Metallurgical Engineering
GATE MT topic:materials-engineering PYQs
Build your understanding with focused practice from past exam papers.
Questions 541–550 of 650. Imported answers require independent review unless marked reviewed.
Question 11
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At equilibrium, the maximum number of phases in a three-component system at CONSTANT PRESSURE is:
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For a single phase system with K components, the exact differential of Gibbs free energy is given as:
Which one of the following can be derived from the above expression as a Maxwell’s relation?
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For intrinsic Si at room temperature, the electron concentration = the hole concentration =
, and the electron and hole mobilities are 0.1 and 0.2 m
·V
·s
respectively. What is the room temperature electrical conductivity?The charge of an electron is
C.Your answerChoose one option.
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To minimize refractory loss during BOF steel-making, slag is supersaturated with which of the following:
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Which of the following weld processes is NOT suitable for joining in metal sheets?
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Which of the following categories of materials is suitable as a filler for brazing of steel sheets?
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Arrange the following processes in INCREASING magnitude of surface roughness of the cast.
P. Investment casting
Q. Permanent mold casting
R. Pressure die casting
S. Sand casting
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In a Jominy end-quench test of the eutectoid plain-carbon steel, which of the following represents the sequence of microstructures observed from the quenched end of the specimen?
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A long oil pipeline made of steel is suspected to have developed a scale on the inner surface due to corrosion. Which of the following non-destructive techniques is the most suitable for detecting and quantifying such a defect?
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A steel is plastically worked in the temperature range below the nose of the TTT curve and above M
, followed by quenching to produce fine martensite. What is this process called?Your answerChoose one option.
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