What method is used to find suspected water tube leaks in chillers?

• A. Ultrasonic testing
• B. Hydrostatic (tube) test
• C. Pressure decay test
• D. Thermal imaging

Answer: (B)

The hydrostatic (tube) test is a widely accepted method for detecting suspected water tube leaks in chillers. This technique involves pressurizing the tubes with water to a specified level above the normal operating pressure. By doing this, any leaks can be identified because water will escape through any compromised areas. The test is usually performed when the system is off and allows technicians to observe any loss of pressure, indicating a leak.

In addition, utilizing water for the test minimizes the risks associated with other methods that might involve hazardous materials. The ability to visually inspect the equipment during this test can also assist in identifying more serious issues beyond just leaks.

Other methods such as ultrasonic testing can detect leaks but may not pinpoint the exact location as effectively as a hydrostatic test. Pressure decay tests may also be used but generally apply to enclosed systems rather than specifically targeting water tubes in chillers. Thermal imaging can help in identifying temperature differences across surfaces but is less direct in detecting leaks compared to hydrostatic testing.