Airframe Oral (Jeppesen) Aircraft Instrument Systems Flashcards
A static check may be performed on a manifold pressure gauge by using what piece of information?
Current atmospheric pressure.
What aircraft instrument can be used to check a manifold pressure gauge for proper indication?
The sensitive altimeter.
Name several of the indication errors that may be found in altimeters.
Scale errors, hysteresis, function, installation.
What is the signal source in an electrical resistance-type temperature indicating system?
A temperature bulb or sensing element.
What type of temperature sensing system is normally used to measure a turbine engine exhaust gas temperature?
A thermocouple-type system
What operating parameter is indicated by a tachometer?
Engine RPM{i.e., crankshaft or turbine rotor speed}.
What is the name of the effect that causes a gyro to respond to an applied force at a point 90 degrees further in the direction of rotation?
Gyroscopic precession
What are the three sources of power used to drive a gyroscopic turn indicator?
Air from a vacuum or pressure source, or an electric motor.
What are two items that should be considered during inspection of a magnetic compass?
{1} The fluid must be clear. {2} The housing must be full with no bubbles. {3} The card must be legible and the lubber line intact. {4} The compass should be properly calibrated.
In what way do magnetic fields generated by electrical equipment and steel parts in the airplane affect a magnetic compass?
Stray magnetic fields deflect the compass from correct alignment with the earth’s magnetic field.
Describe the basic operating concept of a synchro-type remote indicating system.
A remote transmitter electrically signals a receiver inside the instrument.
What aircraft instruments are connected to the pitot-static system?
The altimeter, vertical speed indicator, airspeed and Mach meter in high-performance jets.
Why should you avoid cleaning obstructions from the sensing holes in a pitot-static system with a tool?
The holes are aerodynamically critical.
After components in a pitot-static system have been replaced, what tests or inspections are required?
The static system leak test specified by FAR 91.411.
What quantity is accurately measured by a capacitance-type fuel quantity indicating system?
The mass of the fuel.
