Part 2 Example Questions

Question 1

DME reply pulses are 63 MHz:

a) higher
b) lower
c) higher or lower

Answer 1

Higher or lower

Question 2

Flight director incompatible modes are:

a) VOR and glideslope
b) heading and altitude hold
c) VOR and altitude hold

Answer 2

Heading and altitude hold

Question 3

GPS sends L1 and L2. What is on L1?

a) C/A code only
b) C/A code and P code
c) P code only

Answer 3

C/A code and P code

Question 4

On power up, the IRS obtains position:

a) latitude from previous position
b) longitude from previous position
c) latitude and longitude from previous position

Answer 4

Latitude and longitude from previous position

Question 5

In the air traffic control transponder system, aircraft altitude signals are sent to ground radar in response to mode:

a) C interrogations
b) S interrogations
c) A interrogations

Answer 5

C interrogations

Question 6

The Radio Altimeter output is affected by:

a) barometric altitude
b) height above the ground immediately below the aircraft
c) the mode selected on the AFCS

Answer 6

Height above the ground immediately below the aircraft

Question 7

Where is precession ‘felt’ in a gyroscope?

a) at the point the force is applied
b) at 90° in the opposite direction of rotation
c) at 90° in the direction of rotation

Answer 7

At 90° in the direction of rotation

Question 8

HF systems:

a) cannot be used on high speed aircraft because a long wire antenna is required
b) presents a significant hazard to maintenance personnel when operated on the ground
c) is limited to a smaller number of channels than VHF because VHF frequencies are much higher

Answer 8

Presents a significant hazard to maintenance personnel when operated on the ground

Question 9

The ILS system localiser provides:

a) vertical deviations from the required landing flight path
b) lateral deviations from the required landing flight path
c) lateral deviations from the desired track

Answer 9

Lateral deviations from the required landing flight path

Question 10

The system used to determine the slant range distance from the aircraft to a ground station is:

a) VOR
b) TCAS
c) DME

Answer 10

DME

Question 11

As part of the ATC transponder system, the mode which has the capability of the other two is mode:

a) A
b) C
c) S

Answer 11

S

Question 12

Carbon microphones require:

a) DC supply
b) AC supply
c) no supply

Answer 12

DC supply

Question 13

The maximum azimuth coverage by a MLS facility is:

a) ± 35°
b) ± 40°
c) ± 60°

Answer 13

± 40°

Question 14

The speech frequency ‘range’ used in airborne radio communications is:

a) 3 MHz to 30 MHz
b) 30 Hz to 300 Hz
c) 300 Hz to 3 kHz

Answer 14

300 Hz to 3 kHz

Question 15

The HF band is from:

a) 118 MHz to 136.995 MHz
b) 30 MHz to 300 MHz
c) 3 MHz to 30 MHz

Answer 15

3 MHz to 30 MHz

Question 16

The power output of a VHF system is:

a) 300 watts
b) 55 watts
c) 25 watts

Answer 16

25 watts

Question 17

At jet cruising altitudes, the range of VHF transmissions is in the region of:

a) 2500 nm
b) 125 nm
c) 250 nm

Answer 17

250 nm

Question 18

The VHF international aeronautical distress frequency is:

a) 121.5 MHz
b) 221.5 MHz
c) 243.0 MHz

Answer 18

121.5 MHz

Question 19

Aircraft VHF communication systems use the frequency range of:

a) 118 MHz to 136.995 MHz
b) 3 MHz to 30 MHz
c) 30 MHz to 300 MHz

Answer 19

118 MHz to 136.995 MHz

Question 20

To receive a vertically polarised RF signal, the antenna is required to be:

a) vertical
b) horizontal
c) either vertical or horizontal

Answer 20

Vertical

Question 21

When transmitting a VHF band signal, the length of the antenna will be:

a) longer than an antenna used for LF band
b) shorter than an antenna used for UHF band
c) shorter than an antenna used for LF band

Answer 21

Shorter than an antenna used for LF band

Question 22

In a basic AM receiver, the:

a) amplifier allows the EM wave to be developed into an electrical signal
b) oscillator selects and amplifies the required signal
c) demodulator removes the carrier and keeps the original modulating signal

Answer 22

Demodulator removes the carrier and keeps the original modulating signal

Question 23

The DC tuning voltage in a frequency synthesiser is taken from the:

a) VCO
b) frequency divider circuit
c) frequency and phase comparator

Answer 23

Frequency and phase comparator

Question 24

In HF, the skip distance will be:

a) greatest during the night
b) at a peak during the daytime
c) the same at night as during the day

Answer 24

Greatest during the night

Question 25

What is the channel spacing for VHF above FL 195?

Answer 25

8.33 kHz giving 2280 channels

Question 26

Where is the power supply for the number 1 V/UHF transceiver taken from?

Answer 26

Battery busbar

Question 27

What is the channel by which applications communicate in an IMA system called?

Answer 27

Logical

Question 28

The payload of an ARINC 664 Part 7 message is 13 bytes, how many padding bytes are required?

Answer 28

4