Metallurgical Engineering Gate 2018 Questions with Answer

Ques 1 GATE 2018

For a laminar flow of a liquid metal over a flat plate, the thicknesses of the velocity and thermal boundary layers are δ_v and δ_t respectively.
Kinematic viscosity (viscosity/density) of liquid metal is significantly lower than its thermal diffusivity [thermal conductivity / (density specific heat)].
Based on this information, pick the correct option.
(Note: The temperature of the liquid metal is different from that of the plate).

Ques 2 GATE 2018

Analysis of a flow phenomenon in a system requires the following variables:
i. Pressure [ M L^-1T^-2]
ii. Velocity of the fluid [L T^-1]
iii. Size of the system [L]
iv. Density of the fluid [M L^-3]
v. Viscosity of the fluid [M L^-1T^-1]
According to Buckingham Pi theorem (dimensional analysis) what is the number of independent DIMENSIONLESS variables needed to describe this system?

Ques 3 GATE 2018

In froth flotation, the primary purpose of adding collectors is to:

Ques 4 GATE 2018

What is the most-abundant anion in a 2CaO.SiO₂ melt?

Ques 5 GATE 2018

Arrange the following in the correct sequence of operations in an integrated steel plant:
i. Basic Oxygen Furnace (BOF)
ii. Blast Furnace (BF)
iii. Ruhrstahl Heraeus Degassing Process (RH)
iv. Ladle Furnace Process (LF)