Engine Instrument System Flashcards
What are three type of flow-indicating systems used for turbine engines?
-Vane-type flow meter
-electronic motorless mass flow meters
-synchronous mass type flow meter
What do mass flow systems measure?
The mass of the flow. This is affected by the density of the fuel which is in turn affected by the fuel temperature.
In what unit is an electronic motorless mass flow meter system calibrated?
Pounds per hour of fuel flow
What is indicated in a turbine engine if the fuel flow for all conditions is high?
If there are other instrument abnormalities, there are possibly damaged turbine components.
Who is authorized to repair a fuel flow indicating system?
FAA approved repair station certificated for the particular instruments.
Where can you find the electrical power requirements for a fuel flow indicating system?
In the aircraft maintenance manual.
Where in the fuel system is the fuel flow transmitter located?
Between the fuel control and the fuel nozzles.
What kind of indicator mechanism is used to measure oil pressure? (AM.III.D.K4)
A Bourdon tube.
What kind of indicator mechanism is used to measure manifold pressure? (AM.III.D.K4)
A differential bellows.
What should a manifold pressure gauge read when the engine is not operating? (AM.III.D.K4)
When an engine is not operating, a manifold pressure gauge should read the same as the ambient air pressure, essentially indicating the atmospheric pressure at your current location; this is because with the engine off, there is no vacuum created in the intake manifold.
What type of fitting is used to connect an oil pressure gauge to the engine? (AM.III.D.K4)
A fitting with a restrictor that prevents oil pulsations.
What is used to fill the line between a fuel pressure gauge and the fuel metering system? (AM.III.D.K4)
A light oil such as kerosine.
KEE-O-SINE
What could cause a fuel pressure gauge to fluctuate? (AM.III.D.K4)
The loss oil in the line.
What is the range of pressure needed for a fuel pressure gauge used with a float carburetor? (AM.III.D.K4)
Normally from 1 to 25 psi.
