Question 156General Subjects - Assistant Engineer

The correct answer is C) be controlled by a thermostat to maintain the oil temperature at less than 190°F. In a hydraulic system that is in continuous operation, the fan for the air-cooled heat exchanger should be controlled by a thermostat to maintain the oil temperature below 190°F. This is necessary to prevent the oil from overheating, which can damage the hydraulic components and reduce the system's efficiency. The other options are incorrect because: A) the fan should not run continuously, as that would waste energy; B) the fan should not only come on after the main pump is secured, as the oil can still overheat during operation; and D) is not a complete answer choice.