GATE XE topic:applied-science PYQs & Answers — Page 131

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Questions 1301–1310 of 1772. Imported answers require independent review unless marked reviewed.

Topic practice 1772 questionsPage 131 of 178

Match the sintering process in column I with the most suitable products in column II.\n\nColumn I\n(P) Solid state sintering\n(Q) Liquid phase sintering\n(R) Spark plasma sintering\n(S) Laser sintering\n\nColumn II\n(1) Carbon nanotube products\n(2) Mixture of Cu and Zn powder products\n(3) Iron powder products\n(4) 3D printed products

Your answerChoose one option.

P-4; Q-1; R-2; S-3

P-3; Q-2; R-1; S-4

P-3; Q-2; R-4; S-1

P-2; Q-3; R-1; S-4

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Which one of the following conditions will NOT favour the separation of impurities in zone refining process?

Your answerChoose one option.

Increase in the gap between solidus and liquidus lines

Increase in the solubility of impurities in solid as compared to that in liquid phase

Agitation of melt

Low cooling rate of melt

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A monochromatic X-ray beam of wavelength 0.154 nm is incident on a cubic crystal having lattice parameter a = 0.245 nm. The diffraction angle (2θ) for the first order reflection from a set of planes represented by the schematic plane below is _____ degrees. (round off to 1 decimal place)

Diagram for Engineering Sciences question 13

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Nickel corrodes at 298 K in a solution of 0.06 M nickel chloride having pH 4. Assuming complete dissociation of nickel chloride, the partial pressure of hydrogen required to stop the corrosion of nickel is _____ atm. (round off to the nearest integer)

(Given: Standard reduction potential of nickel = −0.25 V, Faraday’s constant = 96500 C mol⁻¹, Universal gas constant = 8.314 J K⁻¹ mol⁻¹)

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The potential energy, U(r), of a pair of atoms spaced at a distance r in a solid is given by

The equilibrium distance between the atom pair is _____ nm. (round off to 2 decimal places)

(Given: Constants A = 6 × 10⁻²⁰ J nm³, B = 2.1 × 10⁻²² J nm⁷)

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Tensile true stress—true strain curve for plastic region of an alloy is given by

When true strain is 0.05, the true stress is 350 MPa. For the same alloy, when engineering strain is 0.12 then the engineering stress is _____ MPa. (round off to the nearest integer)

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Box-S has 2 white and 4 black balls and box-T has 5 white and 3 black balls. A ball is drawn at random from the box-S and put in box-T. Subsequently, the probability of drawing a white ball from box-T is _____. (round off to 2 decimal places)

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The zero point energy of an electron in a box of 0.2 nm width is _____ eV. (round off to 1 decimal place)

(Given: Planck’s constant = 6.63 × 10⁻³⁴ J s, electron mass = 9.1 × 10⁻³¹ kg and 1 eV = 1.6 × 10⁻¹⁹ J)

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The de Broglie wavelength of an electron accelerated across a 300 kV potential in an electron microscope is _____ ×10⁻¹² m. Ignore relativistic effects. (round off to 2 decimal places)

(Given: Planck’s constant = 6.63 × 10⁻³⁴ J s, electron rest mass = 9.1 × 10⁻³¹ kg, electron charge = 1.6 × 10⁻¹⁹ C)

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A stress of 17 MPa is applied to a polymer serving as a fastener in a complex assembly. At constant strain the stress drops to 16.6 MPa after 100 hours. The stress on the polymer must remain above 14.5 MPa in order for the assembly to function properly. The expected life of the assembly is _____ hours. (round off to the nearest integer)

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GATE XE topic:applied-science PYQs

Question 11

Question 12

Question 13

Question 14

Question 15

Question 16

Question 17

Question 18

Question 19

Question 20