day 10 progress check Flashcards
How does a Bourdon tube thermometer measure temperature?
By utilizing the expansion of vapor from a volatile liquid.
What challenge does high-speed flight pose for accurate air temperature measurement?
Friction and air compressibility affect the accuracy of static air temperature readings.
What is the purpose of a flux valve in a slaved gyro compass system?
To detect the Earth’s magnetic field and provide signals to align the gyro and flight deck indicator.
What is the primary advantage of using bimetallic thermometers in light aircraft?
They are simple, reliable, and ideal for measuring outside air temperature (OAT).
What problem does the vertical magnetic compass address that is inherent in standard magnetic compasses?
The reverse rotation of the compass card during turns.
What is the primary application of thermocouples in aircraft?
To monitor critical engine temperatures such as Cylinder Head Temperature (CHT) and Exhaust Gas Temperature (EGT).
What is the significance of using multiple thermocouples in a turbine engine’s exhaust gas temperature (EGT) system?
To provide an average temperature reading, ensuring a more accurate EGT indication.
How does a thermocouple generate an electromotive force (EMF)?
By the interaction of two unlike metals at different temperatures.
What is the purpose of the over-temperature warning light in a turbine inlet temperature (TIT) indicating system?
To indicate when the turbine inlet temperature exceeds a predetermined safety limit.
Why are ratiometer electrical resistance thermometers preferred for critical temperature measurements?
They are unaffected by voltage fluctuations and offer higher accuracy.
What is a key advantage of using a solid-state magnetometer in modern aircraft?
It provides high accuracy and stability without moving parts
What principle does an electrical resistance thermometer use to measure temperature?
The change in electrical resistance of a metal with temperature.
Why is the Total Air Temperature (TAT) measurement important in aviation?
It accounts for the increase in temperature caused by the aircraft’s speed through the air, ensuring accurate performance monitoring.
How do pressure altimeters measure altitude in an aircraft?
By measuring atmospheric pressure using aneroid diaphragms.
Why are remote indicating compasses often placed in the wingtip or vertical stabilizer of an aircraft?
To minimize magnetic deviation by locating the compass away from magnetic interference.
