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Askmemetallurgy Official

Asked: February 25, 2022In: Thermodynamics & Rate Processes

GATE MT 2022 Q33.

The emf of the cell Au-Pb(liquid) PbCl2-KCl(liquid) Cl2(gas, 0.5 atm), C(graphite) is 1.2327 V at 873 K. Activity of Pb in the Au-Pb alloy is 0.72 and the activity of PbCl2 in the electrolyte is 0.18. The standard Gibbs energy of formation ...Read more

The emf of the cell

Au-Pb(liquid) PbCl2-KCl(liquid) Cl2(gas, 0.5 atm), C(graphite)

is 1.2327 V at 873 K. Activity of Pb in the Au-Pb alloy is 0.72 and the activity of PbCl2 in the electrolyte is 0.18. The standard Gibbs energy of formation of PbCl2(liquid) at 873 K is kJmol^1 (round off to 1 decimal place). Given: R = 8.314 JK1mol1 and F = 96500 Cmol1.

Poll

Askmemetallurgy Official

Asked: February 25, 2022In: Thermodynamics & Rate Processes

GATE MT 2022 Q29. A non-rotating smooth solid spherical object is fixed in the stream of an inviscid incompressible fluid of density 𝜌 (see figure). The flow is horizontal, slow, steady, and fully developed far from the object as shown by the streamline arrows near point O. Which of the following statement(s) is(are) TRUE?

Poll Results

16.67% (A) The velocity of the fluid at the point A is zero ( 1 voter )

50% (B) 𝟐 The fluid pressure at the point A exceeds that at point O by the amount q𝒗 , 2 where 𝒗 is the fluid velocity at point O ( 3 voters )

16.67% (C) Fluid moving precisely along OA will turn perpendicular to OA to circumvent the object ( 1 voter )

16.67% (D) On each side of the central streamline OA, the flow will be deflected round the object ( 1 voter )

Based On 6 Votes

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Askmemetallurgy Official

Asked: February 25, 2022In: Welding Technology

GATE MT 2022 Q28. Which of the following parameter(s) influence(s) the melting rate of the consumable wire in a gas metal arc welding process?

Poll Results

4.76% (A) Stick-out length ( 1 voter )

23.81% (B) Welding speed ( 5 voters )

57.14% (C) Welding current ( 12 voters )

14.29% (D) Diameter of the consumable wire ( 3 voters )

Based On 21 Votes

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Askmemetallurgy Official

Asked: February 25, 2022In: Physical Metallurgy & Heat treatment

GATE MT 2022 Q24. Figures P, Q, R and S schematically show the atomic dipole moments in the absence of external magnetic field. Which one of the following is the correct mapping of nature of magnetism to atomic dipole moments?

Poll Results

0% (A) P- Diamagnetism, Q-Antiferromagnetism, R - Paramagnetism, S - Ferromagnetism

80%(B) P – Ferromagnetism, Q - Antiferromagnetism, R – Diamagnetism, S - Paramagnetism ( 4 voters )

0%(C) P – Paramagnetism, Q – Ferromagnetism, R – Diamagnetism, S - Antiferromagnetism

20%(D) P – Ferromagnetism, Q – Diamagnetism, R – Antiferromagnetism, S- Paramagnetism ( 1 voter )

Based On 5 Votes

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Askmemetallurgy Official

Asked: February 25, 2022In: Mineral Processing & Non-ferrous Metallurgy

GATE MT 2022 Q23. Match the following mineral processing operations (Column I) with the corresponding physical principles (Column II)

Poll Results

100% (A) P - 2, Q - 4, R - 1, S - 3 ( 2 voters )

0% (B) P - 2, Q - 3, R - 1, S - 4

0% (C) P - 3, Q - 1, R - 4, S - 2

0% (D) P - 1, Q - 4, R - 2, S - 3

Based On 2 Votes

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22 23

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Askmemetallurgy Official

Asked: February 25, 2022In: Mechanical Metallurgy

GATE MT 2022 Q21. Given the strain rate (𝜖̇), dislocation density (𝜌), dislocation velocity (𝑣), which of the following relationship(s) is(are) correct? Assume that Orowan equation for plastic flow due to the dislocation movement is obeyed.

Poll Results

0% (A) 𝜖̇ ∝ 𝑣2

50% (B) 𝜖̇ ∝ 𝑣 ( 2 voters )

25% (C) 𝜖̇ ∝ 𝜌2 ( 1 voter )

25% (D) 𝜖̇ ∝ 𝜌 ( 1 voter )

Based On 4 Votes

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Askmemetallurgy Official

Asked: February 25, 2022In: Physical Metallurgy & Heat treatment

GATE MT 2022 Q20. While designing a material for high temperature application, which of the following characteristic(s)/attribute(s) is(are) desirable for achieving better creep resistance?

