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Chemical Engineering :: Chemical Engineering Basics

  1. Aromatics are desired constituents of

  2. A.
    lubricating oil
    B.
    diesel
    C.
    kerosene
    D.
    petrol

  3. Galvanic corrosion

  4. A.
    occurs in a bimetal couple.
    B.
    occurs in highly stressed metallic parts only.
    C.
    is exemplified by caustic embrittlement of boiler tubes.
    D.
    is also called dezincification.

  5. Increasing the temperature of a material makes it

  6. A.
    harder
    B.
    softer
    C.
    tougher
    D.
    stronger

  7. Which of the following absorbs maximum heat in a high pressure boiler ?

  8. A.
    Economiser
    B.
    Steam superheater
    C.
    Air preheater
    D.
    Furnace water wall

  9. The laminar boundary layer thickness in zero pressure gradient flow over a flat plate along the x-direction varies as x0.5 while the thickness of turbulent boundary layer varies as (where, x = distance from the leading edge)

  10. A.
    x1.5
    B.
    x0.8
    C.
    x-1.5
    D.
    x-0.8

  11. __________ cycle is the most efficient thermodynamic cycle.

  12. A.
    Diesel
    B.
    Otto
    C.
    Rankine
    D.
    Carnot

  13. Dew point of air indicates its

  14. A.
    moisture content
    B.
    dryness
    C.
    latent heat
    D.
    coolness

  15. Out of the following, __________ waves have the largest wavelength.

  16. A.
    radio
    B.
    light
    C.
    X-ray
    D.
    Gamma-ray

  17. Pick the odd man out of the following.

  18. A.
    Calorising
    B.
    Pack carburising
    C.
    Nitriding
    D.
    Cyaniding

  19. A furnace is made of a refractory brick wall of thickness 0.5 metre and thermal conductivity 0.7 W/m.°K For the same temperature drop and heat loss, this refractory wall can be replaced by a layer of diatomaceous earth of thermal conductivity 0.14 W/m.K and thickness __________ metre.

  20. A.
    0.01
    B.
    0.1
    C.
    0.25
    D.
    0.5