Engine Instrument System Flashcards
Where would a carburetor 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
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
t 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
