Production and Industrial Engineering
2026 · Paper 1
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Complete GATE PI 2026 Paper 1 overview, original pages and practice · Timed previous-paper practice
Questions 46–48 of 65. Imported answers require review unless explicitly marked reviewed.
Question 46
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In a rolling operation, a 200 mm wide strip of 23 mm thickness needs to be reduced to 20 mm in a single pass. The roll diameter is 200 mm. Four lubricants P, Q, R, and S with coefficient of friction 0.05, 0.1, 0.2, and 0.25, respectively, are available for use at the roll-strip interface. Assume that the strip width remains constant throughout the process.
Which ONE or MORE among the following lubricants will enable the rolling process to achieve the desired final thickness of the strip in a single pass?
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In the theory of orthogonal machining, assuming that the shear plane will take up an angle that minimizes energy, the shear angle can be shown to be
where
is the shear angle,
the rake angle, and
the friction angle.Which ONE or MORE among the following is/are TRUE?
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Which ONE or MORE among the following homogeneous representations in robots involve(s) rotation about Y-axis by an angle
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