GATE CH 2017 Paper 1 — page 12

Questions 34–36 of 65. Imported answers require review unless explicitly marked reviewed.

The vapour pressure of a pure substance at a temperature

is 30 bar. The actual and ideal gas values of

for the saturated vapour at this temperature

and 30 bar are 7.0 and 7.7, respectively. Here,

is the molar Gibbs free energy and

is the universal gas constant. The fugacity of the saturated liquid at these conditions, rounded to 1 decimal place, is ________ bar.

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Oil is being delivered at a steady flowrate through a circular pipe of radius

m and length 10 m. The pressure drop across the pipe is 500 Pa. The shear stress at the pipe wall, rounded to 2 decimal places, is __________ Pa.

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The following table provides four sets of Fanning friction factor data, for different values of Reynolds number (

) and roughness factor

Which of the above sets of friction factor data is correct?

Your answerChoose one option.

Set I

Set II

Set III

Set IV

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2017 · Paper 1