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Get all set of GATE MT (Metallurgy) question papers with solution. Download the pdf of GATE MT 2019 previous year question papers with solution.
True stress – true strain behavior of a metal is given by the flow curve equations = 1750e0.37, where s is in MPa. The true stress at necking (in MPa, rounded off to the nearest integer) is _____.
True stress – true strain behavior of a metal is given by the flow curve equations = 1750e0.37, where s is in MPa. The true stress at necking (in MPa, rounded off to the nearest integer) is _____.
Read lessThe maximum possible reduction (in 𝑚𝑚, rounded off to one decimal place) of a 100 mm thick slab during rolling is _______. Given: The coefficient of friction between roll and the slab is 0.2, and the roll diameter is 200 mm.
The maximum possible reduction (in 𝑚𝑚, rounded off to one decimal place) of a 100 mm thick slab during rolling is _______.
Given: The coefficient of friction between roll and the slab is 0.2, and the roll diameter is 200 mm.
Read lessIf the solid-solid interfacial energy (𝛾𝑆𝑆) is 0.87 𝐽. 𝑚-2 and solid-liquid interfacial energy (𝛾𝑆𝐿) is 0.5 𝐽. m-2, the dihedral angle (𝜙, in degree, rounded off to one decimal place) during sintering is_________. Read more
If the solid-solid interfacial energy (𝛾𝑆𝑆) is 0.87 𝐽. 𝑚-2 and solid-liquid interfacial energy (𝛾𝑆𝐿) is 0.5 𝐽. m-2, the dihedral angle (𝜙, in degree, rounded off to one decimal place) during sintering is_________.
A blast furnace charged with hematite containing 90 wt.% Fe2O3 produces liquid iron with 3.6 wt.% carbon. Coke containing 90 wt.% carbon is charged at a rate of 500 kg per Metric ton of liquid iron produced. The blast furnace ...Read more
A blast furnace charged with hematite containing 90 wt.% Fe2O3 produces liquid iron with 3.6 wt.% carbon. Coke containing 90 wt.% carbon is charged at a rate of 500 kg per Metric ton of liquid iron produced. The blast furnace top gas contains (by volume), 22% CO, 18% CO2, and balance nitrogen. The volume of the blast furnace top gas [in m3 (NTP), rounded off to the nearest integer] is _______.Given: Assume ideal gas behavior, and molar volume of the gas at NTP is 22.4 litre.
Read lessIn sand-mold casting of a metal, it takes 180 seconds for complete solidification of a 27 cm3 cube-shaped casting. All other parameters remaining constant, the total solidification time (in seconds, rounded off to one decimal place) for a cylinder-shaped [radius ...Read more
In sand-mold casting of a metal, it takes 180 seconds for complete solidification of a 27 cm3 cube-shaped casting. All other parameters remaining constant, the total solidification time (in seconds, rounded off to one decimal place) for a cylinder-shaped [radius = 1 cm and height = 6 cm] casting of the same metal, is _______.
Read lessThe critical radius (in nm, rounded off to one decimal place) of nickel nucleus during solidification at 1673 K is _______ .Given: Enthalpy of fusion of nickel = 2.65 × 109 𝐽. 𝑚-3; Liquid-solid interfacial energy = 0.5 𝐽. 𝑚-2, ...Read more
The critical radius (in nm, rounded off to one decimal place) of nickel nucleus during solidification at 1673 K is _______ .Given: Enthalpy of fusion of nickel = 2.65 × 109 𝐽. 𝑚-3; Liquid-solid interfacial energy = 0.5 𝐽. 𝑚-2, and Equilibrium melting temperature of nickel = 1728 K.
Read lessThe equilibrium constant for the following reaction at 300K is C(grpahite) +2H2(g) gives rise to CH4 (g). Given at 300 K delta(H0)= -74,900 J.mol-1; delta(S0)= -80J mol-1 k-1; R= 8.314 J.mol-1 K-1. A. 5.6*106 ...Read more
The equilibrium constant for the following reaction at 300K is C(grpahite) +2H2(g) gives rise to CH4 (g). Given at 300 K delta(H0)= -74,900 J.mol-1; delta(S0)= -80J mol-1 k-1; R= 8.314 J.mol-1 K-1.
