GATE PI 2021 Paper 1 — page 11

Questions 31–33 of 65. Imported answers require review unless explicitly marked reviewed.

A 150 mm wide polyamide flat belt is transmitting 15 kW power through a belt-pulley system. The driving pulley of 150 mm pitch diameter is rotating at 200 RPM. If

is the belt tension on high tension side, and

is the belt tension on low tension side, then the difference in belt tensions

in N is ____________. [round off to one decimal place]

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Heat is being removed from a refrigerator at a rate of 300 kJ/min to maintain its inside temperature at 2 °C. If the input power to the refrigerator is 2 kW, the coefficient of performance of the refrigerator is ____________. [round off to one decimal place]

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In an ideal Otto cycle, 800 kJ/kg is transferred to air during the constant volume heat addition process and 381 kJ/kg is removed during the constant volume heat rejection process. The thermal efficiency in % of the cycle is ____________. [round off to one decimal place]

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2021 · Paper 1

Question 21

Question 22

Question 23