GATE XE Food Engineering PYQs & Answers — Page 6

Questions 51–60 of 60. Imported answers require independent review unless marked reviewed.

Topic practice 60 questionsPage 6 of 6

Identify an example of a classical diffusional mass transfer process without involving heat, among the following.

Your answerChoose one option.

Drying of food grains

Carbonation of beverages

Distillation of alcohol

Concentration of fruit juice

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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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A 50% sucrose solution at 20 °C is flowing at a rate of 3.5 m³/h through a pipe with an inside diameter of 0.0475 m and length of 12 m. The viscosity and the density of the solution are 15.43 cp and 1232 kg/m³, respectively. The Reynolds number of the flow is ______.

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In a pineapple juice, fibre particles having mean diameter of 160 μm and density of 1075 kg/m³ are settling by gravity. If the density and viscosity of the juice are 1015 kg/m³ and 0.98 cp, respectively, terminal velocity of the fibre particles is______ mm/s.

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Power consumption in liquid mixing is proportional to ______.

Your answerChoose one option.

Power number × liquid density × (rotational speed)³ × (impeller diameter)⁵

Power number × liquid density × (rotational speed)² × (impeller diameter)³

Liquid density × viscosity of the liquid × (rotational speed)² × (impeller diameter)³

Acceleration due to gravity × liquid density × (rotational speed)³ × (impeller diameter)⁵

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Water flowing at a rate of 1 kg/min is heated from 12 to 80 °C with flue gas supplied at a rate of 3 kg/min. The temperature and specific heat of the flue gas are 180 °C and 1.05 kJ/kg.K, respectively. If specific heat of water is 4.2 kJ/kg.K and the flow is parallel, then the logarithmic mean temperature difference will be ______ °C.

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In an evaporation process, a compressor picks up 0.05 m

air in each revolution and compresses 500 kg of air per minute. If the specific volume of air is 0.9 m

/kg, then the compressor speed is ______ rpm.

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For a soybean oil extraction system, solvent : soy ratio is maintained at 0.5 : 1 (w/w). Original seed contains 18% oil (w/w). If the meal (soy solid) after final desolventization has 0.01 kg oil per kg oil free meal then, the effectiveness of the solvent (kg oil/kg solvent) in the extraction process is ______.

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GATE XE Food Engineering PYQs

Question 17

Question 20

Question 21

Question 22

Question 128

Question 129

Question 130

Question 136

Question 142

Question 143