A heating element that is resistant in air upto 1700°C is
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Metallurgical Engineering · all questionsMaterial Science in Metallurgy
Material Science in Metallurgy
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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 |
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An alloy of Fe-0.4% C is
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Select the incorrect statement related to the effect of a small amount of carbon addition on mechanical properties of iron.
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As temperature increases, the electrical resistivities of pure metals and intrinsic semiconductors vary as follows
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Which of the following materials do not respond well to induction hardening?
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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 |
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Match the materials in Group 1 with their functional applications in Group 2.
| Group 1 | Group 2 |
| P. Nb3Sn | 1. Dielectric |
| Q. Ga. As | 2. Soft magnet |
| R. Fe - 4% Si alloy | 3. Super conductor |
| S. SiO2 | 4. Semi-conductor |
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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 |
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Lead is added to 60 - 40 brass primarily to improve
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Which one of the following refers to the ability of a material to absorb energy when deformed elastically?
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The preferred alloying for low temperature application of steel is
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A soft magnetic material should have
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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 |
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As compared to the engineering stress-engineering strain curve, the true stress-true strain curve for a given material
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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 |
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Wood is a naturally occuring . . . . . . . . material.
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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 |
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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 |
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Transformer cores are normally made from
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