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Chemical Engineering :: Chemical Engineering Basics-2

  1. Alcohols are not suitable as diesel engine fuel because the cetane number of alcohols is

  2. A.

     Very low which prevents their ignition by compression

    B.

     Very high which prevents their ignition by compression

    C.

     Zero

    D.

     None of these


  3. During brazing, if the fluxes are entrapped, it results in the

  4. A.

     Distortion of brazed joints

    B.

     Cracking of joints

    C.

     Presence of gas pockets

    D.

     Corrosion


  5. Which of the following is a disaccharide?

  6. A.

     Lactose

    B.

     Starch

    C.

     Cellulose

    D.

     Fructose


  7. Which one of the following is incombustible ?

  8. A.

     H₂

    B.

     CCl₄

    C.

     C₂H₂

    D.

     S


  9. The entropy change for a spontaneous process is

  10. A.

     > 0 for the system

    B.

     < 0 for the system

    C.

     > 0 for the system & the surrounding

    D.

     < 0 for the system & the surrounding


  11. The transition temperature at which all the ferromagnetic materials become paramagnetic materials is termed as the 'Curie temperature'. Its value for cobalt is __________ °C.

  12. A.

     768

    B.

     1127

    C.

     1359

    D.

     1480


  13. Baffles provided on the shell side of a shell and tube heat exchanger are meant for

  14. A.

     Providing support for the tubes

    B.

     Improving heat transfer

    C.

     Both A & B

    D.

     Preventing the fouling of tubes & stagnation of shell side fluid


  15. Iron content in Indian iron ore is about __________ percent.

  16. A.

     80-85

    B.

     60-65

    C.

     40-45

    D.

     20-25


  17. Suitability of steel for its use in cable is judged by its strength in

  18. A.

     Tension

    B.

     Compression

    C.

     Torsion

    D.

     Shear


  19. Which of the following is the largest quantum of pressure?

  20. A.

     1 kg/cm²

    B.

     1 bar

    C.

     1 atmosphere

    D.

     1 kilo Pascal