Material Science in Metallurgy MCQ Questions and Answers

1.
On decreasing the grain size of a polycrys talline material, the property most likely to deteriorate is

A. creep

B. toughness

C. tensile strength

D. fatigue strength

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2.
Most important property of steels for use in automoblie bodies is

A. formability

B. yield strength

C. toughness

D. resilience

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3.
p-type semi-conductor can be obtained by doping silicon with

A. antimony

B. phosphorous

C. arsenic

D. boron

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4.
Liquid nitrogen containers can be made, from

A. ferritic stainless steel

B. HSLA steel

C. Titanium

D. Austenitic stainless steel

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5.
Match the types of corrosion in Group 1 with their examples in Group 2.

Group 1 Group 2

P. Galvanic corrosion 1. Season cracking in brass

Q. Filiform corrosion 2. Nut-bolt assembly with gasket

R. Stress corrosion cracking 3. Brass fittings joined with lead-tin solder

S. Crevice corrosion 4. Painted food can

A. P-4, Q-1, R-2, S-3

B. P-3, Q-1, R-4, S-2

C. P-3, Q-4, R-1, S-2

D. P-4, Q-2, R-3, S-1

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6.
With respect to the matrix of Al-Cu alloys, G-P zones are

A. coherent

B. incoherent

C. semi-coherent

D. chemically indistinguishable

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7.
Which one of the following microstructures of a Ni-base superalloy imparts the highest creep resistance?

A. Fine grained equiaxed

B. Coarse grained equiaxed

C. Columnar

D. Single crystal

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8.
Titanium is added to molten aluminium alloys before casting for the purpose of

A. grain refinement

B. increasing corrosion resistance

C. reducing porosity

D. improving fluidity

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9.
To obtain super-plasticity, the alloy should
P. have a fine grain structure that is also stable at high temperature
Q. be deformed at low temperature
R. be deformed at low strain rates
S. be deformed at high strain rates

A. P, R

B. Q, S

C. Q, R

D. P, Q

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10.
Match the cast irons in Group 1 with the distinguishing microstructural features in Group 2.

Group 1 Group 2

P. Grey cast iron 1. Temper graphite

Q. Ductile cast iron 2. Pearlite

R. Malleable cast iron 3. Graphite flakes

S. White cast iron 4. Massive cementite

5. Nodular graphite

A. P-3, Q-5, R-4, S-2

B. P-1, Q-S, R-4, S-2

C. P-2, Q-4, R-5, S-3

D. P-3, Q-5, R-1, S-4

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Group 1	Group 2
P. Galvanic corrosion	1. Season cracking in brass
Q. Filiform corrosion	2. Nut-bolt assembly with gasket
R. Stress corrosion cracking	3. Brass fittings joined with lead-tin solder
S. Crevice corrosion	4. Painted food can

Group 1	Group 2
P. Grey cast iron	1. Temper graphite
Q. Ductile cast iron	2. Pearlite
R. Malleable cast iron	3. Graphite flakes
S. White cast iron	4. Massive cementite
	5. Nodular graphite

Material Science in Metallurgy MCQ Questions and Answers | Metallurgical Engineering

1. On decreasing the grain size of a polycrys talline material, the property most likely to deteriorate is

Answer & Solution

2. Most important property of steels for use in automoblie bodies is

Answer & Solution

3. p-type semi-conductor can be obtained by doping silicon with

Answer & Solution

4. Liquid nitrogen containers can be made, from

Answer & Solution

Answer & Solution

6. With respect to the matrix of Al-Cu alloys, G-P zones are

Answer & Solution

7. Which one of the following microstructures of a Ni-base superalloy imparts the highest creep resistance?

Answer & Solution

8. Titanium is added to molten aluminium alloys before casting for the purpose of

Answer & Solution

9. To obtain super-plasticity, the alloy should P. have a fine grain structure that is also stable at high temperature Q. be deformed at low temperature R. be deformed at low strain rates S. be deformed at high strain rates

Answer & Solution

10. Match the cast irons in Group 1 with the distinguishing microstructural features in Group 2. Group 1 Group 2 P. Grey cast iron 1. Temper graphite Q. Ductile cast iron 2. Pearlite R. Malleable cast iron 3. Graphite flakes S. White cast iron 4. Massive cementite 5. Nodular graphite

Answer & Solution

1.
On decreasing the grain size of a polycrys talline material, the property most likely to deteriorate is

2.
Most important property of steels for use in automoblie bodies is

3.
p-type semi-conductor can be obtained by doping silicon with

4.
Liquid nitrogen containers can be made, from

6.
With respect to the matrix of Al-Cu alloys, G-P zones are

7.
Which one of the following microstructures of a Ni-base superalloy imparts the highest creep resistance?

8.
Titanium is added to molten aluminium alloys before casting for the purpose of

9.
To obtain super-plasticity, the alloy should
P. have a fine grain structure that is also stable at high temperature
Q. be deformed at low temperature
R. be deformed at low strain rates
S. be deformed at high strain rates

10.
Match the cast irons in Group 1 with the distinguishing microstructural features in Group 2.

Group 1 Group 2

P. Grey cast iron 1. Temper graphite

Q. Ductile cast iron 2. Pearlite

R. Malleable cast iron 3. Graphite flakes

S. White cast iron 4. Massive cementite

5. Nodular graphite