Material Science In Metallurgy — Part 1 MCQs with Explanations

Definition: A composite material is made up of two or more distinct constituents that remain separate and distinct on a macroscopic level, working together to provide combined properties. Composition of wood: Wood is a naturally occurring composite consisting mainly of cellulose fibers (which provide strength and flexibility) embedded in a lignin matrix (which acts as a binder and provides rigidity). Reason: The cellulose fibers act as the reinforcement phase, while lignin serves as the matrix phase, giving wood its unique combination of strength, toughness, and workability. Conclusion: Since wood is made of distinct natural components functioning together like a composite material, it is classified as a naturally occurring composite .

toughness is the correct answer to “Most important property of steels for use in automoblie bodies is”. This question is standard in competitive examination syllabi for Material Science In Metallurgy.

boron is the correct answer to “p-type semi-conductor can be obtained by doping silicon with”. This question is standard in competitive examination syllabi for Material Science In Metallurgy.

HSLA steel is the correct answer to “Liquid nitrogen containers can be made, from”. This question is standard in competitive examination syllabi for Material Science In Metallurgy.

P-3, Q-4, R-1, S-2 is the correct answer to “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”. This question is standard in competitive examination syllabi for Material Science In Metallurgy.

coherent is the correct answer to “With respect to the matrix of Al-Cu alloys, G-P zones are”. This question is standard in competitive examination syllabi for Material Science In Metallurgy.

Single crystal is the correct answer to “Which one of the following microstructures of a Ni-base superalloy imparts the highest creep resistance”. This question is standard in competitive examination syllabi for Material Science In Metallurgy.

improving fluidity is the correct answer to “Titanium is added to molten aluminium alloys before casting for the purpose of”. This question is standard in competitive examination syllabi for Material Science In Metallurgy.

P, R is the correct answer to “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”. This question is standard in competitive examination syllabi for Material Science In Metallurgy.

P-3, Q-5, R-1, S-4 is the correct answer to “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”. This question is standard in competitive examination syllabi for Material Science In Metallurgy.

P-4, Q-3, R-1, S-2 is the correct answer to “Match the alloy names listed in Group I with the main elements present in them listed in Group II . Group I Group II P. Babbit 1. Fe-Ni Q. Muntz metal 2. Ni-Cr-Fe R. Invar 3. Cu-Zn S. Inconel Group II 4. Sn-Sb-Cu”. This question is standard in competitive examination syllabi for Material Science In Metallurgy.

Shot peening is the correct answer to “The fatigue resistance of material is improved by the following techique:”. This question is standard in competitive examination syllabi for Material Science In Metallurgy.

stiffness is the correct answer to “Young's modulus of a material gives an idea about”. This question is standard in competitive examination syllabi for Material Science In Metallurgy.

.increasing the cross-link density is the correct answer to “In polymers such as epoxy, creep resistance can be enhanced by”. This question is standard in competitive examination syllabi for Material Science In Metallurgy.

are effective in limiting grain growth is the correct answer to “A small amount of thoria is doped into tungsten filament wires used in light bulbs. This is because thoria particles”. This question is standard in competitive examination syllabi for Material Science In Metallurgy.

Ni-based alloys is the correct answer to “Super alloys are”. This question is standard in competitive examination syllabi for Material Science In Metallurgy.

P-4, Q-1, R-5, S-3 is the correct answer to “Match the materials in Group 1 with the Young's modulus (GPa) in Group 2 . Group 1 Group 2 P. Copper 1. 4 Q. Ployvinyl cholride 2. 37 R. Steel 3. 70 S. Silicate glass 4. 110 5. 207 6. 700”. This question is standard in competitive examination syllabi for Material Science In Metallurgy.

increases the ductility transition temperature is the correct answer to “Increasing the carbon content of steel”. This question is standard in competitive examination syllabi for Material Science In Metallurgy.

improves the corrosion resistance of aluminium is the correct answer to “Lithium is a useful alloying addition to aluminium, because it”. This question is standard in competitive examination syllabi for Material Science In Metallurgy.

silicon carbide is the correct answer to “A heating element that is resistant in air upto 1700°C is”. This question is standard in competitive examination syllabi for Material Science In Metallurgy.

P-3, Q-1, R-4, S-2 is the correct answer to “Match the non-ferrous alloy in Group 1 with their applications in Group 2 . Group 1 Group 2 P. Ti alloy 1. Nuclear reactors Q. Zr alloy 2. Bells R. Ni alloy 3. Dental implants S. Cu alloy 4. Gas turbines”. This question is standard in competitive examination syllabi for Material Science In Metallurgy.

Toughness increases is the correct answer to “Select the incorrect statement related to the effect of a small amount of carbon addition on mechanical properties of iron.”. This question is standard in competitive examination syllabi for Material Science In Metallurgy.

$$\rho m$$ increases and $$\rho s$$ decreases is the correct answer to “As temperature increases, the electrical resistivities of pure metals $$\left( {\rho m} \right)$$ and intrinsic semiconductors $$\left( {\rho s} \right)$$ vary as follows”. This question is standard in competitive examination syllabi for Material Science In Metallurgy.

