Fcc Grol Element 3K

Front 1

3-68K1

What is the frequency range of the Distance Measuring Equipment (DME) used to indicate an aircraft’s slant range distance to a selected ground-based navigation station?

Back 1

962 MHz to 1213 MHz

Front 2

3-68K2

The Distance Measuring Equipment (DME) measures the distance from the aircraft to the DME ground station. This is referred to as:

Back 2

The slant range

Front 3

3-68K3

The Distance Measuring Equipment (DME) ground station has a built-in delay between reception of an interrogation and transmission of the reply to allow:

Back 3

Operation at close range

Front 4

3-68K4

What is the main underlying operating principle of an aircraft’s Distance Measuring Equipment (DME)?

Back 4

A measurable amount of time is required to send and receive a radio signal through the Earth’s atmosphere

Front 5

3-68K5

What radio navigation aid determines the distance from an aircraft to a selected VORTAC station by measuring the length of time the radio signal takes to travel to and from the station?

Back 5

Distance Measuring Equipment (DME)

Front 6

3-68K6

The majority of airborne Distance Measuring Equipment systems automatically tune their transmitter and receiver frequencies to the paired __ / __ channel.

Back 6

VOR/LOC

Front 7

3-69K1

All directions associated with a VOR station are related to:

Back 7

Magnetic north

Front 8

3-69K2

The rate that the transmitted VOR variable signal rotates is equivalent to how many revolutions per second?

Back 8

30

Front 9

3-69K3

What is the frequency range of the ground-based Very-high-frequency Omnidirectional Range (VOR) stations used for aircraft navigation?

Back 9

108.00 MHz to 117.95 MHz

Front 10

3-69K4

Lines drawn from the VOR station in a particular magnetic direction are:

Back 10

Headings

Front 11

3-69K5

The amplitude modulated variable phase signal and the frequency modulated reference phase signal of a Very-high-frequency Omnidirectional Range (VOR) station used for aircraft navigation are synchronized so that both signals are in phase with each other at ____________ of the VOR station.

Back 11

360 degrees North, magnetic bearing position

Front 12

3-69K6

What is the main underlying operating principle of the Very-high-frequency Omnidirectional Range (VOR) aircraft navigational system?

Back 12

A phase difference between two AC voltages may be used to determine an aircraft’s azimuth position in relation to a selected VOR station

Front 13

3-70K1

What is the frequency range of the localizer beam system used by aircraft to find the centerline of a runway during an Instrument Landing System (ILS) approach to an airport?

Back 13

108.10 MHz to 111.95 MHz

Front 14

3-70K2

What is the frequency range of the marker beacon system used to indicate an aircraft's position during an Instrument Landing System (ILS) approach to an airport's runway?

Back 14

The outer, the middle, and the inner marker beacon’s carrier frequencies are all 75 MHz but the marker beacons are 95% tone-modulated at 400 Hz (outer), 1300 Hz (middle), and 3000 Hz (inner)

Front 15

3-70K3

Which of the following is a required component of an Instrument Landing System (ILS)?

Back 15

Localizer: shows aircraft deviation horizontally from center of runway

Front 16

3-70K4

What type of antenna is used in an aircraft’s Instrument Landing System (ILS) glideslope installation?

Back 16

A folded dipole reception antenna

Front 17

3-70K5

Choose the only correct statement about the localizer beam system used by aircraft to find the centerline of a runway during an Instrument Landing System (ILS) approach to an airport. The localizer beam system:

Back 17

Produces two amplitude modulated antenna patterns; one pattern with an audio frequency of 90 Hz and one pattern with an audio frequency of 150 Hz, one left of the runway centerline and one right of the runway centerline

Front 18

3-70K6

On runway approach, an ILS Localizer shows:

Back 18

Deviation left or right of runway center line

Front 19

3-71K1

What is the frequency range of an aircraft’s Automatic Direction Finding (ADF) equipment?

Back 19

190 kHz to 1750 kHz

Front 20

3-71K2

What is meant by the term “night effect” when using an aircraft’s Automatic Direction Finding (ADF) equipment? Night effect refers to the fact that:

Back 20

Non Directional Beacon (NDB) transmissions can bounce-off the Earth’s ionosphere at night and be received at almost any direction

Front 21

3-71K3

What are the transmit and receive frequencies of an aircraft’s mode C transponder operating in the Air Traffic Control RADAR Beacon System (ATCRBS)?

Back 21

Transmit at 1090 MHz, and receive at 1030 MHz

Front 22

3-71K4

In addition to duplicating the functions of a mode C transponder, an aircraft’s mode S transponder can also provide:

Back 22

Mid-Air collision avoidance capabilities.

Front 23

3-71K5

What type of encoding is used in an aircraft’s mode C transponder transmission to a ground station of the Air Traffic Control RADAR Beacon System (ATCRBS)?

Back 23

Pulse position modulation

Front 24

3-71K6

Choose the only correct statement about an aircraft’s Automatic Direction Finding (ADF) equipment.

Back 24

An aircraft’s ADF antennas can receive transmissions that are over the Earth’s horizon (sometimes several hundred miles away) since these signals will follow the curvature of the Earth

Front 25

3-72K1

What type of antenna pattern is radiated from a ground station phased-array directional antenna when transmitting the PPM pulses in a Mode S interrogation signal of an aircraft’s Traffic alert and Collision Avoidance System (TCAS) installation?

Back 25

1030 MHz directional pattern

Front 26

3-72K2

What type of antenna is used in an aircraft’s Instrument Landing System (ILS) marker beacon installation?

Back 26

A balanced loop reception antenna

Front 27

3-72K3

What is the frequency range of an aircraft’s Very High Frequency (VHF) communications?

Back 27

118.000 MHz to 136.975 MHz (worldwide up to 151.975 MHz)

Front 28

3-72K4

Aircraft Emergency Locator Transmitters (ELT) operate on what frequencies?

Back 28

121.5, 243 and 406 MHz

Front 29

3-72K5

What is the frequency range of an aircraft’s radio altimeter?

Back 29

4250 MHz to 4350 MHz

Front 30

3-72K6

What type of antenna is attached to an aircraft’s Mode C transponder installation and used to receive 1030 MHz interrogation signals from the Air Traffic Control Radar Beacon System (ATCRBS)?

Back 30

An L-band monopole blade-type omnidirectional antenna

Front 31

3-73K1

Some aircraft and avionics equipment operates with a prime power line frequency of 400 Hz. What is the principle advantage of a higher line frequency?

Back 31

The magnetic devices in a 400 Hz power supply such as transformers, chokes and filters are smaller and lighter than those used in 60 Hz power supplies

Front 32

3-73K2

Aviation services use predominantly ____ microphones.

Back 32

Dynamic

Front 33

3-73K3

Typical airborne HF transmitters usually provide a nominal RF power output to the antenna of ____ watts, compared with ____ watts RF output from a typical VHF transmitter.

Back 33

100, 20

Front 34

3-73K4

Before ground testing an aircraft RADAR, the operator should:

Back 34

Ensure that the area in front of the antenna is clear of other maintenance personnel to avoid radiation hazards

Front 35

3-73K5

What type of antenna is used in an aircraft’s Very High Frequency Omnidirectional Range (VOR) and Localizer (LOC) installations?

Back 35

Horizontally polarized omnidirection reception antenna

Front 36

3-73K6

What is the function of a commercial aircraft’s SELCAL installation? SELCAL is a type of aircraft communications __________.

Back 36

System where a ground-based transmitter can call a selected aircraft or group of aircraft without the flight crew monitoring the ground-station frequency