GATE MT 2014 Question Paper With Solution - Askmemetallurgy

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Asked: 3 years agoIn: Physical Metallurgy & Heat treatment

GATE MT 2014 Q.55 A glass fibre reinforced epoxy composite is made with 60 wt.% unidirectional continuous glass fibres. The elastic moduli of the glass fibre and the epoxy matrix are 72.5 and 2.4 GPa, respectively. What is the elastic modulus of this composite along the fibre direction, in GPa? The densities of glass fibre and epoxy are 2.58 g/cm3 and 1.14 g/cm3, respectively ___________.

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Asked: 3 years agoIn: Thermodynamics & Rate Processes

GATE MT 2014 Q53. The specific heat (Cp) of pure iron expressed in J/(mol.K) as a function of temperature T (in K) is given as: Cp = 17.49 + 24.77 × 10^-3 T. What is the change in the enthalpy of pure iron (in J/mol) when it is heated from 25°C to 700°C ?

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Asked: 3 years agoIn: Iron & Steel Making

GATE MT 2014 Q51. The important factors for producing low silicon pig iron in a blast furnace are

Poll Results

3.45%(A) The important factors for producing low silicon pig iron in a blast furnace are ( 3 voters )

13.79%(B) lower temperature and lower basicity ( 12 voters )

68.97%(C) lower temperature and higher basicity ( 60 voters )

13.79%(D) higher temperature and lower basicity ( 12 voters )

Based On 87 Votes

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Asked: 3 years agoIn: Physical Metallurgy & Heat treatment

GATE MT 2014 Q50. Two phases 𝛼𝛼 and 𝛽𝛽 are in thermodynamic equilibrium. If 𝑥𝑥 and 𝑦𝑦 are the only components present in the phases 𝛼𝛼 and 𝛽𝛽 and if 𝜇𝜇𝑖𝑖 𝑗𝑗 represents the chemical potential of component 𝑖𝑖 in phase j, then the condition for equilibrium is:

GATE MT 2014 Q50. Two phases 𝛼𝛼 and 𝛽𝛽 are in thermodynamic equilibrium. If 𝑥𝑥 and 𝑦𝑦 are the only components present in the phases 𝛼𝛼 and 𝛽𝛽 and if 𝜇𝜇𝑖𝑖 𝑗𝑗 represents the chemical potential of component 𝑖𝑖 in phase j, then the condition for equilibrium is:

Poll Results

7.14%(A) ( 1 voter )

14.29%(B) ( 2 voters )

64.29%(C) ( 9 voters )

14.29%(D) ( 2 voters )

Based On 14 Votes

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Asked: 3 years agoIn: Physical Metallurgy & Heat treatment

GATE MT 2014 Q.49 The flow curve of an annealed metal is expressed as 𝜎𝜎 = 200𝜀𝜀0.25 , where sigma is in MPa. If a rod of this metal is subjected to a true strain = 0.3 by extrusion, the ideal plastic work of deformation per unit volume (in MJ/m3) is ______.

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Asked: 3 years agoIn: Physical Metallurgy & Heat treatment

GATE MT 2014 Q.48 The atomic radius of aluminium is 1.431 Å. The interplanar spacing of (111) planes in aluminium, in Å, is ______.

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Asked: 3 years agoIn: Physical Metallurgy & Heat treatment

GATE MT 2014 Q47. Match the elements in Group I with their corresponding crystal structures in Group II.

GATE MT 2014 Q47. Match the elements in Group I with their corresponding crystal structures in Group II.

Poll Results

11.11%(A) P-2, Q-1, R-4, S-3 ( 1 voter )

66.67%(B) P-3, Q-4, R-1, S-2 ( 6 voters )

11.11%(C) P-4, Q-2, R-3, S-1 ( 1 voter )

11.11%(D) P-3, Q-4, R-2, S-1 ( 1 voter )

Based On 9 Votes

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Asked: 3 years agoIn: Welding Technology

GATE MT 2014 Q46. Determine the correctness or otherwise of the following Assertion (a) and Reason (r). Assertion (a): During welding of aluminium alloys by the gas tungsten arc welding process, direct current reverse polarity (DCRP) mode is used. Reason (r): DCRP facilitates breaking up of the oxide film on the workpiece surface.

