Engine Instrument System Flashcards
Where would a carburator air temperature bulb be located?
In the ram air intake duct.
Name the basic components of a fuel indicator system:
The transmitter and the indicator.
What does the manifold gauge indicate and how it is calibrated(as in what unit of measurements does it indicate)?
It measures the absolute pressure in the engine manifold and is calibrated in inches of Mercury.
What does a tachometer indicate on a reciprocating engine?
Engine R.P.M. (crankshaft speed)
Where should the thermocouple be installed on a reciprocating engine using a single probe cylinder head temperature system?
On the hottest cylinder.
What is the electrical source for a cylinder head temperature system?
A thermocouple.
During engine operation, where should the propeller control be set when checking the manifold pressure?
Low pitch, high R.P.M.
What directly controls manifold pressure?
Throttle opening and engine R.P.M.
On an engine equipped with a fixed pitch propeller, what controls both manifold pressure and engine RPM?
The throttle control.
How are gas TURBINE engine tachometers calibrated ?
In percent % of RPM.
What are TURBINE engine tachometer gauges designed to indicate?
Percentage of compressor RPM.
What does turbine engine EGT indicate?
The average temperature of turbine discharge gases.
On a turbine engine, what does exhaust gas temperature (EGT) indicate and how it is obtained?
EGT is the average temperature of the turbine DISCHARGE GASES and is obtained by thermocouples placed near the turbine exit.
On a turbine engine, what is the engine pressure ratio? and what does it indicate?
It is the ratio between the total inlet pressure and total turbine exhaust pressure and is used to indicate the thrust developed by the engine.
What does turbine engine pressure ratio indicate?
Thrust being developed by the engine.
What pressures are measured to obtain engine pressure ratio?
Total inlet pressure and total turbine exhaust pressure.
Why is fuel flow monitored?
To determine fuel consumption and engine performance.
What is a shaft horse-power?
It is the TORQUE developed by a turboprop or turboshaft engine.
What is the possible cause when a turboprop engine oil pressure drops off severely and the oil supply remains full?
Oil pressure transmitter or indicator malfunction.
Can the EGT system on a turbine engine be checked without running the engine?
YES…
By checking the resistance of the thermocouple and circuits.
What unit of measure is generally used to indicate fuel flow?
Pounds or gallons per hour.
