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Chemical Engineering :: Chemical Engineering Basics-2

  1. In sheet metal forming, stretcher strains occur in

  2. A.

     Duralumin sheets

    B.

     Low carbon steel sheets

    C.

     Austenitic stainless steel sheets

    D.

     Ni-base alloy sheets


  3. Heat treatment of steel is done to mainly change its __________ properties.

  4. A.

     Physical

    B.

     Chemical

    C.

     Mechanical

    D.

     Surface


  5. Current employed in resistance welding ranges from __________ kVA/cm² .

  6. A.

     1.2 to 2.5

    B.

     4.5 to 6.2

    C.

     7.5 to 8.5

    D.

     10.5 to 15.5


  7. High relative humidity decreases the evaporative process and as the temperature is increased, the relative humidity decreases. The comfort range for human body is the ambient temperature of 22 to 27°C with relative humidity ranging from __________ percent.

  8. A.

     5 to 10

    B.

     15 to 25

    C.

     45 to 50

    D.

     75 to 80


  9. Fatigue strength of a metal is improved by

  10. A.

     Overstressing

    B.

     Scratching the surface

    C.

     Raising the temperature

    D.

     Understressing


  11. In practice, the compression ratio of compression-ignition (CI) engine ranges from

  12. A.

     15 to 25

    B.

     5 to 10

    C.

     40 to 55

    D.

     60 to 70


  13. Energy of the sun arises mainly from __________ reactions.

  14. A.

     Fusion

    B.

     Fission

    C.

     Combustion

    D.

     None of these


  15. The specific gravity of coal depends mainly on its __________ content.

  16. A.

     Carbon

    B.

     Volatile matter

    C.

     Ash

    D.

     Moisture


  17. A __________ type pressure sensing element is commonly used in aneroid barometer.

  18. A.

     Capsule

    B.

     Bellow

    C.

     Spiral tube

    D.

     Flat diaphragm


  19. No cutting fluid is normally used, while machining

  20. A.

     Cast iron

    B.

     Aluminium

    C.

     Mild steel

    D.

     Stainless steel