GATE XE 2018 Paper 1 — page 51

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

Black pepper is ground from an equivalent particle size of 6 mm to 0.12 mm using a 10 hp motor. Assuming Rittinger’s equation and that 1 hp = 745.7 W, the power (hp) of motor required to fine grind black pepper to 0.08 mm would be ______.(up to two decimal points)

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Green pea (average diameter 0.8 cm) is frozen in a blast freezer operating at -40°C and with a surface heat transfer coefficient of 30 W m^ K^. The thermal conductivity of pea is 2.5 W m^ K^, and latent heat of crystallization is 2.74 x 10^2 kJ kg^. If the freezing point of pea is -1°C and the density is 1160 kg m^, the freezing time in minutes will be ______.(up to two decimal points)

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The rate of heat transfer from a metal plate is 1000 W m^. The surface temperature of the plate is 120°C and ambient temperature is 20°C. The convective heat transfer coefficient (W m^ °C^) using the Newton’s law of cooling will be ______.

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2018 · Paper 1

Question 20

Question 21

Question 22