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Corrosion And Oxidation(Engineering > Engineering Materials ) Questions and Answers
Home
Topic
Engineering
Engineering Materials
Corrosion And Oxidation
Question 1.
What is the Faraday’s constant?
96.49 kC mol⁻¹
99.01 kC mol⁻¹
100.3 kC mol⁻¹
104.49 kC mol⁻¹
Explanation:-
Answer: Option A. ->
96.49 kC mol⁻¹
Answer:
(a).
96.49 kC mol⁻¹
Question 2.
What is the Piling-Bedworth ratio of MgO?
0.41
0.79
1.71
2.03
Explanation:-
Answer: Option B. ->
0.79
Answer:
(b).
0.79
Question 3.
What is the free energy of formation value for Al₂O₃?
419 kJ mol⁻¹
1045 kJ mol⁻¹
1576 kJ mol⁻¹
2562 kJ mol⁻¹
Explanation:-
Answer: Option C. ->
1576 kJ mol⁻¹
Answer:
(c).
1576 kJ mol⁻¹
Question 4.
How is the Faraday’s constant defined?
F = e Nᴀ
F = e / Nᴀ
F = e + Nᴀ
F = Nᴀ / e
Explanation:-
Answer: Option A. ->
F = e Nᴀ
Answer:
(a).
F = e Nᴀ
Question 5.
A galvanic cell set up due to differences in the concentration of metal ion is known as ________
Concentration ion
Concentration cell
Admiralty ion
Admiralty cell
Explanation:-
Answer: Option B. ->
Concentration cell
Answer:
(b).
Concentration cell
Question 6.
The rate of crack propagation in brittle fracture is _______
Nonexistent
Slow
Rapid
Random
Explanation:-
Answer: Option C. ->
Rapid
Answer:
(c).
Rapid
Question 7.
Which of the following can be applied to prevent ductile fracture?
Fine grains
Low hardness
Low Young’s modulus
High-temperature treatment
Explanation:-
Answer: Option A. ->
Fine grains
Answer:
(a).
Fine grains
Question 8.
__________ can be added to steels to prevent intergranular failure.
Sulfur
Manganese
Silicon
Wood
Explanation:-
Answer: Option B. ->
Manganese
Answer:
(b).
Manganese
Question 9.
Which of the following is not applicable for prevention of fatigue fracture?
Reduction of corrosive environment
Coarse grain structure
No residual stresses
Good surface finish
Explanation:-
Answer: Option B. ->
Coarse grain structure
Answer:
(b).
Coarse grain structure
Question 10.
Pyroceram has excellent thermal resistance due to its ________
Surface finish
Melting point
Ion exchange
Grain size
Explanation:-
Answer: Option D. ->
Grain size
Answer:
(d).
Grain size
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