Question

At what temperature does the thermostats fully open?

(a) 36°C

(b) 98°C

(c) 82°C

(d) 42°C

This question was addressed to me by my college director while I was bunking the class.

This intriguing question comes from Cooling System in section Fuel Supply and Cooling System of Farm Machinery

Answer 1

The correct option is (c) 82°C

Explanation: Thermostat valve is a kind of check valve which opens and closes with the effect of temperature. Standard thermostats are designed to start opening at 70°C and they fully open at 82°C.