Question

The principle of flash cooling is achieved in _______________

(a) thermoelectric refrigeration

(b) steam-jet refrigeration

(c) evaporative cooling

(d) absorption refrigeration

The question was posed to me in a job interview.

This interesting question is from Heat Transfer Applications topic in chapter Heat Transfer Applications of Food Processing Unit Operations

Answer 1

Correct answer is (b) steam-jet refrigeration

Explanation: Steam-jet refrigeration is employed by chemical agent machines to achieve mechanical refrigeration. Water is used as refrigerant. These are used where chilled water is required where the temperature is more than 5°C. The principle of flash cooling is achieved in steam-jet refrigeration.