GATE MT format:nat PYQs & Answers — Page 8

Questions 71–80 of 232. Imported answers require independent review unless marked reviewed.

Topic practice 232 questionsPage 8 of 24

Maximum number of phases that can be in equilibrium for a 5-component system at constant temperature and pressure is __________ (in integer).

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A liquid of density

is flowing over a flat plate with a free stream velocity of

. The laminar boundary layer thickness at a distance of

from the leading edge of the plate is

. The viscosity of the liquid in centipoise is __________ (round off to 2 decimal places).

Given: 1 centipoise =

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The rate constant of a reaction at 400 K is three times the value at 300 K. The activation energy of the reaction in

is __________ (round off to 1 decimal place).

Given: Universal gas constant, R = 8.314

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The maximum value of function

in the domain

is __________ (round off to nearest integer).

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For the equation

the value of

is __________ (in integer).

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Enthalpy of formation of an A–B regular solution containing 80 atomic percent A is 3.36

. The activity coefficient of A at 500 K for the solution containing 40 atomic percent A is __________ (round off to 1 decimal place).

Given: Universal gas constant, R = 8.314

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A thin plate is loaded in plane stress condition with

The maximum principal stress in

is __________ (round off to nearest integer).

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A chimney as shown in the figure requires to have natural draft (pressure difference between the furnace and the bottom of chimney,

) of

Diagram for Metallurgical Engineering question 57

Given: acceleration due to gravity,

Assume densities of air and flue do not change along the chimney height. Neglect frictional energy loss and kinetic energy difference at the bottom and top of the chimney.

If the density difference between the air and flue is

, the minimum height (

) of the chimney in meters is __________ (round off to nearest integer).

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Two circular surfaces A and B with the values of emissivity

, temperature T, and respective view factors are shown in the figure. Consider heat radiation only between surfaces A and B.

Diagram for Metallurgical Engineering question 58

Given: Stefan-Boltzmann constant,

Net heat flow rate by radiation from surface A in kW is __________ (round off to 1 decimal place).

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Copper ore assaying 10 wt.% Cu is fed to a concentration plant at the rate of 100 tons/h. If the grades of concentrate and tailing are 30 wt.% Cu and 1 wt.% Cu, respectively, the percentage recovery of copper in concentrate is __________ (round off to nearest integer).

Given: 1 ton = 1000 kg

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GATE MT format:nat PYQs

Question 32

Question 33

Question 34

Question 35

Question 54

Question 55

Question 56

Question 57

Question 58

Question 59