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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.

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

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

  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.

  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

  9. Electronic structure of a material is generally studied by

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

  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

  13. Creep is not exhibited at low temperature by

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

  15. Nickel and molybdenum are the basic constituents of

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

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

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

  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