GATE CH 2018 Paper 1 — page 16

Complete GATE CH 2018 Paper 1 overview, original pages and practice · Timed previous-paper practice

Questions 46–48 of 65. Imported answers require review unless explicitly marked reviewed.

Paper practice 65 questionsPage 16 of 22

Vapour bubbles are formed in the nucleate boiling regime at a frequency of 10 bubbles per second per nucleation site. There are 100 nucleation sites per m² of heating area. The latent heat of vaporization and the density of vapour under the operating condition are 1000 kJ/kg and 1 kg/m³ respectively. The diameter of each bubble is 10⁻³ m. Assume that the entire heat supplied is used for vapour generation. The heat flux (in Watt per m² of heating area) is ______________ (rounded off to third decimal place).

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Under isothermal condition, a vertical tube of length L = 100 m contains a gas of molecular weight equal to 60. The pressure and temperature at the top of the tube are 100 kPa and 25 °C respectively. Consider the universal gas constant and acceleration due to gravity as 8.314 J mol⁻¹ K⁻¹ and 9.81 m s⁻² respectively. If the gas is ideal, the pressure (in kPa) at the bottom of the tube will be __________ (rounded off to third decimal place).

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At a shear rate of 10 s⁻¹, the apparent viscosity of a non-Newtonian liquid was found to be 1 Pa s. At a shear rate of 100 s⁻¹, the apparent viscosity of the same liquid was found to be 0.5 Pa s. If the liquid flows power law behavior, the apparent viscosity (in Pa s) at a shear stress of 10 N m⁻² is __________ (rounded off to two decimal place).

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2018 · Paper 1

Question 36

Question 37

Question 38