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Chemical Engineering :: Chemical Engineering Basics

  1. The noble metals

  2. A.
    are exemplified by Na, K and Li.
    B.
    do not resist corrosion very strongly.
    C.
    are the lowermost in the electro-chemical series of metals.
    D.
    none of these.

  3. Which of the following is an example of cathodic protection of metals against corrosion ?

  4. A.
    Painted steel
    B.
    Galvanised iron
    C.
    Case hardened steel
    D.
    Lead lined reactor

  5. Thermal efficiency of an internal combustion engine is around __________ percent.

  6. A.
    8
    B.
    35
    C.
    65
    D.
    80

  7. Pick out the correct combination about the role of various additives used in polymers.

  8. A.
    Plasticiser : increases the polymer strength.
    B.
    Heat stabiliser : increases the maximum service temperature.
    C.
    Fillers: Does not affect the property of polymer but increases its weight.
    D.
    Lubricants: increases the flexibility of polymers.

  9. The lightest non-inflammable gas is

  10. A.
    H2
    B.
    He
    C.
    Ar
    D.
    O2

  11. Silicon crystal can be converted to p-type semi-conductor by doping with

  12. A.
    phosphorous
    B.
    nitrogen
    C.
    carbon
    D.
    boron

  13. Large diameter reinforced cement concrete (RCC) pipes are generally joined by __________ joint.

  14. A.
    flanged iron
    B.
    collar
    C.
    flexible
    D.
    expansion

  15. Increase in the entropy of a system represents the

  16. A.
    degradation of energy.
    B.
    decrease in system pressure.
    C.
    increase in the availability of energy.
    D.
    increase in the temperature.

  17. Property responsible for the talcum powder to cling to the skin is the

  18. A.
    capillary action
    B.
    adhesion
    C.
    cohesion
    D.
    surface tension

  19. __________ has a negative co-efficient of linear expansion.

  20. A.
    Iron
    B.
    Copper
    C.
    Rubber
    D.
    Nickel