GATE XE 2022 Paper 1 — page 51

Complete GATE XE 2022 Paper 1 overview, original pages and practice · Timed previous-paper practice

Questions 151–153 of 175. Imported answers require review unless explicitly marked reviewed.

Paper practice 175 questionsPage 51 of 59

In a dairy processing plant, milk enters a 30 m long and 2 cm diameter tube at 60 °C and leaves at 57 °C. The total heat loss over the tube length is 381.5 W. The specific heat capacity, density, and viscosity of milk are 3.85 kJ kg⁻¹ K⁻¹, 1020 kg m⁻³, and 1.20 cP, respectively. The Reynolds number for the flow is ______ (round off to the nearest integer).

Given: π = 3.14

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Apple juice flows through a steel pipe having thermal conductivity of 50 W m⁻¹ K⁻¹. The outer surface of pipe is exposed to ambient environment. The inside diameter and thickness of the pipe are 3 cm and 1.5 cm, respectively. The overall heat transfer coefficient based on inside area is 25 W m⁻² K⁻¹. If the internal convective heat transfer coefficient is 30 W m⁻² K⁻¹, the external convective heat transfer coefficient (in W m⁻² K⁻¹) will be ________ (round off to two decimal places).

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The dry bulb temperature and relative humidity of air inside a storage chamber are 37 °C and 50%, respectively. The saturation pressure of water vapour at 37 °C and barometric pressure are 6.28 kPa and 101.32 kPa, respectively. The humidity ratio of air inside the chamber is ______ kg water (kg dry air)⁻¹ (round off to three decimal places).

Given: Molecular weight of water vapour and dry air are 18.02 g mol⁻¹ and 28.97 g mol⁻¹, respectively.

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2022 · Paper 1

Question 151

Question 152

Question 153