A. 5.6*106 B. 3.6*107
C. 4.0*108 D. 7.3*108
A 50 mm (diameter) sphere of solid nickel is oxidized in a gas mixture containing 60% argon and 40% oxygen by volume. The rate of oxidation of nickel is controlled by the rate of transport of oxygen through the concentration ...Read more
A 50 mm (diameter) sphere of solid nickel is oxidized in a gas mixture containing 60% argon and 40% oxygen by volume. The rate of oxidation of nickel is controlled by the rate of transport of oxygen through the concentration boundary layer. The rate of oxidation (in moles of nickel per minute (mol/min), rounded off to two decimal places) is .
Given: Total pressure = 1atm.; Temperature = 1173 K; Concentration of oxygen at the surface of the solid = 0; Boundary layer mass transfer coefficient = 0.03 𝑚. 𝑠−1; Universal gas constant, 𝑅 = 8.205 × 10−5 𝑚3. 𝑎𝑡𝑚. 𝐾−1. 𝑚𝑜𝑙−1 . Assume ideal gas behavior.
Read lessEquilibrium concentration of dissolved nitrogen (in wt.%, rounded off to three decimal places) in pure liquid iron, exposed to atmospheric air at 1873 K, is Given: Sieverts’ law constant as a function of temperature (T; in Kelvin) is log10 K [N] ...Read more
Equilibrium concentration of dissolved nitrogen (in wt.%, rounded off to three decimal places) in pure liquid iron, exposed to atmospheric air at 1873 K, is
Given: Sieverts’ law constant as a function of temperature (T; in Kelvin) is log10 K [N] = [-518/T- 1.063], where 𝐾[N] has the dimension of 𝑎𝑡𝑚-(1/2).
Assume [hN] =[wt.% N] , where [hN] is the activity of nitrogen with respect to 1 wt.% Henrian standard state.
Read lessPressure drop in the granular zone of a blast furnace is 300 mm of water per meter of the bed height. The bed permeability is 0.8 𝑚4. 𝑁-1. 𝑠-1. The volumetric flow rate of gas per unit area through the ...Read more
Pressure drop in the granular zone of a blast furnace is 300 mm of water per meter of the bed height. The bed permeability is 0.8 𝑚4. 𝑁-1. 𝑠-1. The volumetric flow rate of gas per unit area through the bed [in (𝑚3. 𝑠-1). 𝑚-2, rounded off to the nearest integer] is ______ . Assume Darcy’s law is applicable and g = 9.8 𝑚. 𝑠-1. Density of water = 1000 𝑘𝑔. 𝑚-3.
Read less100 Metric tons of copper concentrate containing 21 wt.% Cu is to be processed in 6 months with 25 working days per month and 8 working hours per day. The concentrate is leached by sulphuric acid and electrolyzed in 10 ...Read more
100 Metric tons of copper concentrate containing 21 wt.% Cu is to be processed in 6 months with 25 working days per month and 8 working hours per day. The concentrate is leached by sulphuric acid and electrolyzed in 10 cells arranged in series. The minimum current rating (Ampere per month per cell, rounded off to the nearest integer) is ______.Given: Faraday constant = 96500 𝐶𝑜𝑢𝑙𝑜𝑚𝑏 𝑝𝑒𝑟 𝑔𝑟𝑎𝑚 𝑒𝑞𝑢𝑖𝑣𝑎𝑙𝑒𝑛𝑡. Atomic weight of copper is 63.
Read lessSteady state radial heat conduction through a hollow, infinitely long zirconia cylinder is governed by the following ordinary differential equation: Read more
Steady state radial heat conduction through a hollow, infinitely long zirconia cylinder is governed by the following ordinary differential equation:
Where, T is the temperature and r is the radial distance. The inner surface of the hollow cylinder is maintained at 1473 K and the outer surface at 973 K. The rate of heat loss per unit length through the outer surface of the hollow cylinder (in 𝑊. 𝑚−1, rounded off to the nearest integer) is __________.
