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  1. Which of the following will resist maxi-mum shock & vibration without cracking?

  2. A.

     Grey cast iron

    B.

     White cast iron

    C.

     Malleable iron

    D.

     Graphite

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  3. Volume of blast furnace slag is about __________ times the volume of hot metal (pig iron) of the same weight

  4. A.

     1.5

    B.

     3

    C.

     5

    D.

     7

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  5. The most commonly used combustion system manufactured in India for the thermal power plant boilers is the __________ combustion system.

  6. A.

     Pulverised fuel

    B.

     Travelling grate stoker firing

    C.

     Circulating fluidised bed

    D.

     Fluidised bed

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  7. Isotropic materials have the same __________ in all directions.

  8. A.

     Induced stresses

    B.

     Density

    C.

     Elastic properties

    D.

     Thermal properties

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  9. Carbon is present in the form of __________ in grey cast iron.

  10. A.

     Spheroids

    B.

     Nodular aggregates of graphite

    C.

     Flakes

    D.

     Cementite

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  11. First empirical temperature scale conceived is the __________ temperature scale.

  12. A.

     Absolute

    B.

     Reaumer

    C.

     Farenhite

    D.

     Celcius

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  13. If a heat transfer surface is pock-marked with a number of cavities, then as compared to a smooth surface the heat transfer by __________ will not increase.

  14. A.

     Convection

    B.

     Nucleate boiling

    C.

     Radiation

    D.

     Conduction

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  15. Pick out the wrong statement.

  16. A.

     Molecules with symmetrical arrangements (.e.g. CH₄ or CCl₄) are nonpolar

    B.

     Generally, nonpolar compounds are chemically inactive, conduct electricity poorly and do not ionise

    C.

     Most of the hydrocarbons are nonpolar

    D.

     None of these

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  17. Materials having resistivity ranging from 1 to 100 ohm. cm is termed as

  18. A.

     Conductor

    B.

     Insulator

    C.

     Semi-conductor

    D.

     None of these

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  19. Alloys having more than 80% copper are generally more

  20. A.

     Abrasion resistant

    B.

     Corrosion resistant

    C.

     Prone to season cracking

    D.

     Machinable

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