Dawson 2211 Mid Term Study guide

Avionics

What type of signal is data transmitted between components in an EFIS converted into?

Digital signal

What is the function of a CRT in an EFIS-equipped aircraft?

Displays flight information to the pilot.

What does a symbol generator do in an EFIS-equipped aircraft?

Generates the symbols and information displayed on the CRT/display.

What is the function of a DCU in an EFIS-equipped aircraft?

Controls the display and allows the pilot to select displayed information.

How does a radar altimeter determine altitude?

By measuring the time for radio waves to travel to the ground and return.

What type of altitude does a radar altimeter indicate?

Absolute altitude (AGL).

What do flags such as NAV, HDG, or GS indicate?

The associated information is invalid or unreliable.

What frequency band is considered a space wave?

VHF and higher frequencies.

Which instruments are connected to an aircraft's pitot-static system?

Airspeed indicator, altimeter, and vertical-speed indicator.

How would an airspeed indicator be marked to show VNE?

With a red radial line.

Which frequency band is considered best for long-range communications?

HF.

What two frequencies does a transponder operate on?

1030 MHz interrogate; 1090 MHz reply.

What is the lubber line on a directional gyro used to indicate?

The aircraft's heading.

What is the primary purpose of an autopilot?

To automatically maintain the aircraft's desired flight path, attitude, or heading.

What is the cable that connects the servo to the primary flight control cable?

Bridle cable.

What is the maximum number of axes that can be controlled by an autopilot, not including trim?

Three axes.

What is used to prevent Dutch roll?

A yaw damper.

What component of an autopilot system applies torque to the control surfaces?

The servo.

What is the main purpose of a servo in an autopilot system?

To move the flight controls.

Which channel of an autopilot detects changes in pitch attitude?

Pitch channel.

The elevator channel of an autopilot controls the aircraft about which axis?

Lateral axis.

What components are the sensing devices in an electromechanical autopilot system?

Gyroscopes.

A fully integrated autopilot controls the aircraft around how many axes?

Three axes.

When operationally checking an autopilot on the ground, when should it be engaged?

After the gyros have reached operating speed.

Installed radio equipment is protected from jolts and vibration by what?

Shock mounts.

What two antennas are used in an ADF system?

Loop antenna and sense antenna.

When must an ELT battery be replaced?

When 50% of its useful life has expired or after one cumulative hour of use, whichever occurs first.

How long must an ELT battery be capable of furnishing power for signal transmission?

48 hours.

Where is the preferred location of an ELT?

In the aft fuselage.

How may the battery replacement date be verified for an ELT?

By checking the date marked on the battery.

Where must an aircraft antenna be grounded?

To the aircraft structure/grounding system.

What systems are VHF radio signals commonly used in?

Communication and navigation.

On modern large aircraft, what electronic device typically monitors flight parameters and performs autopilot functions?

Flight control computer.

What is the purpose of an aircraft transponder?

To identify the aircraft and provide altitude information.

What is the preferred location of a VOR antenna on a light aircraft?

On top of the aircraft, usually on the vertical stabilizer.

What is the purpose of a localizer?

Provides lateral guidance to the runway centerline.

What is the purpose of a glideslope system?

Provides vertical guidance for the approach.

What are the two signals generated by a VOR ground station?

Reference signal and variable signal.

What frequency is used to test the VOR?

108.00 MHz.

What frequency is used to test the localizer?

108.10 MHz.

What frequency band is the localizer?

VHF.

What is the isolate mode on an intercom system?

It isolates the pilot from other passengers/crew audio.

What is considered unmuted audio?

Audio that is continuously heard regardless of signal strength.

What are some warnings given by the EGPWS?

Terrain, pull up, sink rate, and excessive descent warnings.

What does +10 with an up arrow indicate on a traffic system?

Traffic is 1,000 feet above and climbing.

What is a TA?

Traffic Advisory.

What is an RA?

Resolution Advisory.

What instruments are displayed on the PFD?

Attitude, airspeed, altitude, heading, vertical speed, and flight guidance information.

What is displayed on the MFD?

Navigation, moving maps, weather, traffic, and other aircraft/system information.

What is the EICAS system?

Engine Indicating and Crew Alerting System.

What is the AHRS system?

Attitude and Heading Reference System.

What is an HSI?

Horizontal Situation Indicator.