TFD Basic Hose Practice Test

How do you check for leaks after charging a line?

Observe Couplings for Moisture and Listen for Hissing; Verify Pressure on the Gauge Just Look at the Gauge Shake the Hose Check at the Nozzle Only

Correct Answer:

Observe Couplings for Moisture and Listen for Hissing; Verify Pressure on the Gauge

Explanation:

Determining leaks after charging a line relies on three cues: visually inspect the couplings for moisture, listen for a hissing sound as air escapes, and verify that the pressure on the gauge stays at the intended level. Moisture around a connection shows a water leak at that joint, the hiss reveals air escaping from a leak anywhere along the hose or fittings, and a stable gauge reading confirms the line is maintaining pressure—if the pressure drops, there’s a leak or loose connection somewhere. Relying only on the gauge can miss small leaks, shaking the hose isn’t a reliable or safe diagnostic, and checking just at the nozzle leaves leaks elsewhere undetected.

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