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17 Cards in this Set
- Front
- Back
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What is a physical point in hydraulic system from which small amounts of hydraulic fluid can be obtained for contamination analysis? |
Fluid sampling point |
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Valves conforming to the requirements of what may be used as sampling points? |
MIL-V-81940 |
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The fluid sample should be obtained from a main system return line, pump suction line, or what else? |
System reservoir |
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When reservoir is that configuration in which all system return line fluid does not pass through the reservoir? |
Make up |
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The sampling point should be usable immediately after flight without requiring the use of external what? |
Ground support equipment |
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With reasonable external pre-cleaning and prior self flush of the valve or fitting, the background level attributable to the sample point itself should not exceed what percent of the normally observed particulate level? |
10 |
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The internal porting of the sampling point shall be such that it will not impede the passage of hard particulate matter up to how many microns in diameter? |
500 |
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With normal system operating pressures present, the sample fluid flow rate should be between 100 and 1000 ml per what? |
Minute |
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Samples showing visible water or what shall not be tested? |
Cloudiness |
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Allowing the fluid sample to remain motionless for how many minutes or longer may facilitate the formation of visible droplets if water is present? |
10 |
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What test patches are typical of systems containing normal proportions of common wear materials and external contaminants? |
Gray |
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Do not dispose of test filter patch membrane in ashtrays or other receptacles where the temperature will exceed what? |
250° |
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The maximum acceptable particulate level for naval aircraft is navy standard class 5, and for related SE is navy standard class what? |
3 |
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In organizational level, I level, or NOAP laboratory, fluid samples shall be prepared for testing, and the particle counts shall be performed in accordance with what instructions and procedures given during operator training? |
NAVAIR |
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What is an essential maintenance operation performed whenever a system is found to contain fluid unacceptably contaminated with foreign matter, particulates, liquids and gases or otherwise considered not acceptable for service? |
System decontamination |
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How many basic methods are utilized in decontaminating aircraft hydraulic systems? |
5 |
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What is a service operation in which entrapped air in a closed hydraulic system, pressurized above what psi, becomes compressed into solution? |
Air bleeding |
