Red Seal Plumbing Practice Exam 2026 - Free Red Seal Plumbing Practice Questions and Study Guide

Flow controls on gas piping operate by limiting the flow of gas, thus keeping the operating pressure at a lower level than the supply pressure. This ensures the gas is delivered at the appropriate pressure for safe and efficient use. Option A is incorrect because filters are used to remove particles and impurities from the gas, not control its flow. Option B is incorrect because increasing gas pressure would be dangerous and can result in explosions. Option D is incorrect because while flow controls can measure gas flow, that is not their main function when installed on gas piping. They are primarily used to regulate pressure.