During a non-volumetric leak test, openings to the tank should be capped to minimize the effects of

During a non-volumetric leak test, openings to the tank should be capped to minimize the effects of

• A. Wind
• B. High water
• C. Evaporation
• D. Temperature

Answer: (A)

In a non-volumetric leak test, maintaining a stable internal pressure is key, because any change in pressure is interpreted as a leak. If openings to the tank are left uncapped, ambient air movement through those openings—especially wind—can push air in or pull it out, altering the internal pressure independently of actual leaks. Capping the openings prevents this wind-driven air exchange, keeping the test measurement accurate. Evaporation, high water around the tank, and temperature can influence readings but are less likely to cause the same direct, rapid pressure changes that wind can induce through open ports during the test.

In a non-volumetric leak test, maintaining a stable internal pressure is key, because any change in pressure is interpreted as a leak. If openings to the tank are left uncapped, ambient air movement through those openings—especially wind—can push air in or pull it out, altering the internal pressure independently of actual leaks. Capping the openings prevents this wind-driven air exchange, keeping the test measurement accurate. Evaporation, high water around the tank, and temperature can influence readings but are less likely to cause the same direct, rapid pressure changes that wind can induce through open ports during the test.