Engine Instrument Systems 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 a manifold gauge indicate and how is it calibrated?
It measures the absolute pressure in the engine manifold and its calibrated in inches of mercury
What does a tachometer indicate on a reciprocating engine?
Engine rpm
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 on check in the manifold pressure?
Low pitch, high rpm
What directly controls manifold pressure?
Throttle opening and engine rpm
On an engine equipped with a fixed pitch propeller what controls both the 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 is it obtained?
EGT is the average temperature of the turbine discharge gases. It is obtained by thermocouples place near the turbine exit
On a turbine engine, what is the engine pressure ratio and what does it indicate?
What is the ratio between the total inlet pressure and a total turbine exhaust pressure. It 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 shaft horsepower?
What is the torque developed by a turbo prop or turbo shaft engine
What is the possible cause when a turbo prop engine oil pressure drops off severely in 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
