List of top Metallurgical Engineering Questions asked in GATE MT

Match the components in Column I with corresponding manufacturing processes in Column II.
Column I
(P) Crank shaft
(Q) Machine bed
(R) Automobile brake pad
(S) Beverage can
Column II
(1) Sheet metal forming
(2) Forging
(3) Casting
(4) Powder metallurgy

Match the transport processes in Column I with the relationships in Column II.
Column I
(P) Molecular momentum transport
(Q) Molecular mass transport
(R) Molecular energy transport
(S) Radiation energy transport
Column II
(1) Stefan-Boltzmann law
(2) Newton's law of viscosity
(3) Fick's law
(4) Fourier law

For supersonic O\(_2\) jet in basic oxygen furnace steelmaking, choose the correct combination from the following:
(1) Converging-diverging nozzle
(2) Diverging-converging nozzle
(3) O\(_2\) velocity greater than sound velocity at nozzle throat (Mach number > 1)
(4) O\(_2\) velocity equal to sound velocity at nozzle throat (Mach number = 1)
(5) Exit O\(_2\) jet pressure \(\ge\) atmospheric pressure
(6) Exit O\(_2\) jet pressure \(<\) atmospheric pressure

The non-destructive testing technique(s) for detecting internal defects in a steel component is/are

The condition(s) for high degree of mutual substitutional solid solubility for two metals is/are

A liquid of density 900 kg m\(^{-3}\) is flowing over a flat plate with a free stream velocity of 0.1 m s\(^{-1}\). The laminar boundary layer thickness at a distance of 0.2 m from the leading edge of the plate is 0.007 m. The viscosity of the liquid in centipoise is ................... (round off to 2 decimal places).
Given: 1 centipoise = 10\(^{-3}\) kg m\(^{-1}\)s\(^{-1}\)

The rate constant of a reaction at 400 K is three times the value at 300 K. The activation energy of the reaction in kJ mol\(^{-1}\) is ................... (round off to 1 decimal place).
Given: Universal gas constant, R = 8.314 J mol\(^{-1}\)K\(^{-1}\)

Which of the following is/are responsible for reducing the high cycle fatigue life of a component?

When cracks propagate in a brittle material, the following option(s) is/are correct

Match the defects in Column I with corresponding metal forming techniques in Column II.
Column I
(P) Cold shut
(Q) Zipper breaks
(R) Stretcher strains
(S) Center burst
Column II
(1) Rolling
(2) Sheet metal forming
(3) Drawing
(4) Forging

In rolling, the point on the surface of contact between roll and sheet where surface velocity of the roll is equal to velocity of the sheet is referred as

Among the following options, a process for liquid-liquid separation is

The most effective concentration step for sulfide ores is

The gas distribution in a blast furnace is controlled by the shape of

Magnitude of Burgers vector of the dislocation resulting from reaction of dislocations with Burgers vectors \( \frac{a}{2}[101] \) and \( \frac{a}{2}[0\bar{1}\bar{1}] \) is

Diamond has low

For self-diffusion in polycrystalline copper with a lattice diffusion coefficient D\(_L\), grain boundary diffusion coefficient D\(_{GB}\), and surface diffusion coefficient D\(_S\), the correct relationship is

For laminar fluid flow through a smooth circular tube, the relation between friction factor (\(f\)) and Reynolds number (\(Re\)) is