Poll Results

12.5% (A) Fine grain size ( 2 voters )

37.5% (B) FCC crystal structure ( 6 voters )

37.5% (C) High melting point ( 6 voters )

12.5% (D) Cold worked microstructure ( 2 voters )

Based On 16 Votes

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Poll

Askmemetallurgy Official

Asked: February 25, 2022In: Iron & Steel Making

GATE MT 2022 Q19. Identify the correct statement(s) with respect to the role of nickel as an alloying element in steels.

Poll Results

0% (A) It increases the Ms temperature

78.57% (B) It is an austenite stabiliser ( 11 voters )

14.29% (C) It decreases the Ms temperature ( 2 voters )

7.14% (D) It is a carbide former ( 1 voter )

Based On 14 Votes

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Poll

Askmemetallurgy Official

Asked: February 25, 2022In: Foundry Technology (Metal Casting)

GATE MT 2022 Q18. In continuous casting of steel, mould flux is used for _______.

Poll Results

45.83% (A) lubrication ( 11 voters )

33.33% (B) reducing heat loss ( 8 voters )

8.33%(C) inclusion control ( 2 voters )

12.5% (D) reducing solidification shrinkage ( 3 voters )

Based On 24 Votes

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Askmemetallurgy Official

Asked: February 25, 2022In: Mechanical Metallurgy

GATE MT 2022 Q17. With reference to the stress intensity factor, find the correct match of nomenclature (Column A) with the mode of deformation applied to the crack (Column B).

Poll Results

100% (A) P- Z, Q - Y, R - X ( 1 voter )

0% (B) P - Z, Q - X, R - Y

0% (C) P - Y, Q - X, R - Z

0% (D) P - Y, Q - Z, R - X

Based On 1 Vote

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Askmemetallurgy Official

Asked: February 25, 2022In: Physical Metallurgy & Heat treatment

GATE MT 2022 Q16. With increase in carbon content (up to 2 mass%) in Fe-C alloy, which one of the following statements is correct with respect to the lattice parameters (c and a) of BCT martensite?

Poll Results

0% (A) Both c and a increase

66.67% (B) c increases but a decreases ( 4 voters )

16.67% (C) c decreases but a increases ( 1 voter )

16.67% (D) Both c and a decrease ( 1 voter )

Based On 6 Votes

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Askmemetallurgy Official

Asked: February 25, 2022In: Mechanical Metallurgy

GATE MT 2022 Q14. For a material that undergoes strain hardening, necking instability occurs during tensile testing when ______ . Given: σ = true stress and ϵ = true strain.

Poll Results

14.29%(A) 𝑑𝜎/𝑑𝜖 = 0 ( 1 voter )

28.57% (B) 𝑑𝜎/ 𝑑𝜖 = ϵ ( 2 voters )

57.14% (C) 𝑑𝜎 / 𝑑𝜖 = σ ( 4 voters )

0% (D) 𝑑𝜎 / 𝑑𝜖 = ∞

Based On 7 Votes

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Askmemetallurgy Official

Asked: February 25, 2022In: Foundry Technology (Metal Casting)

GATE MT 2022 Q12. In green sand moulding, the casting defect resulting from the displacement of mould cavity by an oversized core is known as

Poll Results

36.36% (A) Crush ( 4 voters )

9.09% (B) Hot tear ( 1 voter )

9.09% (C) Blow ( 1 voter )

45.45% (D) Fin ( 5 voters )

Based On 11 Votes

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Askmemetallurgy Official

Asked: February 25, 2022In: Physical Metallurgy & Heat treatment

GATE MT 2022 Q11. The CCT diagram of a eutectoid steel with a superimposed cooling curve is shown in the figure. The microstructure at room temperature (RT) after this heat treatment is _______.

Poll Results

25% (A) pearlite only ( 1 voter )

0% (B) pearlite + retained austenite

0% (C) martensite only

75% (D) pearlite + martensite ( 3 voters )

Based On 4 Votes

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2022 11

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Askmemetallurgy Official

Asked: February 24, 2022In: Physical Metallurgy & Heat treatment

GATE MT 2022 Q9. Match the nature of bonding (Column I) with material (Column II)

Poll Results

0% (A) P – 4, Q – 3, R – 2, S – 1

0% (B) P – 2, Q – 1, R – 3, S – 4

0% (C) P – 3, Q – 1, R – 4, S – 2

100% (D) P – 3, Q – 1, R – 2, S – 4 ( 9 voters )

Based On 9 Votes

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GATE MT 2022 Q9. Match the nature of bonding (Column I) with material (Column II)

