30 Questions
What is the purpose of the accelerometers in an Inertial Navigation System?
To calculate the aircraft's velocity and position
How does the stable platform remain accurately aligned to the aircraft axes?
Through the use of servomotor systems and a gimbal system
What is the function of the rate gyroscopes on the stable platform?
To detect any displacement of the platform from its reference position
What is the purpose of the torque motor in the stable platform system?
To drive the platform back to its reference position
What is the Inertial Navigation Unit (INU) part of?
The Inertial Navigation System (INS)
How many components make up a single Inertial Navigation System (INS)?
5
What is the primary factor that determines the liability of error of the radio compass?
ratio of indirect to direct waves in the received signal
What is an advantage of a GPS receiver module in a strapdown IRU?
It removes the need for the aircraft to be held stationary for inflight alignment
What is the approximate range of an NDB over land where the ground wave transmission dominates?
60 miles
What is the primary function of radio navigation equipment?
To provide position information to the pilot
What causes the night effect on radio compass readings?
Increased strength of indirect waves at night
What is the result of the IRU filling in for GPS outages?
Seamless continuation of navigation
What happens to the bearing indications as the distance from the NDB increases?
They become erratic
What is the term for the effect of terrain on the useful range of an NDB?
Coastal refraction
Why do older systems and long-range navigation systems use lower frequency bands?
Because they are based on the age of the system and navigation requirement
What is the advantage of an IRU providing a continuous high-bandwidth measurement of position and velocity?
It provides a more accurate measurement of position and velocity
At what times are errors in radio compass readings particularly pronounced?
During sunrise and sunset
In what type of weather conditions can radio navigation equipment be used?
In all weather conditions
What is the primary function of the GPWS computer?
To receive and process data from various aircraft systems
What is the purpose of the 'whoop whoop pull up' warning message?
To alert the pilots of a possible collision with terrain
Which system provides the GPWS computer with glideslope deviation data?
VHF navigation system
What is the typical output of the GPWS computer?
Aural announcements and visual warning indicators
What is the primary source of altitude data for the GPWS computer?
RADALT system
What is the purpose of the barometric rate of change of altitude data in the GPWS?
To determine the aircraft's descent rate
What is the primary purpose of using four or more satellites in GPS navigation?
To improve accuracy and provide precise altitude information
What is the constant speed used in GPS calculations?
300 000 000 meters per second
What is the purpose of the coded signal emitted by each satellite?
To contain the exact timing of the signal emission to Earth
Why is an atomic clock not necessary in GPS receivers?
Because the satellites' atomic clocks are sufficient
What is the minimum number of satellites required to determine a receiver's position using three-dimensional trilateration?
Three
What is the advantage of using four satellites instead of three in GPS navigation?
Improved accuracy and precise altitude information
This quiz covers the fundamental concepts of aircraft axes, acceleration measurement, and its applications in calculating aircraft velocity and position. It's essential for aircraft engineers and pilots to understand these principles to ensure safe and efficient flight operations. The quiz is based on the CASA Part 66 training materials.
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