Engineering Sciences
GATE XE purpose:exam-prep PYQs
Build your understanding with focused practice from past exam papers.
Questions 1291–1300 of 1772. Imported answers require independent review unless marked reviewed.
Question 1
Open questionXE-CMCQ1 markNeeds review
On decreasing the objective aperture size in an optical microscope
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Pilling-Bedworth ratios for oxides of some metals are given in the table.\n\n| Metal | Pilling-Bedworth Ratio |\n|---|---:|\n| Li | 0.57 |\n| Ce | 1.16 |\n| Ta | 2.33 |\n| W | 3.40 |\n\nBased on the criterion of Pilling-Bedworth ratio alone, which one of the following metals will be most protected from high temperature oxidation?
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In NaCl, the substitution of a Na
ion by a Ca
ion would most probably lead toYour answerChoose one option.
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Which one of the following is time-independent?
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Copper is diffused into aluminium at 400 °C for 100 hours to obtain a certain concentration at a given depth. In another experiment conducted at 500 °C, to achieve the same concentration of copper at the same depth, the time required in hours is\n\n(Given: Diffusion coefficients of copper in aluminium at 400 °C and 500 °C are
and
, respectively)Your answerChoose one option.
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If carbon (C) in iron (Fe) is 6 percent by weight, then its atomic percent is approximately\n\n(Given: atomic weight C = 12, Fe = 56)
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GaAs has advantage over silicon when used in integrated circuits at low power because it has
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Glass transition temperature of a polymer can be determined by
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The maximum wavelength of radiation to which Germanium (Ge) is opaque will be\n\n(Given: energy gap of Ge = 0.67 eV, Planck’s constant
, velocity of light
and
)Your answerChoose one option.
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Open questionXE-CMCQ2 marksNeeds review
An alternating copolymer has number-averaged molecular weight of
and degree of polymerization of 2210. If one of the repeat units is ethylene, the other one is\n\n(Given: atomic weight of H = 1, C = 12, F = 19 and Cl = 35.5)Your answerChoose one option.
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