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27 Cards in this Set
- Front
- Back
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What are three types of flow indicating systems for turbine engines |
Vein types flow meters, synchronous mass type flow meters, and electric motorless mass flow meters |
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What do mass flow systems measure |
The mass of flow. This is affected by the density of fuel which is in turn affected by fuel temperature |
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In what units is in electronic motorless mass flow meter system calibrated |
Pounds per hour of fuel flow |
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What is indicated in the turbine engine if the fuel flow for all conditions this high |
If there are other instrument abnormalities, there are possibly damaged turbine components |
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Who is authorized to repair a fuel flow indicating system |
The components can be repaired only by an FAA approved repair station certificated for that particular instrument |
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Where can you find the electrical power requirements for a fuel flow indicating system |
In the ************* aircraft maintenance manual |
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Where in the fuel system is the fuel flow transmitter located |
Between the fuel control and the fuel nozzles |
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What kind of indicating system is used to measure oil temperature in a small single engine general aviation airplane |
A sealed system in which a bulb, partially filled with a highly volatile liquid, is installed inside the oil strainer. The bulb is connected to a pressure gauge by a copper tube. The pressure of the gas above the liquid is proportional to the temperature of the oil that surrounds the bulb, and the pressure gauge is calibrated in terms of temperature |
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What type of instrument system is used for measuring cylinder head temperature and exhaust gas temperature |
A thermocouple system |
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What kind of electrical instrument system is used for measuring oil temperature |
A ratiometer type system |
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What should a thermocouple cylinder head temperature indicator read while the engine is cold |
The same as the outside air temperature gage |
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What is critical in the installation of the thermocouple leads for a cylinder head temperature indicator, the length of the leads or their resistence |
The resistance is critical, it must have the resistance specified by the indicator. This is usually two or eight ohms |
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What should a ratiometer temperature indicator read when the electrical power is off. |
The pointer should be off the scale on the low side |
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What kind of tachomator is used on most small engine airplanes |
A magnetic drag tachometer that is similar to an automobile speedometer |
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What would likely cause the pointer of a magnetic drag tachometer to oscillate |
Either a dry cable connecting the indicator to the engine, or a kink in the cable housing |
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Is it permissible for a mechanic with an airframe and power plant rating to replace the tachometer cable for a magnetic drag tachometer |
Yes this does not constitute a repair to an instrument |
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What kind of tachometer is used on most large multi engine airplanes |
A three phase AC electric tachometer |
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What is measured to indicate the engine RPM with a three phase AC electric tachometer |
The frequency of the AC the tachometer generator produces |
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What kind of indicator mechanism is used to measure oil pressure |
A bourdon tube |
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What kind of indicator mechanism is used to measure manifold pressure |
A differential bellows |
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What should a manifold pressure gauge read when the engine is not operating |
The existing barometric pressure as indicated on the altimeter barometric scale when the altimeter pointers are set to the surveyed field elevation |
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What type of fitting is used to connect and oil pressure gauge to the engine |
A fitting with a restrictor that smooths out the pulsations and prevents a break in the indicator line, causing a serious loss of engine oil |
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What is used to fill the line between a fuel pressure gauge and the fuel metering system |
A light oil such as kerosene |
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What could cause a fuel pressure gauge to fluctuate |
The loss of the light oil in the line between the gauge and the engine |
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Is a certificated mechanic within airframe and power plant rating allowed to zero the pointers on a fuel pressure gauge |
No, a mechanic is not allowed to make any repairs or alterations to an aircraft instrument |
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How does a ratiometer type oil temperature gauge measure the temperature of the oil |
A ratiometer measures the resistance of the temperature bulb. The indicator is calibrated in degrees Fahrenheit or Celsius rather than an ohms |
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What is the range of pressure needed for a fuel pressure gauge used with a float carburetor |
1 to 25 psi |
