrosion

Question 2

1️⃣4️⃣ A factory uses a material that becomes soft and deformable when heated but hardens when cooled. Which material?

Accepted Answer

Thermoplastic

Question 3

4️⃣ A metal beam in a factory starts to bend under load. What does this tell you about the material’s properties?

Accepted Answer

High Ductility

Question 4

6️⃣ A car engine component needs to withstand high temperatures and resist wear. What type of material is most suitable?

Accepted Answer

Nickel Alloy

Question 5

7️⃣ A window glass shatters into small pieces when broken. What does this tell you about its material structure?

Accepted Answer

It is tempered glass

Question 6

1️⃣5️⃣ A construction worker needs a fire-resistant insulation material. What type of material would be best?

Accepted Answer

Fiberglass

Question 7

1️⃣1️⃣ A manufacturing plant needs gears that are tough but not brittle. What material property should they prioritize?

Accepted Answer

Toughness

Question 8

1️⃣2️⃣ A technician is testing whether a metal part is aluminum or steel. What simple test could they use?

Accepted Answer

Magnetic Test

Question 9

8️⃣ Which material would be best for making a water pipe that resists corrosion and does not contaminate drinking water?

Accepted Answer

Copper

Question 10

🔟 Why are composite materials used in high-performance sports equipment like racing bikes and tennis rackets?

Accepted Answer

They combine strength and lightness

Question 11

9️⃣ A metal structure needs to be welded, but cracking occurs in the heat-affected zone. What property might be lacking?

Accepted Answer

Weldability

Question 12

3️⃣ An aircraft manufacturer wants to reduce fuel consumption by using lighter materials. Which can be a good option?

Accepted Answer

Aluminum

Question 13

2️⃣ A chef’s knife must be sharp, durable, and corrosion-resistant. What metal would be a suitable choice?

Accepted Answer

Stainless Steel

Question 14

1️⃣ A bridge needs to withstand strong winds and heavy loads. Which property is most important in selecting material?

Accepted Answer

Toughness

Question 15

5️⃣ Which type of material is best for making electrical fuses that melt when excessive current flows?

Accepted Answer

Lead

Questions 15