GATE CH 2018 Paper 1 — page 18

Questions 52–54 of 65. Imported answers require review unless explicitly marked reviewed.

A binary distillation column is designed by McCabe-Thiele method to get a distillate mole fraction of 0.9. The enriching section operating line has an intercept with y-axis at 0.3 mole fraction. The ratio of liquid to vapor molar flow rate in the enriching section is __________ (rounded off to third decimal place).

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A fiberboard sheet (1.5 m × 2.0 m × 15 mm) is being dried by suspending it horizontally in a current of hot, dry air. The edges are insulated so that drying takes place only from the top and bottom surfaces. The wet sheet weighing 16 kg with initial moisture content of 60% loses moisture at a constant rate of 1.25 × 10⁻⁵ kg m⁻² s⁻¹ until the moisture content falls to 30%. All moisture contents are on dry basis. The time required for drying during constant rate period (in hour) is __________ (rounded off to third decimal place).

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Consider the following transfer function:

where, the natural period of oscillation is in min. The amplitude ratio at a frequency of 0.5 rad/min is ____________ (rounded off to second decimal place).

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2018 · Paper 1

Question 42

Question 43

Question 44