Given: Inner radius of cylinder = 0.05 m; outer radius of cylinder = 0.07 m and thermal conductivity of zirconia (k) = 2 𝑊. 𝑚−1. 𝐾−1.
Read lessThe partial pressure of zinc (in torr, rounded off to two decimal places) in equilibrium with liquid lead containing 0.03 mole% zinc at 900 K is__________. Given: Vapour pressure of pure zinc (𝑝°zn ) at 900 K is 0.027 atm. Henry’s ...Read more
The partial pressure of zinc (in torr, rounded off to two decimal places) in equilibrium with liquid lead containing 0.03 mole% zinc at 900 K is__________.
Given: Vapour pressure of pure zinc (𝑝°zn ) at 900 K is 0.027 atm. Henry’s law coefficient (𝛾° zn) for zinc at infinite dilute solution in lead on Raoultian scale is 8.55.
1 𝑡𝑜𝑟𝑟 = 1.316 × 10−3 𝑎𝑡𝑚
Read lessCold working of iron leads to increase in dislocation density from 1010 to 1015 m-2. The associated stored energy ( in MJ m-3, rounded off to one decimal place) is _____. Given : Shear modulus of iron = 82 GPa, burger,s ...Read more
Cold working of iron leads to increase in dislocation density from 1010 to 1015 m-2. The associated stored energy ( in MJ m-3, rounded off to one decimal place) is _____. Given : Shear modulus of iron = 82 GPa, burger,s vector ‾b= a0/2[111] , a0= 0.2856nm.
Read lessA FCC crystal with a lattice parameter of 0.3615 nm is used to measure the wavelength of monochromatic x-rays. The Bragg angle (θ) for the reflection from (111) planes is 21.68°. The wavelength of x-rays (in nm rounded off to ...Read more
A FCC crystal with a lattice parameter of 0.3615 nm is used to measure the wavelength of monochromatic x-rays. The Bragg angle (θ) for the reflection from (111) planes is 21.68°. The wavelength of x-rays (in nm rounded off to three decimal places is )________.
Read lessThe length of internal cracks in the two samples of same glass is measured to be C1= 0.5mm and C2= 2mm. The ratio of (σ1/σ2) of the fracture strength of the two samples is ______.
The length of internal cracks in the two samples of same glass is measured to be C1= 0.5mm and C2= 2mm. The ratio of (σ1/σ2) of the fracture strength of the two samples is ______.
Read lessConsider electrodeposition of copper on a copper electrode from an aqueous solution containing 0.5 × 10−3 𝑚𝑜𝑙. 𝑐𝑚−3 CuSO4. Given: Faraday constant, 𝐹 = 96500 𝐶𝑜𝑢𝑙𝑜𝑚𝑏 𝑝𝑒𝑟 𝑔𝑟𝑎𝑚 𝑒𝑞𝑢𝑖𝑣𝑎𝑙𝑒𝑛𝑡. Assume transport of reactant is rate limiting, and mass transfer coefficient is 10-4 𝑐𝑚. ...Read more
Terminal rise velocity of a spherical shaped solid in a liquid obeys the following functional relationship: U=f(d,W,μ,ρ) where μ is the terminal rise velocity, d is the diameter of the solid, W is the apparent weight of the solid, μ ...Read more
Terminal rise velocity of a spherical shaped solid in a liquid obeys the following functional relationship: U=f(d,W,μ,ρ) where μ is the terminal rise velocity, d is the diameter of the solid, W is the apparent weight of the solid, μ is the viscosity of liquid and ρ is the density of liquid. According to Buckingham Π theorem, the number of independent dimensionless variables needed to describe the phenomenon is_________.
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![GATE MT 2019 Q31. The table (see options below) providing correct information about crystal structure, co-ordination and packing fraction is ______. [Note: FCC: Face centred cubic,BCC: Body centred cubic, DC: Diamond cubic, CN: Coordination number, PF: Packing fraction]](https://askmemetallurgy.com/wp-content/uploads/2020/06/31.png)
