In leak testing, a drop in temperature indicates which condition?

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Multiple Choice

In leak testing, a drop in temperature indicates which condition?

Explanation:
During leak testing, gas escaping through a leak expands to ambient pressure, and real gases cool as they expand. That rapid expansion pulls heat from the surroundings, so the area near the leak experiences a local temperature drop. Detecting this cooling with sensors or an infrared camera provides a practical sign that gas is leaking, even before a noticeable pressure change is seen. A temperature rise wouldn’t be expected from a leak in this context, and no change would imply no leak.

During leak testing, gas escaping through a leak expands to ambient pressure, and real gases cool as they expand. That rapid expansion pulls heat from the surroundings, so the area near the leak experiences a local temperature drop. Detecting this cooling with sensors or an infrared camera provides a practical sign that gas is leaking, even before a noticeable pressure change is seen. A temperature rise wouldn’t be expected from a leak in this context, and no change would imply no leak.

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