GATE CH 2025 Paper 1 — page 18

Complete GATE CH 2025 Paper 1 overview, original pages and practice · Timed previous-paper practice

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

Paper practice 65 questionsPage 18 of 22

Consider laminar flow of water over a wide flat plate maintained at a uniform temperature of 50 °C as shown in the figure. The freestream velocity and temperature of water are 1.0 m/s (parallel to the plate) and 20 °C, respectively. The distance

from the leading edge, at which the thermal boundary layer thickness

m, is ____ m (rounded off to 1 decimal place).

Diagram for Chemical Engineering question 52

GIVEN: kinematic viscosity:

Prandtl number:

velocity boundary layer thickness:

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An electrical wire of 2 mm diameter and 5 m length is insulated with a plastic layer of thickness 2 mm and thermal conductivity

W/(m K). It is exposed to ambient air at 30 °C. For a current of 5 A, the potential drop across the wire is 2 V. The air-side heat transfer coefficient is 20 W/(m

K). Neglecting the thermal resistance of the wire, the steady state temperature at the wire-insulation interface is ____ °C (rounded off to 1 decimal place).

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A binary

liquid mixture containing 30 mol%

is subjected to differential (Rayleigh) distillation at atmospheric pressure in order to recover 60 mol%

in the distillate. Assuming a constant relative volatility

, the average composition of the collected distillate is ____ mol%

(rounded off to nearest integer).

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2025 · Paper 1

Question 52

Question 53

Question 54