Final answer:
The statement 'the gas is not leaking out, and the cylinder does not change size-at least not significantly as it warms' does not pertain to the engine compartment pre-trip inspection, which deals with observable issues like leaks and belt conditions, not cylinder size changes.
Step-by-step explanation:
Among the statements provided, the one that does not belong to a typical pre-trip inspection of the engine compartment is: the gas is not leaking out, and the cylinder does not change size-at least not significantly as it warms. The pre-trip inspection usually involves checking for leaks, belt integrity, the condition of hoses, and fluid levels. However, the statement about the cylinder not changing size is not relevant, as the inspection focuses on more observable and immediate issues that can be checked visually or through simple tests.
On the other hand, observing the dimming of lights, such as when the refrigerator light dims momentarily or when the passenger compartment light dim during the engine start, is related to electrical system behavior. These examples illustrate how electrical demand can affect lighting intensity, which could be a part of an inspection but would not be associated with the gas not leaking or cylinder size change.