Home / GATE 2017-2018 / GATE Metallurgical :: Practice Test Paper 1

GATE 2017-2018 :: GATE Metallurgical

  1. Consider a reaction with activation energy of 8.314 kJ/mol that takes place at 300 K. If the reaction rate is to be tripled, the temperature of the reaction should be
  2. A.
    174.5 K
    B.
    447.5 K
    C.
    600.5 K
    D.
    847.5 K

    View Answer

    Workspace

    Discuss Discuss in Forum


  3. Match the processes in Group I with the objectives in Group II
    Group I                              Group II
    P. Vacuum Arc Degassing (VAD) 1. Primary iron making
    Q. LD                           2. Secondary steel making
    R. COREX                    3. Direct smelting
    S. Blast Furnace        4. Primary steel making
  4. A.
    P-3, Q-4, R-2, S-1
    B.
    P-4, Q-3, R-1, S-2
    C.
    P-3, Q-2, R-1, S-4
    D.
    P-2, Q-4, R-3, S-1

    View Answer

    Workspace

    Discuss Discuss in Forum


  5. The reduction of FeO with CO gas in co-current flow is given by the following equation: 
    FeO + CO = Fe + CO2            ∆Go = 8120 J at 1173 K 
    The ratio of pCO/pCO2 for this reaction at 1173 K is
  6. A.
    0.0
    B.
    0.25
    C.
    0.44
    D.
    2.3

    View Answer

    Workspace

    Discuss Discuss in Forum


  7. The sulphide capacity (CS) of liquid slag of composition 55 wt.% CaO, 20 wt.% SiO2, 5 wt.% Al2O3, and 10 wt.% MgO is given by the following equation
    log CS = 3.44 (XCaO + 0.1 XMgO - 0.8 XAl2O3 - XSiO2) - (9894/T) + 2.05 
    where, X is mole fraction of the respective components. Atomic weights of Ca, Mg, Si, Al and O are 40, 24, 28, 27 and 16 respectively. 
    The value of CS at 1900 K is
  8. A.
    0.0009
    B.
    0.009
    C.
    0.09
    D.
    0.9

    View Answer

    Workspace

    Discuss Discuss in Forum


  9. Identify the correct combination of the following statements 
    P. Bessemer converter can be used in copper smelting 
    Q. The Mond process for nickel involves reaction of metal with H2 gas 
    R. Roasted ZnS concentrates can be smelted in a blast furnace 
    S. Magnesium metal can be produced by electrolysis of sea water
  10. A.
    P, R and S
    B.
    P, Q and R
    C.
    P and Q
    D.
    Q and S

    View Answer

    Workspace

    Discuss Discuss in Forum


  11. Match the phases of steel in Group I with the crystal structures in Group II
    Group I               Group II
    P. Martensite     1. bcc
    Q. Cementite     2. fcc
    R. Austenite       3. bct
    S. Ferrite            4. Orthorhombic
  12. A.
    P-3, Q-4, R-1, S-2
    B.
    P-2, Q-3, R-1, S-4
    C.
    P-3, Q-4, R-2, S-1
    D.
    P-4, Q-3, R-2, S-1

    View Answer

    Workspace

    Discuss Discuss in Forum


  13. Arrange the following in terms of increasing severity of quench 
    P. Oil quenching 
    Q. Water quenching 
    R. Water quenching with agitation 
    S. Brine quenching
  14. A.
    P < Q < R < S
    B.
    Q < R < P < S
    C.
    P < Q < S < R
    D.
    Q < P < R < S

    View Answer

    Workspace

    Discuss Discuss in Forum


  15. Regarding recrystallization, which one of the following statements is NOT correct?
  16. A.
    Higher the amount of cold work, lower is the recrystallization temperature
    B.
    Higher the recovery, higher is the recrystallization temperature
    C.
    Higher the temperature of cold work, higher is the recrystallization temperature
    D.
    Finer the initial grain size, higher is the recrystallization temperature

    View Answer

    Workspace

    Discuss Discuss in Forum


  17. A liquid droplet (β) is on a substrate (δ) and is surrounded by air (α), as shown below. The angle of contact (θ) is determined using the following expression:

  18. A.
    θ = cos-1{(ϒαδ - ϒβδ)/ϒαβ}
    B.
    θ = cos-1{(ϒαδ - ϒαβ)/ϒαβ}
    C.
    θ = cos-1{(ϒαδ - ϒβδ)/ϒαδ}
    D.
    θ = cos-1{(ϒαδ - ϒβδ)/ϒβδ}

    View Answer

    Workspace

    Discuss Discuss in Forum


  19. Match the phenomena listed in Group I with the possible mechanisms in Group II
    Group I                                Group II
    P. Fatigue                        1. Grain boundary sliding
    Q. Creep                          2. Slip band extrusion and intrusion
    R. Strain hardening        3. Cottrell atmosphere
    S. Yield point phenomenon  4. Dislocation interaction
  20. A.
    P-2, Q-3, R-4, S-1
    B.
    P-2, Q-4, R-3, S-1
    C.
    P-2, Q-1, R-4, S-3
    D.
    P-1, Q-2, R-4, S-3

    View Answer

    Workspace

    Discuss Discuss in Forum