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## World's #1 Metallurgy Student Community Latest Questions

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No votes. Be the first one to vote.

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23.53%A ( 4 voters )
17.65%B ( 3 voters )
47.06%C ( 8 voters )
11.76%D ( 2 voters )

Based On 17 Votes

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29.79%Aluminium ( 14 voters )
65.96%Iron ( 31 voters )
2.13%Nickel ( 1 voter )
2.13%Cobalt ( 1 voter )

Based On 47 Votes

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70.21%(A) 1705 kg, 431 kg ( 33 voters )
0%(B) 2131 kg, 546 kg
27.66%(C) 1705 kg, 331 kg ( 13 voters )
2.13%(D) 1500 kg, 431 kg ( 1 voter )

Based On 47 Votes

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83.33%(A) P-2, Q-1, R-4, S-3 ( 15 voters )
5.56%(B) P-4, Q-1, R-2, S-3 ( 1 voter )
11.11%(C) P-4, Q-3, R-1, S-2 ( 2 voters )
0%(D) P-2, Q-3, R-4, S-1

Based On 18 Votes

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66.67%(A) ∆𝑃𝑅 / 2𝐿 ( 10 voters )
13.33%(B) ∆𝑃𝑅/ 𝐿 ( 2 voters )
20%(C) 3∆𝑃𝑅 / 2𝐿 ( 3 voters )
0%(D) 2∆𝑃𝑅 / 𝐿

Based On 15 Votes

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72.73%(A) 200 K, 0.5 K W-1 ( 8 voters )
9.09%(B) 400 K, 1.0 K W-1 ( 1 voter )
9.09%(C) 200 K, 0.25 K W-1 ( 1 voter )
9.09%(D) 500 K, 0.5 K W-1 ( 1 voter )

Based On 11 Votes

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53.85%(A) [1̅01](111) ( 7 voters )
38.46%(B) [1̅10](111) ( 5 voters )
0%(C) [101](111̅)
7.69%(D) [011](111̅) ( 1 voter )

Based On 13 Votes

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10%(A) An oversized solute atom would preferentially migrate below the slip plane of an edge dislocation. ( 2 voters )
65%(B) A spherically symmetric point defect can interact with both the hydrostatic and shear stress fields of a dislocation. ( 13 voters )
15%(C) A point defect can locally modify the elastic modulus and thereby can change the interaction energy. ( 3 voters )
10%(D) Vacancies are attracted towards the compressive region of dislocation. ( 2 voters )

Based On 20 Votes

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12.5%(A) D𝐻𝑠𝑜𝑙𝑖𝑑 mix= 0 and D𝐻𝑙𝑖𝑞𝑢𝑖𝑑 = 0 𝑚𝑖𝑥 ( 2 voters )
75%(B) D𝐻mix 𝑠𝑜𝑙𝑖𝑑 ≪ 0 and D𝐻𝑙𝑖𝑞𝑢𝑖𝑑 = 0 𝑚𝑖𝑥 ( 12 voters )
6.25%(C) D𝐻mix 𝑠𝑜𝑙𝑖𝑑 > 0 and D𝐻𝑙𝑖𝑞𝑢𝑖𝑑 = 0 𝑚𝑖𝑥 ( 1 voter )
6.25%(D) D𝐻mix 𝑠𝑜𝑙𝑖𝑑 = 0 and D𝐻𝑙𝑖𝑞𝑢𝑖𝑑 << 0 𝑚𝑖𝑥 ( 1 voter )

Based On 16 Votes

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0%(A) 0
21.74%(B) 1 ( 5 voters )
69.57%(C) 2 ( 16 voters )
8.7%(D) 3 ( 2 voters )

Based On 23 Votes

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6.67%(A) P-4, Q-3, R-2, S-1 ( 1 voter )
6.67%(B) P-2, Q-1, R-3, S-4 ( 1 voter )
86.67%(C) P-2, Q-1, R-4, S-3 ( 13 voters )
0%(D) P-3, Q-2, R-1, S-4

