Question

Statement 1: In a thermocouple, two wires are of different materials and a voltage difference is created due to the conduction of each material at the juncture and this gives us the difference in temperature in both metals and hence the temperature of the liquid.

Statement 2: The zone of slowest heating in a container is called cold point of a container.

(a) True, False

(b) True, True

(c) False, False

(d) False, True

The question was posed to me by my college professor while I was bunking the class.

My question is from Principles of Food Preservation by Canning-3 in section Principles of Food Preservation by Canning and Drying and Principles of Food Concentrates of Food Engineering

Answer 1

The correct choice is (b) True, True

Explanation: In a thermocouple, two wires are of different materials and a voltage difference is created due to the conduction of each material at the juncture and this gives us the difference in temperature in both metals and hence the temperature of the liquid. All points inside a container do not heat up at steady rates. The zone of slowest heating in a container is called a cold point of a container.