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Chemical Engineering :: Chemical Engineering Basics-2

  1. Probability of cavitation occuring becomes very high, when the local __________ resulting in water bubbles formation, which on rupture cause cavitation

  2. A.

     Pressure falls below the vapour pressure

    B.

     Pressure becomes very high

    C.

     Temperature becomes low

    D.

     All of the above

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  3. Tip of the match stick contains a mixture of

  4. A.

     K + S

    B.

     K + S + K₂Cr₂O₇

    C.

     S + K₂Cr₂O₇ + White P

    D.

     None of these

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  5. A friction lighter is normally used for lighting gas welding torch, because of the reason that

  6. A.

     Its initial cost is very low

    B.

     Duration of spark created is very small

    C.

     Safety of welder is ensured

    D.

     It is easier to operate & maintain

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  7. Gratings is associated with the measurement of

  8. A.

     Linear displacement

    B.

     Concavity/convexity

    C.

     Surface texture

    D.

     Flatness

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  9. Nickel is a __________ material.

  10. A.

     Ferromagnetic

    B.

     Semi-conductor

    C.

     Paramagnetic

    D.

     Ferroelectric

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  11. Coarse grained steels have

  12. A.

     Low toughness

    B.

     No tendency to distort

    C.

     High density

    D.

     Very high toughness

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  13. Colloids can be purified by

  14. A.

     Dialysis

    B.

     Reverse osmosis

    C.

     Coagulation

    D.

     Peptization

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  15. An oxidation process is accompanied with decrease in the

  16. A.

     Number of electrons

    B.

     Oxidation number

    C.

     Number of ions

    D.

     All of the above

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  17. A reduction process is accompanied with increase in the

  18. A.

     Number of electrons

    B.

     Oxidation number

    C.

     Both A & B

    D.

     Neither A nor B

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  19. Ceramic compounds as compared to metallic compounds

  20. A.

     Crystallise faster

    B.

     Resist greater tensile stress at room temperature

    C.

     Have higher melting temperature

    D.

     Are better conductor of electricity at higher temperature

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