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- Question 1 of 15
During the roasting of a sulfide ore of a metal M, the possible solid phases are M, MS, MO and MSO4. Assuming that both SO2 and O2 are always present in the roaster, the solid phases that can co-exist at thermodynamic equilibrium areCorrectIncorrect
- Question 2 of 15
Match the entities in Column I with the corresponding processes in Column II.
Column I Column II
[P] Xanthate salts  Extraction of Al
[Q] Thiobacillus Ferrooxidans  Flotation
[R] Hydrocyclone  Classification
[S] Anode effect  Bacterial LeachingCorrectIncorrect
- Question 3 of 15
A sub-lance is used to monitor composition and temperature inCorrectIncorrect
- Question 4 of 15
The chemical formula of wüstite isCorrectIncorrect
- Question 5 of 15
The lattice parameter of face-centered cubic iron (γ-Fe) is 0.3571 nm. The radius (in nm) of the octahedral void in γ-Fe isCorrectIncorrect
- Question 6 of 15
For an ideal hexagonal-closed packed structure, the c/a ratio and packing efficiency respectively areCorrectIncorrect
- Question 7 of 15
A plastically deformed metal crystal at low temperature exhibits wavy slip line pattern due toCorrectIncorrect
- Question 8 of 15
Creep resistance decreases due toCorrectIncorrect
- Question 9 of 15
The operation NOT associated with casting isCorrectIncorrect
- Question 10 of 15
Of the following welding processes
[P] Laser Beam Welding
[Q] Submerged Arc Welding
[R] Metal Inert Gas Welding
the width of the heat-affected zone in decreasing order isCorrectIncorrect
- Question 11 of 15
Railway tracks are typically manufactured usingCorrectIncorrect
- Question 12 of 15
For dye-penetrant test, identify the CORRECT statementCorrectIncorrect
- Question 13 of 15
A rolling mill has a roll diameter of 200 mm. If coefficient of friction is 0.1, then the maximum possible reduction (in mm) during rolling of a 250 mm thick plate isCorrectIncorrect
- Question 14 of 15
A coin is tossed three times. It is known that out of the three tosses, one is a HEAD. The probability of the other two tosses also being HEADs isCorrectIncorrect
- Question 15 of 15
The grain sizes (in μm) measured at five locations in an alloy sample are: 16, 14, 18, 15 and 13. The mean, median and standard deviation of grain sizes respectively are (in μm)CorrectIncorrect