Question

Why is thermostat used?

(a) To control the velocity of water

(b) To control the distribution of water to various cylinders

(c) To control the water temperature

(d) To control the pressure of water

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

Enquiry is from Heat Rejection and Cooling in section Nonconventional Engines, Conventional Energy Sources & Cooling System of Automobile Engineering

Answer 1

Correct choice is (c) To control the water temperature

The best I can explain: Thermostat is used to control the water temperature. Whenever the engine is started from cold, the coolant temperature has to be brought to the desired level so that the warmup time is less.