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Chemical Engineering :: Chemical Engineering Basics

  1. The normal stress is the same in all directions at a point in a fluid, only when the fluid

  2. A.
    is at rest & has zero viscosity.
    B.
    is frictionless.
    C.
    fluid layer has no motion relative to an adjacent layer of fluid.
    D.
    is incompressible & frictionless.

  3. A 2 kg object weighs 1.8 kgf on a spring balance. The value of 'g' at that location in m/sec2 is

  4. A.
    8.82
    B.
    9.81
    C.
    10.88
    D.
    0.95

  5. In chemical dehumidification of air

  6. A.
    both specific humidity & dry bulb temperature increases.
    B.
    both specific humidity & dry bulb temperature decreases.
    C.
    specific humidity decreases & dry bulb temperature increases.
    D.
    specific humidity increases & dry bulb temperature decreases.

  7. Pick out the correct statement.

  8. A.
    Hot worked materials are subjected to annealing to remove internal stresses.
    B.
    Annealing of steel hardens it slightly
    C.
    Normalising of a material induces stresses.
    D.
    Tempering of a material improves ductility & toughness but reducess hardness & brittlenes.

  9. Dielectric

  10. A.
    is an electrical insulating material.
    B.
    of low resistivity is preferred.
    C.
    should have high thermal conductivity.
    D.
    need not defy the corrosive action of chemicals.

  11. Normalising of an object does not

  12. A.
    refine coarse grain structure obtained during hot working.
    B.
    improve ductility.
    C.
    improve yield strength.
    D.
    improve machanical properties.

  13. Plasma is

  14. A.
    a high temperature neutral gas.
    B.
    nothing but ionised gas.
    C.
    a source of steady and highest controllable pressure.
    D.
    formed at very low temperature.

  15. The machanism involved in the removal of metal in drilling operation is by

  16. A.
    compression
    B.
    extrusion
    C.
    shearing
    D.
    both 'b' & 'c'

  17. Thermal conductivity of a material does not depend upon its

  18. A.
    mass
    B.
    volume
    C.
    surface area
    D.
    all 'a', 'b' & 'c'

  19. Carbon supply in pack carburising process is in the form of

  20. A.
    charcoal
    B.
    calcium carbide
    C.
    hydrocarbon oil
    D.
    graphite