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Chemical Engineering :: Chemical Engineering Basics

  1. Pick out the wrong statement:

  2. A.
    Soft water is more corrosive than that carrying calcium salts.
    B.
    The corrosion of brass condenser tubes handling brine solution is also termed as 'dezincification'.
    C.
    Non-annealed brass is highly susceptible to season cracking (i.e., inter-crystal corrosion due to internal stresses).
    D.
    Pure copper is highly susceptible to stress corrosion.

  3. The tensile strength of plastics ranges from __________ kg/mm2.

  4. A.
    10 to 50
    B.
    50 to 100
    C.
    0.01 to 0.1
    D.
    0.1 to 10

  5. Ceramic tips for the cutting tool are prepared from __________ powder.

  6. A.
    carbon
    B.
    silicon carbide
    C.
    aluminium oxide
    D.
    tungsten

  7. Grain hardness is measured by the __________ hardness testing method.

  8. A.
    Knoop
    B.
    Rockwell F
    C.
    Shore sceleroscope
    D.
    Vicker's

  9. The thermal efficiency of a heat engine giving an output of 4 KW with an input of 10000 Joules/sec is __________ percent.

  10. A.
    40
    B.
    80
    C.
    10
    D.
    25

  11. Which of the following alloying elements when added in steel does not improve its lachinability ?

  12. A.
    Sulphur
    B.
    Phosphorous
    C.
    Copper
    D.
    Lead

  13. Largest application of laser welding is in __________ welding.

  14. A.
    microspot
    B.
    under water
    C.
    precious metals
    D.
    heavy structure

  15. Which of the following is a neutral flux used in the pyrometallurgy of metal extraction?

  16. A.
    Quartz
    B.
    Flourspar
    C.
    Dolomite
    D.
    Manganese ore

  17. The critical pressure at which the latent heat of vaporisation of steam becomes zero is __________ Kg/cm2 .

  18. A.
    273.15
    B.
    225.65
    C.
    100.03
    D.
    373.15

  19. Value of a material is usually considered as a relationship between

  20. A.
    cost and profit.
    B.
    utility and appearance.
    C.
    utility and cost.
    D.
    reliability and utility.