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27 Cards in this Set
- Front
- Back
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What are three types of flow-indicating systems used for turbine engines? |
Vane-type Synchronous mass-type Electronic motorless mass-type |
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What do mass flow systems measure? |
The mass of the fuel flow. Which is affected by the fuel density and fuel temperature. |
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In what unit is an electronic motorless mass flow meter system calibrated? |
Pounds per hour of fuel flow. |
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What is indicated in a turbine engine if the fuel flow for all conditions is high? |
It indicates possible damage of components in the turbine. |
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Who is authorized to repair a fuel flow indicating system? |
FAA approved Repair station certificated for the particular instrument. |
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Where can you find the electrical power requirements for fuel flow indicating system? |
Aircraft maintenance manual. |
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Where in the fuel system is the fuel flow transmitter located? |
Between fuel control and 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 with a bulb partially filled with highly volatile liquid installed inside the oil strainer. It is connected to the pressure gauge by a copper tube and 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 temperature? |
Thermocouple system |
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What kind of electrical instrument system is used for measuring oil temperature? |
Ratiometer-type system |
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What should a thermocouple cylinder head temperature indicator read when the engine is cold? |
Same as the outside air temperature gauge. |
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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 resistance? |
The resistance which must have the specified reading usually 2 to 8 ohms. |
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What should a Ratiometer temperature indicator read when the electrical power is off? |
the pointer should be off scale on the low side. |
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What kind of Tachometer is used on most small single engine airplanes? |
Magnetic drag type, Similar to automotive speedometer. |
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What would likely cause the pointer of a magnetic drag tachometer to oscillate? |
Kink in the cable housing, or a dry cable connecting the indicator to the engine. |
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Is it permissible for a mechanic with an airframe and powerplant rating to replace the tachometer cable for a magnetic drag tachometer? |
Yes, this does not constitute a repair to the instrument. |
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What kind of tachometer is used on most large multi-engine airplanes? |
Three-phase AC |
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What is measured to indicate the engine RPM with a three-phase AC Electrical tachometer? |
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? |
Differential bellows. |
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What should the manifold pressure gauge read when the engine is not operating? |
The existing barometric pressure as indicated on the altimeter barometric scale. |
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What type of fitting is used to connect an oil pressure gauge to the engine? |
A fitting that smooths out pulsation usually with a restrictor to prevent break in the indicator line causing serious loss of engine oil. |
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What is used to fill the line between the fuel pressure gauge and fuel metering system? |
Light oil such as kerosene. |
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What could cause a fuel pressure gauge to fluctuate? |
Loss of light oil in the line between the gauge and the engine. |
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Is a certificated mechanic with an airframe and powerplant rating allowed to zero the pointers on a fuel pressure gauge? |
No, a mechanic is not allowed to make a repair or alterations to aircraft instruments. |
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How does a Ratiometer- type oil temperature gauge measure the temperature of the oil? |
It measures the resistance of the temperature bulb. Calibrated in Fahrenheit or Celsius. |
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What is the range of pressure needed for a fuel pressure gauge used with a float carburetor? |
From 1 to 25 psi |
