Question 1

What is one example of a metal used in electrical conductor applications?

Accepted Answer

Copper

Answer

Polyethylene

Answer

Silica

Answer

Gallium

Question 2

Which type of material is known for being thermally insulating and withstands high temperatures?

Accepted Answer

Ceramics

Answer

Metals

Answer

Polymers

Answer

Composites

Question 3

What key property makes an alloy steel suitable for making automobile chassis?

Accepted Answer

Strengthened by heat treatment

Answer

Lightweight

Answer

Low cost

Answer

High electrical conductivity

Question 4

What are polymers typically known for in terms of their structure?

Accepted Answer

Good electrical and thermal insulators

Answer

Excellent heat resistance

Answer

High electrical conductivity

Answer

High strength

Question 5

What is one application of barium titanate?

Accepted Answer

Capacitors for microelectronics

Answer

Food packaging

Answer

Structural support

Answer

Conductors for electricity

Question 6

What are the five groups used to classify materials as per the text?

Accepted Answer

Metals and Alloys, Ceramics and Glasses, Polymers, Semiconductors, Composites

Answer

Metals, Ceramics, Composites, Foams

Answer

Metals, Ceramics, Plastics, Alloys

Answer

Metals, Glasses, Alloys, Polymers

Question 7

Why is plastic used for the outer casing of an electric connector?

Accepted Answer

It is a good electrical insulator and prevents electric shock.

Answer

It has high-temperature resistance.

Answer

It is a strong conductor of electricity.

Answer

It is the most expensive material available.

Question 8

What category do materials like silicon and gallium arsenide belong to?

Accepted Answer

Semiconductors

Answer

Metals and Alloys

Answer

Composites

Answer

Ceramics

Question 9

What is a characteristic property of ceramics mentioned in the text?

Accepted Answer

Strong and hard but very brittle.

Answer

Lightweight and simple to manufacture.

Answer

Good electrical conductors.

Answer

High flexibility and ductility.

Question 10

Which processing technique involves heating a metal to change its properties?

Accepted Answer

Heat treatment

Answer

Cold working

Answer

Extrusion

Answer

Casting

Question 11

What type of crystal structure does iron take at room temperature?

Accepted Answer

Body Centered Cubic (BCC)

Answer

Amorphous

Answer

Face Centered Cubic (FCC)

Answer

Hexagonal Close-Packed (HCP)

Question 12

What happens to brass when exposed to a marine environment?

Accepted Answer

Dezincification occurs, weakening the brass.

Answer

It becomes stronger.

Answer

It turns into gold.

Answer

It remains unchanged.

Question 13

What is a feature of advanced ceramics?

Accepted Answer

They can be used in various high-tech applications such as electronic devices.

Answer

They have poor durability.

Answer

They are mainly used for traditional crafts.

Answer

They are typically low-cost and simple to create.

Question 14

What is the primary advantage of composites as discussed in the text?

Accepted Answer

They blend properties of different materials to achieve desired characteristics.

Answer

They are always more expensive than other materials.

Answer

They are heavier than traditional materials.

Answer

They are made from a single type of material.

Question 15

What is the significance of nano-technology in materials science?

Accepted Answer

It involves the manipulation and development of materials at the nanometer scale.

Answer

It emphasizes the study of liquids only.

Answer

It focuses only on large-scale structures.

Answer

It has no current applications.

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