Based On 15 Votes

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10%(A) P-1, Q-2, R-3, S-4 ( 1 voter )
60%(B) P-3, Q-1, R-4, S-2 ( 6 voters )
30%(C) P-3, Q-4, R-1, S-2 ( 3 voters )
0%(D) P-1, Q-4, R-3, S-2

Based On 10 Votes

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66.67%(A) 3 ( 10 voters )
6.67%(B) 1 ( 1 voter )
26.67%(C) 4 ( 4 voters )
0%(D) 6

Based On 15 Votes

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5.88%(A) Roasting ( 5 voters )
84.71%(B) Leaching ( 72 voters )
4.71%(C) Zone refining ( 4 voters )
4.71%(D) Smelting ( 4 voters )

Based On 85 Votes

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65.15%(A) Silicon ( 43 voters )
16.67%(B) Carbon ( 11 voters )
7.58%(C) Manganese ( 5 voters )
10.61%(D) Phosphorus ( 7 voters )

Based On 66 Votes

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0%(A) Concentration versus time plot is a straight line.
61.54%(B) Increase in concentration of reacting species increases the rate of reaction. ( 8 voters )
7.69%(C) Half-life depends on the initial concentration and zero-order rate constant. ( 1 voter )
30.77%(D) Rate of reaction depends on temperature. ( 4 voters )

Based On 13 Votes

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For a zeroth order chemical reaction, which one of the following is FALSE?

**For a zeroth order chemical reaction, which one of the following is FALSE?**

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7.14%(A) Oil > Water > Brine > Air ( 2 voters )
21.43%(B) Brine > Oil > Water > Air ( 6 voters )
57.14%(C) Brine > Water > Oil > Air ( 16 voters )
14.29%(D) Water > Brine > Oil > Air ( 4 voters )

Based On 28 Votes

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13.64%(A) Nickel ( 3 voters )
18.18%(B) Manganese ( 4 voters )
18.18%(C) Carbon ( 4 voters )
50%(D) Silicon ( 11 voters )

Based On 22 Votes

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64%(A) The minimum creep rate is obtained in the primary stage (stage I). ( 16 voters )
16%(B) Creep resistance decreases with decrease in grain size. ( 4 voters )
0%(C) Coble creep occurs via grain boundary diffusion.
20%(D) Nabarro-Herring creep occurs via lattice diffusion. ( 5 voters )

Based On 25 Votes

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7.14%(A) True stress is always higher than the engineering stress. ( 1 voter )
64.29%(B) At the ultimate tensile stress point on the true stress - strain curve, 𝑑 sigma/ d E = 0 𝑑 ( 9 voters )
7.14%(C) Resilience is the area under the elastic region of the engineering stress - strain curve. ( 1 voter )
21.43%(D) Maximum true stress does not correspond to the maximum load. ( 3 voters )

Based On 14 Votes

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4.55%(A) 𝐼𝑓 delta 𝑯𝒎𝒊𝒙= 0, then 𝑎𝐵 < 𝑋𝐵 ( 1 voter )
9.09%(B) 𝐼𝑓 delta Hmix = 0, then 𝑎𝐵 > 𝑋𝐵 ( 2 voters )
9.09%(C) 𝐼𝑓 delta Hmix > 0, then 𝑎𝐵 < 𝑋𝐵 ( 2 voters )
77.27%(D) 𝐼𝑓 delta Hmix< 0, then 𝑎𝐵 < 𝑋𝐵 ( 17 voters )

Based On 22 Votes

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0%(A)
0%(B)
46.67%(C) ( 7 voters )
53.33%(D) ( 8 voters )

Based On 15 Votes

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26.19%(A) Investment casting ( 11 voters )
7.14%(B) Die casting ( 3 voters )
7.14%(C) Squeeze casting ( 3 voters )
59.52%(D) Directional solidification ( 25 voters )

Based On 42 Votes