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20 Cards in this Set
- Front
- Back
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What is straight mineral oil |
It is the lubricating oil as obtained by fractional distillation of crude oil. It does not have any additives what is ashless dispersant oil 80 oil |
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What is ashless dispersant oil, (AD) |
A mineral lubricating oil containing additives that disperse the contaminants throughout the oil so they will not clump and clog oil passages. There are no ash forming additives in AD oil |
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What is synthetic oil |
A lubricating oil that is made by chemically changing the nature of an oil base to give it the needed characteristics. Synthetic oil is primary oil for turbine engines |
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Is automotive oil suitable for use in aircraft engines |
No, automotive and aviation oil's are formulated for entirely different operating conditions |
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What is meant by multiviscosity oil |
It is a lubricating oil with a viscosity index improver that increases the viscosity of the oil when it is hot and decreases when it is cold |
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What are six functions of the oil in an aircraft engine |
Reduce friction, seals and cushions, removes heat, cleans inside of the engine, protects against corrosion, performs hydraulic action |
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Where can you find the grade of engine oil specified for a particular aircraft |
In the aircraft flight manual or the pilot operating handbook for the aircraft |
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What components in a reciprocating engine lubrication system must be inspected on a 100 hour or annual inspection |
The oil sump or tank, the oil strainer screen, the oil filter, the oil cooler and the temperature control valve, the oil pressure and temperature gauges and any transmitters associated with them, and the entire engine for indication of leaks |
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What two instruments show the condition of a reciprocating engine lubrication system |
Oil pressure and oil temperature gauges |
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What must be done to an oil filter when it is removed from the engine |
It should be cut open and the pleated element examined to determine the type and amount of contaminant carried by the oil |
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What is a spectrometric oil analysis program |
A program in which a sample of oil is taken from the engine at regular intervals and sent to a laboratory, where it is burned in an electrical arc. The resulting the light is analyzed for wave lengths of the element that are present in the oil sample. Traces of aluminum, copper, and iron in the oil indicate wear of the pistons or wrist pin plugs aluminum, cylinder walls or piston rings iron, main bearings or bushings copper. A single sample is meaningless. There must be a single series of samples taken at regular intervals to measure the change in the amount of these metals |
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What is the purpose of an air – oil separator, or deaerator, in a turbine engine oil tank |
In normal operation, the oil picks up a quantity of air and it is whirled as it enters the deaerator. This whirling action releases the air from the oil, and the air is used to pressurize the oil tank |
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What type of oil quality indicator is used in most aircraft engines |
A dipstick that measures the quantity of oil in the tank or sump |
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When should the engine oil quantity be checked on a turbine engine |
As soon as practical after the engine is shut down |
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Where is the oil temperature measured on a reciprocating engine |
Usually at the oil pressure screen before the oil goes into engine passages |
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How is oil pressure regulated in an aircraft engine |
A pressure relief valve senses the desired pressure and sends all of the oil that caused excessive pressure back into the engine sump |
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Why do engine manufacturers recommend that the engine lubricating oil be changed at specific intervals |
The oil picks up the contaminants and carries them through the engine where they can cause wear. It will also becomes acidic and causes corrosion in the engine |
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What is the purpose of the restricted orifice in the line between the oil pressure gauge and the engine |
The restricted fitting helps dampen pulsation in the oil pressure caused by the pump |
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What is a hot pink lubrication system in a turbojet engine |
A lubrication system in which the oil cooler is in the pressure subsystem and the scavenged oil is not cooled before it returns to thank |
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What is a cold tank lubrication system for a turbojet engine |
A lubrication system in which the oil cooler is in the scavenge subsystem, and the scavenged oil is cooled before it is returned to the tank |
