GATE XE purpose:exam-prep PYQs & Answers — Page 140

Questions 1391–1400 of 1772. Imported answers require independent review unless marked reviewed.

Topic practice 1772 questionsPage 140 of 178

Match the bioactive compounds in Column I with their botanical source given in Column II.

Column I P Isoflavones Q Resistant starch R Xanthophyll S Resveratrol

Column II 1 Corn 2 Grapes 3 Soybean 4 Plantain (culinary banana)

Your answerChoose one option.

P-2, Q-4, R-1, S-3

P-3, Q-4, R-1, S-2

P-4, Q-1, R-2, S-3

P-4, Q-3, R-2, S-1

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Match the following microbial species in Column I with related disease caused by them as listed in Column II.

Column I P Vibrio sp. Q Shigella sp. R E. coli S Salmonella typhi

Column II 1 Gastroenteritis 2 Typhoid 3 Cholera 4 Bacillary dysentery

Your answerChoose one option.

P-1, Q-3, R-4, S-2

P-2, Q-3, R-4, S-1

P-3, Q-1, R-4, S-2

P-3, Q-4, R-1, S-2

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Buffalo milk having density of 1030 kg m⁻³ is homogenized with a pressure of 30 MPa. Given, acceleration due to gravity as 9.81 m s⁻² and assuming no pressure loss, the velocity (m s⁻¹) of the milk flowing through the homogenizer valve will be ______ (round off to 2 decimal places).

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Potato slices have been dehydrated from an initial solid content of 12% to a final solid content of 94%. If the peeling and other losses are to the tune of 10%, final yield (per cent) of the dried chips per ton of fresh potato taken is ______ (round off to 2 decimal places).

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A mixed fruit beverage with 12 °Brix having specific heat of 4298 J kg⁻¹ K⁻¹ is being heated from 30 °C to 95 °C for pasteurization at a flow rate of 1000 L h⁻¹ in a tubular heat exchanger. Steam at 100 °C is used as heating medium which is converted into condensate at 100 °C. If the density of beverage is 1075 kg m⁻³ and the latent heat of steam at the given temperature is 2257 kJ kg⁻¹, the mass flow rate of steam (kg min⁻¹) is ______ (round off to 2 decimal places).

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Fruit juice was cooled in a tubular heat exchanger from 50 °C to 7 °C using water at 2 °C, which gets heated to 5 °C. Assume, Pr = 0.72, Re = 2000 and thermal conductivity = 0.6 W m⁻¹ °C⁻¹ and no viscous effect. If pipe diameter was 10 cm, the convective heat transfer coefficient (W m⁻² °C⁻¹) is ________ (round off to 1 decimal place).

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Room air is at 40 °C with 60% relative humidity. Saturated vapour pressure of water at 40 °C is 7.375 kPa. Volume of humid air (m³ per kg of dry air) is ____________ (round off to 3 decimal places).

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A shallow-bed horizontal belt type solvent extractor is operating on 0.3 mm thick soybean flakes with 0.5 m bed depth and a forward speed of 0.8 m min⁻¹ with miscella flux rate of 0.25 m min⁻¹. If porosity of the flakes is 60%, the distance between washing nozzle and miscella collecting receptacle (cm) is ____________ (round off to 1 decimal place).

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An extruded snack food is packed in a barrier film having water vapour transmission rate of 0.02 mL m⁻² day⁻¹. Pack surface area is 0.0012 m² per gram of dry food solids, EMC of the food is 6% (d.b.), initial moisture content is 2% (d.b.), critical moisture content is 5% (d.b.) and slope of moisture sorption isotherm is 3.4% (d.b.) per unit water activity (aᵥ). Sealed pack is stored at 30 °C. Assume that the vapor pressure of water at 30 °C is 31.7 torr. Time required for the food to reach the critical moisture content (days) is ________ (round off to 1 decimal place).

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Freezing of 100 mm spherical meat ball with 60% moisture at 35 °C is being done in an air blast freezer maintained at -45 °C. Given, latent heat of fusion for water is 333.2 kJ kg⁻¹, thermal conductivity of meat is 1.5 W m⁻¹ °C⁻¹, convective heat transfer coefficient is 40 W m⁻² °C⁻¹, density of frozen meat is 980 kg m⁻³ and initial freezing temperature of meat ball is -10 °C. Using Plank’s equation, freezing time (h) is ____________ (round off to 2 decimal places).

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GATE XE purpose:exam-prep PYQs

Question 13

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Question 21

Question 22