GATE XL year:2020 PYQs & Answers — Page 13

Questions 121–125 of 125. Imported answers require independent review unless marked reviewed.

Which among the given options correctly explains the nature of the microbial culture represented by lines 1, 2 and 3 in the following figure?

Your answerChoose one option.

Germination of spores

Homogeneous population

Mixed population of spores and vegetative cells

Homogeneous population

Mixed population of heat sensitive and heat resistant microbes

Germination of spores

Composite population

Spores activated by short exposure to heat

Thermo sensitive and thermo resistant microbes

Mixed population

Microorganisms activated by short exposure to heat

Germination of spores

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Match the equation/law in Column I with its application in Column II.

Your answerChoose one option.

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

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

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

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

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Match the absorber used in modified atmosphere packaging and storage in Column I with the scavenger in Column II.

Your answerChoose one option.

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

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

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

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

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During extrusion cooking, food materials are generally subjected to a combination of

Your answerChoose one option.

high shear and low pressure

high temperature and high shear

low shear and high temperature

low shear and low pressure

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An orange juice flowing at 0.80 kg s

enters a counter current double pipe heat exchanger at 20 °C and leaves at 72 °C. Inlet and outlet temperatures of the hot water used as heating medium in the exchanger are 81 °C and 74 °C, respectively. The specific heat of the orange juice is 3.74 kJ kg

and overall heat transfer coefficient is 492 W m

. The heat transfer surface area (round off to 2 decimal places) will be ______ m

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GATE XL year:2020 PYQs

Question 16

Question 17

Question 18

Question 19

Question 20