Using ____ on a suspected leakage area can detect leaks as small as one part per million in a line or cylinder.

Using ____ on a suspected leakage area can detect leaks as small as one part per million in a line or cylinder.

• A. Hydrostatic Testing
• B. A Mass Spectrometer
• C. Soap Suds
• D. A Scleroscope

Answer: (B)

Detecting extremely small leaks relies on using a tracer gas and a detector that can read very tiny concentrations. A mass spectrometer is highly sensitive and selective, capable of quantifying trace amounts of a chosen tracer gas around a suspected leak. By introducing a tracer gas (often helium) and sampling the area, the instrument can detect leaks as small as one part per million, allowing precise pinpointing of the leak in a line or cylinder. Other methods aren’t as sensitive or relevant: hydrostatic testing uses pressure to reveal leaks but doesn’t measure ppm levels; soap-suds visually shows leaks through bubbles but isn’t quantitative at the ppm scale; a scleroscope is used for hardness testing, not leakage.

Detecting extremely small leaks relies on using a tracer gas and a detector that can read very tiny concentrations. A mass spectrometer is highly sensitive and selective, capable of quantifying trace amounts of a chosen tracer gas around a suspected leak. By introducing a tracer gas (often helium) and sampling the area, the instrument can detect leaks as small as one part per million, allowing precise pinpointing of the leak in a line or cylinder. Other methods aren’t as sensitive or relevant: hydrostatic testing uses pressure to reveal leaks but doesn’t measure ppm levels; soap-suds visually shows leaks through bubbles but isn’t quantitative at the ppm scale; a scleroscope is used for hardness testing, not leakage.