Question 73Motor Plants - QMED

The correct answer is C) 10° to 20°F. The typical temperature increase between the inlet and outlet jacket cooling water of a medium or high-speed diesel engine operating at normal load is 10° to 20°F. This is because the engine's cooling system is designed to remove the excess heat generated by the engine's combustion process, and a temperature increase of 10° to 20°F is considered normal and within the engine's operating parameters. The other options are incorrect because a temperature increase of 1° to 5°F (A) would be too low and unlikely to be sufficient for cooling the engine, while a temperature increase of 50° to 100°F (D) would be excessively high and could indicate a problem with the cooling system or engine operation.