Question 70Motor Plants - QMED

The correct answer is B) around the cooler. A three-way thermostatic control valve regulates the diesel engine cooling water temperature by passing a portion of the water around the cooler. This allows the valve to control the amount of cooling water flowing through the cooler, thereby maintaining the desired engine operating temperature. The other options are incorrect because: A) Passing the water overboard would not regulate the temperature, as the water would not be recirculated through the engine. C) Passing the water to the expansion tank would not directly regulate the temperature of the water flowing through the engine. D) Passing the water around the engine would not allow the valve to control the amount of cooling water flowing through the cooler.