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Chemical Engineering :: Materials and Construction

  1. Babbit metal (used for making bearings) comprises of

  2. A.
    mainly tin (85%) and lead.
    B.
    saw dust and iron dust mixture.
    C.
    zinc and aluminium.
    D.
    copper and aluminium.

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  3. Hydrochloric acid is stored in a __________ steel vessel.

  4. A.
    lead lined
    B.
    rubber lined
    C.
    glass lined
    D.
    stainless

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  5. Chrome vanadium steels usually contain 0.8 to 1.1% Cr, 0.25 to 0.35% C and < 0.25% V. It is

  6. A.
    used for making axle & shafts of aeroplanes, automobiles and locomotives.
    B.
    having poor fatigue resistance.
    C.
    having poor toughness.
    D.
    not helpful in producing cleaner steel due to oxidising action of vanadium.

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  7. Which of the following alloying elements is present in maximum percentage in high speed steel.

  8. A.
    Molybdenum
    B.
    Chromium
    C.
    Tungsten
    D.
    Vanadium

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  9. Electronic structure of a material is generally studied by

  10. A.
    metallurgical microscope
    B.
    electron diffraction
    C.
    spectroscopic techniques
    D.
    X-ray

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  11. Which of the following has the poorest wel-dability ?

  12. A.
    Low carbon steel
    B.
    Mild steel
    C.
    Wrought iron
    D.
    High-carbon steel

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  13. Creep is not exhibited at low temperature by

  14. A.
    rubber
    B.
    acrylics
    C.
    lead
    D.
    plastics

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  15. Nickel and molybdenum are the basic constituents of

  16. A.
    hastealloy
    B.
    German silver
    C.
    inconel
    D.
    solder

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  17. Spark plugs, ignition tubes and electrodes are made of nickel __________ alloys.

  18. A.
    beryllium
    B.
    manganese
    C.
    copper
    D.
    iron

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  19. A steel alloy containing 36% nickel is called __________ , which has a zero co-efficient of expansion.

  20. A.
    austenitic stainless steel
    B.
    heat resisting steel
    C.
    invar
    D.
    high speed steel

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