Which leak detection method finds where a leak is, rather than only showing that the system is losing refrigerant?

Refrigeration · EPA 608 Core. The correct answer, and the reasoning behind it.

The refrigeration cycle, refrigerant states and pressures, gauges and leak detection.

The question

Which leak detection method finds where a leak is, rather than only showing that the system is losing refrigerant?

• AWatching the receiver level over time
• BA standing pressure decay test
• CComparing readings against a charging chart
• DBubble solution or an electronic detectorCorrect answer

Why “Bubble solution or an electronic detector” is correct

40 CFR 82.152 lists bubble tests, ultrasonic tests, gas-imaging cameras and leak detection devices as ways to locate leaks. Pressure decay tests, sight glass checks, receiver levels and charging charts show that a system is leaking but not where.

Source: 40 CFR 82.152

Why the other answers are wrong

• Watching the receiver level over time — A falling receiver level shows a loss but not its location.
• A standing pressure decay test — Pressure decay shows a leak exists but does not find it.
• Comparing readings against a charging chart — Charging charts help judge charge, not leak location.

Practice more of this

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