FAA AMT (Aviation Maintenance Technician) Airframe Practice Exam

Question: 1 / 1030

Components containing phosphate ester-base hydraulic fluid may be cleaned with

Water

Stoddard solvent

Components containing phosphate ester-base hydraulic fluid may be cleaned with Stoddard solvent because this type of solvent is compatible with phosphate ester-base hydraulic fluids and will effectively remove any contamination without causing damage to the components. Water, bleach solution, and engine oil are not suitable for cleaning components containing phosphate ester-base hydraulic fluid as they may not effectively remove the contamination or could even cause damage to the components.

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Bleach solution

Engine oil

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