Home / GATE 2017-2018 / GATE Metallurgical :: Practice Test Paper 2

GATE 2017-2018 :: GATE Metallurgical

  1. Isothermal compressibility of a material is given by
  2. A.
    .

    B.
    .

    C.
    .

    D.
    .


  3. In the Ellingham diagram for oxides, C-CO line cuts the M-MO line at temperature T1 and the M²-M²O line at a higher temperature T2. At a temperature greater than T1 and less than T2, carbon can reduce
  4. A.
    MO
    B.
    both MO and M"²O
    C.
    M"²O
    D.
    neither MO nor M"²O

  5. Which one of the following can give information about the corrosion rate?
  6. A.
    Pourbaix diagram
    B.
    Polarization technique
    C.
    EMF series
    D.
    Galvanic series

  7. In a roasting process, the set of conditions that favour sulphate formation from metal sulphide concentrates are 
    P. high temperature 
    Q. high partial pressure of oxygen 
    R. use of excess air 
    S. high partial pressure of SO3
  8. A.
    P, R and S
    B.
    P, Q and R
    C.
    Q and S
    D.
    R and S

  9. High top pressure in a blast furnace operation
  10. A.
    favours the solution-loss reaction
    B.
    suppresses the solution-loss reaction
    C.
    decreases gas-solid contact time
    D.
    increases coke rate

  11. In L-D steelmaking, the final slag can be best described as
  12. A.
    oxidizing
    B.
    basic
    C.
    oxidizing and basic
    D.
    reducing and basic

  13. The permeability of burden in an ironmaking blast furnace can be improved by using
  14. A.
    fine charge
    B.
    agglomerated charge
    C.
    oxygen enriched air blast
    D.
    pulverized coal injection through the tuyeres

  15. For a good quality brazing, the molten filler alloy should have
  16. A.
    low contact angle with the base metal
    B.
    low density
    C.
    high surface tension
    D.
    high viscosity

  17. Risers are NOT required for casting
  18. A.
    stainless steel
    B.
    plain carbon steel
    C.
    grey cast iron
    D.
    white cast iron

  19. The atomic packing fraction of diamond cubic structure is __________
  20. A.
    2.123 to 2.125
    B.
    0.001 to 0.005
    C.
    0.339 to 0.341
    D.
    1.546 to 1.549