Poll Results

9.09%(A) a is true but r is false ( 2 voters )

0%(B) a is false but r is true ( 0 voters )

86.36%(C) both a and r are true, and r is the reason for a ( 19 voters )

4.55%(D)both a and r are true, but r is not the reason for a ( 1 voter )

Based On 22 Votes

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Asked: 3 years agoIn: Thermodynamics & Rate Processes

GATE MT 2014 Q45. Consider a steady state heat flux across a rectangular slab composed of two layers of equal width as shown in the figure below. The thermal conductivities are in the ratio of 𝑘𝑘2 𝑘𝑘1 = 10. If the first layer experiences a temperature drop (𝑇𝑇1 − 𝑇𝑇2) of 50 K, what is the temperature drop (𝑇𝑇2 − 𝑇𝑇3), in K, across the second layer? _______

GATE MT 2014 Q45. Consider a steady state heat flux across a rectangular slab composed of two layers of equal width as shown in the figure below. The thermal conductivities are in the ratio of 𝑘𝑘2 𝑘𝑘1 = 10. If the first layer experiences a temperature drop (𝑇𝑇1 − 𝑇𝑇2) of 50 K, what is the temperature drop (𝑇𝑇2 − 𝑇𝑇3), in K, across the second layer? _______

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Asked: 3 years agoIn: Physical Metallurgy & Heat treatment

GATE MT 2014 Q.44 Determine the correctness or otherwise of the following Assertion (a) and Reason (r). Assertion (a): Peak aging time for an Al-4 wt.% Cu alloy is indicated by a maximum in the hardness. Reason (r): The maximum volume fraction of the teta precipitates is formed at the peak aging time.

Poll Results

62.5%(A) a is true but r is false ( 5 voters )

0%(B) a is false but r is true ( 0 voters )

37.5%(C) both a and r are true, and r is the reason for a ( 3 voters )

0%((D)both a and r are true, but r is not the reason for a ( 0 voters )

Based On 8 Votes

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Asked: 3 years agoIn: Mineral Processing & Non-ferrous Metallurgy

GATE MT 2014 Q.43 Match the operations listed in Group I with the types of processes listed in Group II.

GATE MT 2014 Q.43 Match the operations listed in Group I with the types of processes listed in Group II.

Poll Results

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

77.27%(B) P-3, Q-1, R-2, S-4 ( 17 voters )

4.55%(C) P-4,Q-2, R-3, S-1 ( 1 voter )

18.18%(D) P-3, Q-1, R-4, S-2 ( 4 voters )

Based On 22 Votes

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Asked: 3 years agoIn: Physical Metallurgy & Heat treatment

GATE MT 2014 Q.42 Match the following strengthening methods (Group I) in metallic alloys with typical mechanisms responsible (Group II) for them.

GATE MT 2014 Q.42 Match the following strengthening methods (Group I) in metallic alloys with typical mechanisms responsible (Group II) for them.

Poll Results

36.36%(A) P-3, Q-4, R-2, S-1 ( 4 voters )

9.09%(B) P-3, Q-2, R-1, S-4 ( 1 voter )

54.55%(C) P-4, Q-3, R-1, S-2 ( 6 voters )

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

Based On 11 Votes

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Asked: 3 years agoIn: Mechanical Metallurgy

GATE MT 2014 Q.41 A rod of a metal with Young’s modulus of 200 GPa is pulled in tension to a stress of 400 MPa. What is the elastic strain (in %) that is recovered, when the rod is completely unloaded?

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Asked: 3 years agoIn: Foundry Technology (Metal Casting)

GATE MT 2014 Q.40 In a sand casting of a rectangular slab, the thickness of the solidified layer after 2 minutes is known to be 3 cm. Based on Chvorinov’s rule, the solidified thickness (in cm) after 4 minutes is _____.

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Asked: 3 years agoIn: Iron & Steel Making

GATE MT 2014 Q.39 Determine the correctness or otherwise of the following Assertion(a) and Reason (r): Assertion (a): Deoxidation and decarburisation of liquid steel are done by vacuum treatment process. Reason (r): Decreased partial pressure of CO(g) promotes deoxidation and decarburisation.

