Certified Hyperbaric Technologist Practice Test 2026 – Comprehensive Exam Prep

Question: 1 / 625

What happens to the pressure in a scuba cylinder when it is heated in the sun, based on Gay-Lussac's Law?

Decrease; the cylinder is safe

Remain the same; the cylinder is unaffected

Increase; the scuba cylinder may rupture

According to Gay-Lussac's Law, the pressure of a gas is directly proportional to its absolute temperature when the volume is held constant. In the context of a scuba cylinder, when it is heated in the sun, the temperature of the gas inside the cylinder increases. As a result, since the volume of the cylinder does not change, the pressure inside the cylinder also increases.

This elevated pressure could lead to safety hazards, such as the potential for the cylinder to rupture if it exceeds its maximum pressure limit. Therefore, choosing to acknowledge that the pressure increases and that this condition poses a risk aligns with the principles laid out by Gay-Lussac's Law. It's essential for divers and technicians to be aware of this relationship to ensure safety when handling scuba equipment exposed to heat.

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Become unstable; requires immediate attention

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