Aircraft Instruments Flashcards
What aircraft instrument can be used to check a manifold pressure gauge for proper indication
Sensitive altimeter
Name several of the indication errors that may be found in altimeters
Scale errors, hysteresis, friction, installation
What is the signal source in an electrical resistance type temperature induction system
A temperature bulb or sensing element
What type of temperature sensing system is normally used to measure a turbine engine exhaust gas temperature
Thermocouple type system
What operating parameter is indicated by a tachometer
Engine RPM
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
Gyroscope precession
What are toe items that should be considered during inspection of a magnetic compass
- The fluid must be clear
- Housing must be full with no bubbles
- Compass should be properly calibrated
Describe the basic operating concept of a synchro-type remote indicating system
A remote transmitter electrically signal a receiver inside the instrument
What aircraft instruments are connected to the pitot static system
The altimeter, vertical speed indicator, and airspeed indicator
Why should you avoid cleaning obstructions from the sensing holes in a pitot static system with tool
The holes are aerodynamically critical
After components in a pitot static system have been replaced what test or inspection 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
Who is authorized to apply the range markings to an instrument dial face
The manufacturer or a certificated instrument repair station
What is the purpose of a slippage mark on an instrument glass
To indicate if the glass has moved which could cause incorrect range markings on an instrument
What reference should be consulted to determine the proper range markings for aircraft instruments
Aircraft maintenance Manuel, aircraft flight manual, type certificate data sheet or aircraft specifications
What is the meaning of a yellow arc on an aircraft instrument
A caution or limited flight operations range
What is the maximum amount of deviation error allowed when magnetic compass is installed in an aircraft
10 degrees
What error is corrected when an aircraft compass is swung
Deviation error
What are the vanes of a wet type air pump made of
Steel
What toe types of pumps are used in the low pressure pneumatic system
Dry type and wet type air pump
What are the vanes of a dry type air pump made of
Carbon
Where are the requirements for the altimeter system tests found
Part 43 Appendix E
How often should a altimeter be checked if it is installed in an aircraft used in IFR flight
Every 24 colander months
What instrument indications will result if the static pressure line becomes disconnected inside the cabin of a pressurized aircraft
Altimeter and airspeed indications will be lower than normal and the vertical speed indicator will indicate a momentary decent and then return to Zero
What are the sources of power to gyroscopic instrument operation
Gyroscopic instruments can be operated either by vacuum, electricity or by air pressure
Where are instrument range marking placed
Placed on the outer edge of the cover glass or over the calibrations on the dial face of the instrument
When inspecting a magnetic compass the bowl should be filled with liquid and should not contain any bubbles or discoloration. what is the purpose of the liquid in the bowl
To dampen the oscillations of the floats
Why do you not try to remove blockage in a pitot system
To prevent further damage to the pitot system
A static check may be performed on a manifold pressure gauge by using what piece of information
Current atmospheric pressure
