Metallurgical Engineering
2018 · Paper 1
Take it one question at a time. Try an answer, then check your understanding.
Complete GATE MT 2018 Paper 1 overview, original pages and practice · Timed previous-paper practice
Questions 55–57 of 65. Imported answers require review unless explicitly marked reviewed.
Question 45
Open questionMTNAT2 marksNeeds review
The terminal velocity (
) of a spherical inclusion of diameter D = 50 micrometers rise in liquid steel is ______ (in mm s
to two decimal places) Assume Stokes law; i.e., drag force
, where
is the viscosity of steel. Given: Density of liquid steel = 7900 kg m
; Viscosity of liquid steel = 0.0079 Pa s; Density of the inclusion = 2500 kg m
; Acceleration due to gravity = 9.8 m s
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Open questionMTNAT2 marksNeeds review
A single crystal of aluminium is subjected to 10 MPa tensile stress along the [321] crystallographic direction. The resolved shear stress on the
slip system is ______ (in MPa to two decimal places)Log in to check the answer
You can attempt this question now. Sign in to view the answer key, explanations and discussion.Log in to check answerQuestion 47
Open questionMTNAT2 marksNeeds review
If the net magnetic moment of an Fe atom in BCC structure is 2
, then the saturation magnetization of Fe is ______ (kA m
to one decimal place) Given:
; Lattice parameter of BCC iron is 0.287 nm Note: kA is kiloAmperesLog in to check the answer
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