COMMUNICATION ANG NAVIGATION SYSTEM Flashcards
What is the primary purpose of an autopilot?
to relieve the pilot of control of the aircraft during long periods of flight
Which of the following provides manual maneuverability of the aircraft while the autopilot is engaged?
flight controller
In an autopilot, which signal nullifies the input signal to the ailerons?
follow up signal
In which control element of an autopilot system is an attitude indicator?
sensing
What is the operating principle of the sensing device used in an autopilot system?
the relative motion between a gyro and its supporting system
What will occur if an aircraft attitude is changed by its autopilot system in order to correct for an error and the involved control surfaces are returned to streamline by the time the aircraft has reached its
correct position?
normal operation
What component of an autopilot system applies torque to the control surfaces of an aircraft?
servo
What is the main purpose of a servo in an autopilot system?
move the control surfaces as commanded
Which channel of an autopilot detects changes in pitch attitude of an aircraft?
elevator
The elevator channel of an autopilot controls the aircraft about which axis of rotation?
lateral
What component is the sensing device in an electromechanical autopilot system?
gyro
A fully integrated autopilot controls the aircraft around how many axes?
three
Dutch roll, a combination yawing and rolling oscillation that affects many sweptwing aircraft, is counteracted with
a yaw damper system
When operationally checking an autopilot system on the ground, after the aircraft’s main power has been switched on, the autopilot should be engaged
only after the gyros comes up to speed and the amplifier warms up
Installed radio equipment is protected from damage due to jolts and vibration by
shock mounts
(1) Use solder to attach bonding jumpers on radio equipment.
(2) Radio equipment is bonded to the aircraft in order to provide a low-impedance ground and to
minimize radio interference from static electrical charges.
Regarding the above statements,
only no. 2 is true
When must the radio station license be displayed in an aircraft equipped with a two-way radio?
when the aircraft is operated outside the U.S.
When would a U.S. resident NOT be required to hold a Federal Communications Commission (FCC) Restricted Radio Telephone Operator Permit to operate two-way aircraft VHF radio equipment?
when flying or communicating within the united states
Part of the ADF system used on aircraft includes
sense and loop antennas
When installing coaxial cable, it should be secured firmly along its entire length
at 2 foot intervals
When must the emergency locator transmitter (ELT) battery be replaced (other than reading the
replacement date)?
when the transmitter has been in use for more than one cumulative hour
An emergency locator transmitter (ELT) battery must be capable of furnishing power for signal transmission for at least
48 hours
The preferred location of an ELT is
as far as possible, but forward of the vertical fin
An emergency locator transmitter (ELT) is normally activated by an inertial switch or equivalent mechanism if subjected to a force of a prescribed intensity and duration. It must activate when the force is applied
parallel to the longitudinal axis of the aircraft
How may the battery replacement date be verified for an emergency locator transmitter (ELT)?
by observing the battery replacement date on the outside of the transmitter
How may the operation of an installed emergency locator transmitter (ELT) be verified during aircraft inspection?
by tuning a communications receiver to the civil emergency frequency and activating the ELT momentarily within 5 minutes after the hour
Static dischargers help eliminate radio interference by dissipating static electricity into the atmosphere at
low current levels
Long Range Navigation (LORAN) systems determine aircraft location by
means of pulsed signals transmitted from ground stations
An aircraft antenna installation must be grounded
to the airframe
VHF radio signals are commonly used in
both VOR navigation and ATC communications
On modern large aircraft, what electronic device typically monitors flight parameters and performs autopilot functions?
flight management computer
In the landing configuration GPWS typically monitors the radio (radar) altimeter; air data computer; instrument landing system; and
landing gear and flap positions
In general, the purpose of an aircraft transponder is to
receive an interrogation signal from a ground station and automatically send a reply back
When an antenna is installed, it should be fastened
so that loads imposed are transmitted to the aircraft structures
After an automatic direction finding antenna has been installed, the
loop must be calibrated
Doublers are used when antennas are installed to
reinstate the structural strength of the aircraft skin
One antenna can be used for the radio range and standard broadcast bands in light aircraft because the
two ranges are close together
What characteristics of the installation of a rigid antenna on a vertical stabilizer should be evaluated?
flutter and vibration
A gasket or sealant is used between the antenna mast and fuselage skin
to prevent the entry of moisture
The preferred location of a VOR antenna on light aircraft is on
top of the cabin with the apex of the V pointing forward
The purpose of a localizer is to
align the airplane with the center of the runway
A DME antenna should be located in a position on the aircraft that will
not be blanked by the wing when the aircraft is banked
When bending coaxial cable, the bend radius should be at least
10 times the diameter of the cable
When installing a DME antenna, it should be aligned with the
centerline on the airplane
The addition of avionics and associated antenna systems forward of the CG limit will affect
empty weight and useful load
How much clearance from the seat bottom is required when installing radio equipment under a seat?
1 inch with the seat occupied and subjected to maximum downward seat spring deflection