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Askmemetallurgy Official

Asked: February 24, 2022In: Thermodynamics & Rate Processes

GATE MT 2022 Q7

Poll Results

100% (A) Reynolds number ( 7 voters )

0% (B) Schmidt number

0% (C) Biot number

0% (D) Prandtl number

Based On 7 Votes

In fluid flow, the dimensionless number that describes the transition from laminar to turbulent flow is

Poll

Askmemetallurgy Official

Asked: February 24, 2022In: Metal Working (Forming)

GATE MT 2022 Q6

Poll Results

0% (A) zero

10% (B) half the velocity of the sheet ( 1 voter )

20% (C) twice the velocity of the sheet ( 2 voters )

70% (D) equal to the velocity of the sheet ( 7 voters )

Based On 10 Votes

Neutral point in rolling is defined as the point along the surface of contact between the roll and the sheet, where the surface velocity of the roll is

Poll

Askmemetallurgy Official

Asked: February 24, 2022In: DT & NDT

GATE MT 2022 Q4

Poll Results

85.71% (A) 111, 200, 220, 311 ( 6 voters )

0% (B) 110, 200, 211, 220

14.29% (B) 110, 200, 211, 220 ( 1 voter )

0% (D) 111, 200, 311, 220

Based On 7 Votes

The sequence of peaks corresponding to the planes (in the order of increasing 2𝜃) observed in the X-ray

Poll

Askmemetallurgy Official

Asked: February 24, 2022In: Mineral Processing & Non-ferrous Metallurgy

GATE MT 2022 Q2

Poll Results

12.5%(A) smelting reduction of TiO2 ( 1 voter )

0%(B) thermal dissociation of TiH2

87.5%(C) reduction of TiCl4 by Mg ( 7 voters )

0%(D) reduction of TiO2 by H2

Based On 8 Votes

Titanium is produced commercially by

Poll

xavi

Asked: November 27, 2021In: Iron & Steel Making

In a good rimming steel

Poll Results

48.28%A. both carbon and silicon should be lower ( 14 voters )

10.34%B. silicon should be low, but carbon should be higher ( 3 voters )

10.34%C. both carbon and silicon should be higher ( 3 voters )

6.9%D. silicon should be high, but carbon should be lower ( 2 voters )

Based On 29 Votes

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Dhaval dave

Asked: July 6, 2021In: Uncategorised

how can we calculate melt loss in aluminium recycling?

Poll Results

50%i don't know ( 2 voters )

50%i don't know ( 2 voters )

Based On 4 Votes

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digbijaya igitPlatinum

Asked: June 26, 2021In: Mechanical Metallurgy

Q)

Poll Results

23.33%A ( 7 voters )

16.67%B ( 5 voters )

46.67%C ( 14 voters )

13.33%D ( 4 voters )

Based On 30 Votes

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Poll

Askmemetallurgy Official

Asked: June 16, 2021In: Mineral Processing & Non-ferrous Metallurgy

Which is the most abundant ferrous metal present in the earth’s crust

Poll Results

37.04%Aluminium ( 30 voters )

58.02%Iron ( 47 voters )

3.7%Nickel ( 3 voters )

1.23%Cobalt ( 1 voter )

Based On 81 Votes

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Askmemetallurgy Official

Asked: March 31, 2021In: Iron & Steel Making

GATE MT 2021 Q36. A blast furnace uses hematite ore with 80% Fe2O3 and 20% gangue materials. It uses 600 kg coke per ton of hot metal. The coke contains 85% C and 15% ash. The composition of hot metal is 95.5% Fe and 4.5% C. The weight of iron ore used and slag produced per ton of hot metal respectively, are: Given: Atomic weight: O = 16, C = 12, N = 14, Fe = 56 All the compositions are in wt.%. 1 ton = 1000 kgAssume that the gangue materials of the ore and ash content of coke form slag while Fe2O3 in the ore is consumed in making hot metal.

Poll Results

66.22%(A) 1705 kg, 431 kg ( 49 voters )

6.76%(B) 2131 kg, 546 kg ( 5 voters )

22.97%(C) 1705 kg, 331 kg ( 17 voters )

4.05%(D) 1500 kg, 431 kg ( 3 voters )

Based On 74 Votes

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Askmemetallurgy Official

Asked: March 6, 2021In: Iron & Steel Making

GATE MT 2021 Q35. Match the terms (in Column I) with the unit process (in Column II)

Poll Results

70.59%(A) P-2, Q-1, R-4, S-3 ( 24 voters )

5.88%(B) P-4, Q-1, R-2, S-3 ( 2 voters )

11.76%(C) P-4, Q-3, R-1, S-2 ( 4 voters )

11.76%(D) P-2, Q-3, R-4, S-1 ( 4 voters )

Based On 34 Votes

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2021 35

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