Influential Factors MCQ’s

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This set of Materials Science Multiple Choice Questions & Answers (MCQs) focuses on “Influential Factors”.

1. When something burns on the stove in the kitchen, the whole kitchen starts smelling smoky due to diffusion.
a) True
b) False

2. If we increase the temperature, how is the diffusion rate affected?
a) Diffusion rate increases
b) Diffusion rate decreases
c) Diffusion rate decreases drastically
d) Diffusion rate is not affected

3. On which of the following does diffusion not depend on?
a) Temperature
b) Pressure
c) Concentration difference
d) Diffusion distance

4. How is the diffusion rate affected by concentration difference?
a) Diffusion rate is not affected
b) Higher the concentration difference, higher the diffusion rate
c) Lower the concentration difference, higher the diffusion rate
d) Higher the concentration difference, lower the diffusion rate

5. How is the rate of diffusion affected by the weight of diffusing atom?
a) Lighter atoms diffuse faster
b) Heavier atoms diffuse faster
c) Lighter atom diffuses slower
d) Rate of diffusion doesn’t depend on weight of diffusing atom

6. Diffusion is slower in polycrystalline structure than single crystalline structure.
a) True
b) False

7. How is diffusion rate related to diffusion distance?
a) Directly related
b) Inversely related
c) Not related
d) Directly related to square of diffusion distance

8. Diffusion is slower for _________
a) Open crystal structure
b) Low density materials
c) Materials with lower melting temperature
d) Materials with covalent bonding

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