Poll Results

20%(A) a is false but r is true ( 2 voters )

10%(B) a is true but r is false ( 1 voter )

10%(C) a is true and r is also true, but r is not the reason for a ( 1 voter )

60%(D) a is true and r is also true, and r is the reason for a ( 6 voters )

Based On 10 Votes

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Asked: 3 years agoIn: Mechanical Metallurgy

GATE MT 2014 Q.38 A body starts yielding when it is subjected to a stress state with principal stresses of 250 MPa, 50 MPa and 50 MPa. What is the yield strength of the material, in MPa, if Tresca yield criterion is obeyed?

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Asked: 3 years agoIn: Thermodynamics & Rate Processes

GATE MT 2014 Q.37 Assume that Sievert’s law holds for solubility of hydrogen dissolved in a thin metal foil. If the partial pressure of hydrogen in contact with the foil is increased by a factor of 4, the solubility increases by a factor of _____.

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Asked: 3 years agoIn: Physical Metallurgy & Heat treatment

GATE MT 2014 Q.36 What is the hydrostatic stress for the state of stress represented by ij given below?

2014 36

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Asked: 3 years agoIn: Physical Metallurgy & Heat treatment

GATE MT 2014 Q.35 Match the alloy names listed in Group I with the main elements present in them listed in Group II.

2014 35

Poll Results

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

16.67%(B) P-3,Q-4,R-1,S-2 ( 1 voter )

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

83.33%(D) P-4,Q-3,R-1,S-2 ( 5 voters )

Based On 6 Votes

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Asked: 3 years agoIn: Mineral Processing & Non-ferrous Metallurgy

GATE MT 2014 Q.34 An electrolytic refining cell for copper consists of an alloy with activity of copper aCu = 0.8 as the anode, and pure copper as the cathode. What is the absolute value of the cell potential (in millivolts) at 25°C, given that copper is divalent? Faraday constant is 96500 C/mol and the universal gas constant is 8.314 J/(mol.K).

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Asked: 3 years agoIn: Thermodynamics & Rate Processes

GATE MT 2014 Q.33 What is the theoretical requirement of air (in m3 at STP) for the complete combustion of 100 m3 (at STP) of a fuel consisting of pure CH4? Assume that air contains 21 vol.% of oxygen.

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Asked: 3 years agoIn: Mineral Processing & Non-ferrous Metallurgy

GATE MT 2014 Q.32 Match the types of corrosion in Group I with their examples in Group II.

2014 32

Poll Results

23.08%(A) P-4,Q-1,R-2,S-3 ( 3 voters )

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

61.54%(C) P-3,Q-4,R-1,S-2 ( 8 voters )

15.38%(D) P-4,Q-2,R-3,S-1 ( 2 voters )

Based On 13 Votes

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Asked: 3 years agoIn: Physical Metallurgy & Heat treatment

GATE T 2014 Q.31 Dissociation of a dislocation into two partials in an FCC metal is given by the following equation. On which plane do these two partial dislocations lie?

2014 31

Poll Results

0%(A) ( 0 voters )

20%(B) ( 1 voter )

20%(C) ( 1 voter )

60%(D) ( 3 voters )

Based On 5 Votes

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Asked: 3 years agoIn: Physical Metallurgy & Heat treatment

GATE MT 2014 Q.30 Two Cu-Ni alloys, one with 47 wt.% Ni and the other with 53 wt.% Ni, are kept in separate crucibles and are allowed to equilibrate at the same temperature T1 between the liquidus and the solidus. The two alloys have

Poll Results

13.33%(A) the same weight fraction of the liquid but the liquid compositions are different. ( 6 voters )

60%(B) the same composition of the liquid but the weight fractions of the liquid are different. ( 27 voters )

20%(C) the same weight fractions of the liquid and the solid. ( 9 voters )

6.67%(D) different compositions and weight fractions of the liquid. ( 3 voters )

Based On 45 Votes

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Asked: 3 years agoIn: Thermodynamics & Rate Processes

GATE MT 2014 Q.29 The activity coefficient of Q in a liquid Q-R alloy is represented by the following equation at a given temperature. ln 𝛾𝛾𝑄𝑄 = 0.6𝜕𝜕2 − 0.2𝜕𝜕3.What is the activity of Q in an alloy of composition 𝜕𝜕𝑅𝑅 = 0.6 at the same temperature?

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