Check Instrument Systems Flashcards
1
Q
Why is the length of a thermocouple lead important?
A
Thermocouple accuracy is dependent on the resistance of the circuit. Lead lengths are designed for specific installations and should never be altered
2
Q
A failure of an airspeed indicator needle to move is likely caused by what problem?
A
A blockage in the pilot head will prevent the creation of a differential pressure
3
Q
What may be causing an attitude indicator to not properly erect or display?
A
Gyroscopes are dependent on achieving and maintaining proper rotational speed. Failure to do so may be caused by low vacuum created by the vacuum system or motor failure in an electrically-driven gyroscope
