Material Science and Metallurgy Quiz 1

Coordination number for an ideal BCC metallic crystal is:

• 8

• 6

• 12

• 24

In Fe-C diagram Compositions above 2.1% C is called as------------

• Ledeburite

• Ferrite

• Steel

• Cast iron

Diffusion is the result of:

• Random motion of particles

• Concentration gradient

• Kinetic energy of particles

• All of the mentioned

What is a phase?

• The substance which is physically distinct

• The substance which is homogenous chemically

• The substance which is both physically distinct and chemically homogenous

• The substance which is both physically distinct and chemically heterogeneous

Monel is an alloy of nickel.

• True

• False

Which of the following is the lightest among the following?

• Magnesium

• Aluminum

• Titanium

• Copper

Which of the following is not a name for time temperature transformation diagrams?

• S curve

• C curve isothermal diagram

• D curve isothermal diagram

• Bain’s curve

At room temperature which is the most stable form of iron?

• Pearlite

• Ledeburite
  

• Martensite

• α-iron

What is Gibbs phase rule for general system?

• P = C – 1 – F
  

• P = C + 1 – F

• P + F = C – 2
  

• P + F = C + 2

Which type of defect are point defects?

• One dimensional

• Zero dimensional

• two dimensional

• Three Dimensional