Engineering Materials and Metallurgy Mock Test 3

10%

Question 1 of 10

1. Which ceramic material does Si₃Al₃O₃N₅ denote?

Silicon alumino nitrate

Silicon carbide

Sialon

Silicon nitride

Question 1 of 10

Question 2 of 10

2. What is the coefficient of thermal expansion of silicon carbide?

9 * 10^-6

3.2 * 10^-6

4.3 * 10^-6

10.6 * 10^-6

Question 2 of 10

Question 3 of 10

3. Versalon, Zytel, and Plaskon are common trade names of which thermoplastic?

Polyamide

Polyacrylonitrile

Acetal

Polycarbonate

Question 3 of 10

Question 4 of 10

4. The below figure is an example of ______ type of structural composites.

Randomly oriented

Sandwich panel

Laminar

Discontinuous

Question 4 of 10

Question 5 of 10

5. Which of the following is a property of thermosetting plastics?

Soft

Can be used at high temperatures

Recyclable

Can be molded

Question 5 of 10

Question 6 of 10

6. Which of the following is not a type of silicon nitride ceramics?

Pressure-less sintered silicon nitride

Reaction bonded silicon nitride

Hot pressed silicon nitride

Stiff silicon nitride

Question 6 of 10

Question 7 of 10

7. Which of the following is regarded as a modern abrasive?

Boron carbide

Silicon carbide

Tripoli

Pumica

Question 7 of 10

Question 8 of 10

8. Which of the following is a type of particle-reinforced composites?

Laminates

Dispersion-strengthened

Sandwich panels

Continuous

Question 8 of 10

Question 9 of 10

9. Thermoplastics are formed by ________

Condensation polymerization

Isomerism

Copolymerization

Addition polymerization

Question 9 of 10

Question 10 of 10

10. Melamine formaldehyde can be used at temperatures up to _____

95^oC

150^oC

65^oC

240^oC

Question 10 of 10