Question

Which of the following is called as cold pasteurization?

(a) Freeze drying

(b) Heating under low pressure

(c) Irradiation

(d) Heating at low temperature

I got this question during a job interview.

My question is based upon Heat Transfer Applications topic in portion Heat Transfer Applications of Food Processing Unit Operations

Answer 1

Right answer is (c) Irradiation

The best I can explain: The irradiation is also known as cold pasteurization as it destroys the foodborne disease caused by pathogenic microorganisms and parasites. Unlike pasteurization, this method does not use any heat in the process instead uses the high energy rays to kill the microbes.