Pearlitic cast iron is the correct answer to “Which of the following materials do not respond well to induction hardening”. This question is standard in competitive examination syllabi for Material Science In Metallurgy.

P-2, Q-1, R-4, S-3 is the correct answer to “Match the properties in Group 1 with materials in Group 2 . Group 1 Group 2 P. Diamagnetic 1. Aluminium Q. Paramagnetic 2. Copper R. Ferromagnetic 3. Yittrium iron garnet S. Ferrimagnetic 4. Cobalt”. This question is standard in competitive examination syllabi for Material Science In Metallurgy.

P-3, Q-4, R-2, S-1 is the correct answer to “Match the materials in Group 1 with their functional applications in Group 2 . Group 1 Group 2 P. Nb 3 Sn 1. Dielectric Q. Ga. As 2. Soft magnet R. Fe - 4% Si alloy 3. Super conductor S. SiO 2 4. Semi-conductor”. This question is standard in competitive examination syllabi for Material Science In Metallurgy.

P-2, Q-3, R-4, S-1 is the correct answer to “Match the following components to their material. P. Bush bearings 1. Tungsten-silver Q. Incandescent lamp filaments 2. Copper-tin R. Cutting tools 3. Thoria doped tungsten S. Heavy duty electrical contacts 4. Tungsten carbide-13% cobalt”. This question is standard in competitive examination syllabi for Material Science In Metallurgy.

Resilience is the correct answer to “Which one of the following refers to the ability of a material to absorb energy when deformed elastically”. This question is standard in competitive examination syllabi for Material Science In Metallurgy.

Ni is the correct answer to “The preferred alloying for low temperature application of steel is”. This question is standard in competitive examination syllabi for Material Science In Metallurgy.

high permeability is the correct answer to “A soft magnetic material should have”. This question is standard in competitive examination syllabi for Material Science In Metallurgy.

P-3, Q-4, R-1, S-2 is the correct answer to “Match the cast irons with applications. P. Grey cast iron 1. S.G iron pipes Q. White cast iron 2. Chemical processing equipments requiring high corrosion, erosion and heat resistance R. Nodular cast iron 3. Bases or beds of industrial equipments S. Ni resist cast iron 4. Manufacture of malleable cast iron”. This question is standard in competitive examination syllabi for Material Science In Metallurgy.

lies above and to the left is the correct answer to “As compared to the engineering stress-engineering strain curve, the true stress-true strain curve for a given material”. This question is standard in competitive examination syllabi for Material Science In Metallurgy.

P-3, Q-4, R-1, S-2 is the correct answer to “Match the materials listed in Group I with the most appropriate applications listed in Group II . Group I Group II P. Iron-silicon alloy 1. Heating element Q. GaAs 2. Ultrasonic generator R. Nichrome 3. Transformer core S. Quartz crystals 4. Light emitting diode”. This question is standard in competitive examination syllabi for Material Science In Metallurgy.

P-2, Q-4, R-1, S-3 is the correct answer to “Match the following materials to their specific applications. P. White cast irons 1. Damping capacity Q. Age hardened Al alloys 2. Wear resistance R. Grey cast irons 3. High temperature applications S. Superalloys 4. Aerospace structural applications”. This question is standard in competitive examination syllabi for Material Science In Metallurgy.

P-1, Q-2, R-4, S-3 is the correct answer to “Match the material/application in the following cases. P. Grey cast iron 1. Lathe bed Q. Austenitic stainless steel 2. Oil piplines R. High strength low alloy steel 3. Gas turbine engines components S. Nickel base superalloy 4. Cryogenic service”. This question is standard in competitive examination syllabi for Material Science In Metallurgy.

grain oriented Fe-Si alloy is the correct answer to “Transformer cores are normally made from”. This question is standard in competitive examination syllabi for Material Science In Metallurgy.

Bronze is the correct answer to “Which of the following materials is not suitable as a die material for wire drawing”. This question is standard in competitive examination syllabi for Material Science In Metallurgy.

P-4, Q-2, R-1, S-3 is the correct answer to “Match the following P. Nickel-silvers 1. Alloys of tin, antimony and copper used as a bearing material Q. Nitralloys 2. Steel used for nitriding containing aluminium, chromium and molybed num R. Babbits 3. Soft magnetic material used as electromagnet S. Permalloy 4. Ternery alloys of copper, nickel and zinc with good cold formability”. This question is standard in competitive examination syllabi for Material Science In Metallurgy.

a p-type semiconductor is the correct answer to “When boron (trivalent) is doped to silicon, the resulting material is”. This question is standard in competitive examination syllabi for Material Science In Metallurgy.

creep resistance is the correct answer to “The single most important requirement for a turbine blade material is”. This question is standard in competitive examination syllabi for Material Science In Metallurgy.