Technical Assistant Metallurgy Paper
| 1 | Which of the following is a carbonate ore [AIIMS 2005]
A) Pyrolusite B) Malachite C) Diaspore D) Cassiterite |
| 2 | The study of metallographic includes ____
(a) alloy constituents (b) failure analysis (c). metal structure (d) all of the above |
| 3 | What is the crystal structure of d-ferrite?
(a) Body centered cubic structure (b) Face centered cubic structure (c) Orthorhomic crystal structure (d) None of the above |
| 4 | Corrosion fatigue is a combined effect of _____
(a) Corrosive environment and mechanical stresses (b) Cyclic loading and corrosion (c) Velocity and mechanical stresses (d . None of the above |
| 5 | Which of the following is not an ore of lead [MP PMT 1993]
(a) Galena (b) Anglesite (c) Calamine (d) Cerrusite |
| 6 | The salt which is least likely to be found in minerals is [DPMT 1984]
(a) Chloride (b) Sulphate (c) Sulphide (d) Nitrate |
| 7 | Which of the following statement is incorrect [CPMT 1985]
(a) Silver glance mainly contains silver sulphide (b) Gold is found in native state (c) Zinc blende mainly contain zinc chloride (d) Copper pyrites also contain Fe2S3 |
| 8 | The process of decomposing martensitic structure, by heating martensitic steel below its critical temperature is called as _______
(a) Austenitizing (b) Quenching (c) Tempering (d) None of the above |
| 9 | Which of the following minerals is not an ore of aluminum
(a) Bauxite (b) Gypsum (c) Cryolite (d) Corundum |
| 10 | Which of the following metal is sometimes found native in nature
(a) Al (b) Cu (c) Fe (d) Mg |
Answers –
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 |
| b | d | a | b | c | d | c | c | b | b |
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