GATE PI branch:pi PYQs & Answers — Page 61

Questions 601–610 of 650. Imported answers require independent review unless marked reviewed.

Topic practice 650 questionsPage 61 of 65

Accuracy of a measuring instrument is expressed as

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true value − measured value

measured value − true value

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The operating characteristic curves of three single sampling plans X, Y and Z with same lot size and acceptance number are shown in the Figure.

Diagram for Production and Industrial Engineering question 17

Considering the above operating characteristic curves, the correct relationship of the plans with respect to sample size is

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sample size of X < sample size of Y < sample size of Z

sample size of X = sample size of Y = sample size of Z

sample size of X > sample size of Y > sample size of Z

sample size of X > sample size of Y < sample size of Z

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In carbon dioxide molding process, the binder used is

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Sodium bentonite

Calcium bentonite

Sodium silicate

Phenol formaldehyde

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A steel wire of 2 mm diameter is to be drawn from a wire of 5 mm diameter. The value of true strain developed is __________ (up to three decimal places).

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In gas tungsten arc welding process, the material coated on pure tungsten electrode to enhance its current carrying capacity is

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Titanium

Manganese

Radium

Thorium

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In powder metallurgy, the process ‘atomization’ refers to a method of

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producing powders

compaction of powders

sintering of powder compacts

blending of metal powders

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The ideal stress-strain behavior for a completely brittle material during tensile testing up to failure is described by

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Diagram for Production and Industrial Engineering question 22

Diagram for Production and Industrial Engineering question 22 (figure 2)

Diagram for Production and Industrial Engineering question 22 (figure 3)

Diagram for Production and Industrial Engineering question 22 (figure 4)

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With reference to Iron-Carbon equilibrium phase diagram, the crystal structure of 0.3% plain carbon steel at 1,100 °C is

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HCP

BCT

BCC

FCC

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is the modulus of elasticity in GPa,

is the shear modulus in GPa and

is the Poisson’s ratio of a linear elastic and isotropic material, the three terms are related as

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A machined surface with standard symbols indicating the surface texture is shown in the Figure. (All dimensions in the Figure are in micrometer).

Diagram for Production and Industrial Engineering question 25

The waviness height (in micrometer) of the surface is

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120

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GATE PI branch:pi PYQs

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