| 1. | Which gas can attain the highest efficiency for the same compression rise ? | |
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Any of the gases
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Diatomic gases
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Mono atomic gases
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Tri-atomic gases
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Report Question| 2. | In Clausius theorem the reversible path is substituted by ________ ? | |
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reversible isobars
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reversible isotherms
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reversible isochoric
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None of these
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| 3. | _______ does not certain tin as an alloying element ? | |
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Babbitt metal
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White metal
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Solder
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All options are correct
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| 4. | _______ structure is obtained by austempering process of heat treatment ? | |
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Sorbite
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Bainite
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Martensite
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Troostite
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| 5. | Preheating is essential in welding ? | |
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high speed steel
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cast iron
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all non-ferrous materials
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None of these
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| 6. | The melting point is the lowest for ? | |
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low carbon steel
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high carbon steel
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cast iron
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wrought iron
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| 7. | _______ is commonly used for making household utensils ? | |
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Duralumin
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Hindalium
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?-alloy
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Magnalium
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| 8. | Ball bearings are generally made up of ? | |
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carbon steel
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carbon chrome steel
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stainless steel
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grey cast iron
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| 9. | ______ has high tendency to get work hardened ? | |
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Lead
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Aluminium
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Brass
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Silver
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| 10. | ______ is the hardest known material ? | |
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Cemented carbide
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Ceramic
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Diamond
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Alloy steel
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