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Exam Review

Key Facts: CAA NZ AME Radio Exam

50 Q

Exam Questions

CAA NZ AC66-2.15 / Aspeq

90 Min

Exam Duration

Aspeq Exam Rules

70%

Passing Score

CAA NZ Part 66

$108 NZD

Exam Fee

Aspeq Official Fee Schedule

CAA NZ AME Subject 15 Radio is a 50-question, 90-minute CBT exam administered by Aspeq requiring a 70% pass mark for NZ AME avionics/radio rating licensing.

Sample CAA NZ AME Radio Practice Questions

Try these sample questions to review concepts for the CAA NZ AME Radio exam. Each question includes a detailed explanation. Start the interactive quiz above for the full 100+ question experience with AI tutoring.

1What is the wavelength of an aviation VHF communication signal operating at a frequency of 120.0 MHz? (Assume c = 3.0 x 10^8 m/s)

A.2.5 meters

B.0.4 meters

C.25.0 meters

D.1.2 meters

Explanation: Using the wave equation lambda = c / f, where c = 3.0 x 10^8 m/s and f = 120.0 MHz (120 x 10^6 Hz): lambda = (300 x 10^6) / (120 x 10^6) = 2.5 meters.

2Which frequency band is allocated internationally for aeronautical VHF voice communications?

A.118.000 MHz to 136.975 MHz

B.108.000 MHz to 117.950 MHz

C.225.000 MHz to 399.950 MHz

D.2.000 MHz to 29.999 MHz

Explanation: Aeronautical VHF voice communications operate within the Very High Frequency (VHF) band from 118.000 MHz to 136.975 MHz (with 8.33 kHz or 25 kHz channel spacing).

3What is the approximate speed of electromagnetic radio waves traveling through free space?

A.3.0 x 10^8 meters per second (300,000 km/s)

B.3.0 x 10^6 meters per second (3,000 km/s)

C.343 meters per second

D.1.86 x 10^5 meters per second

Explanation: Electromagnetic radio waves travel in free space at the speed of light, which is approximately 3.0 x 10^8 m/s or 300,000 kilometers per second.

4What primary propagation mode enables High Frequency (HF) radio signals to travel beyond the horizon?

A.Sky wave propagation (ionospheric reflection)

B.Direct line-of-sight space wave

C.Ground wave surface propagation

D.Tropospheric ducting

Explanation: HF signals (3–30 MHz) achieve long-distance, over-the-horizon propagation via sky waves, which refract/reflect off ionized layers in the Earth's ionosphere.

5Line-of-sight propagation constraints apply primarily to which frequency spectrum bands?

A.VHF, UHF, SHF, and higher frequency bands

B.LF and VLF bands only

C.MF and HF bands exclusively

D.VLF, LF, and MF bands

Explanation: Frequencies above 30 MHz (VHF, UHF, SHF, EHF) pass through the ionosphere without reflection and do not follow Earth curvature, restricting their range to direct optical and radio line-of-sight.

6What is the theoretical physical length of an ideal quarter-wave monopole antenna for a 150 MHz transmitter signal?

A.0.50 meters (50 cm)

B.2.00 meters (200 cm)

C.1.00 meter (100 cm)

D.0.25 meters (25 cm)

Explanation: Wavelength lambda = c / f = (3.0 x 10^8) / (150 x 10^6) = 2.0 meters. A quarter-wave antenna length L = lambda / 4 = 2.0 / 4 = 0.50 meters (50 cm).

7What is the standard characteristic impedance of coaxial transmission cables used in aircraft radio installations?

A.50 ohms

B.75 ohms

C.300 ohms

D.600 ohms

Explanation: 50 ohms is the universal standard characteristic impedance for coaxial cables (e.g. RG-58, RG-142, RG-400) and RF connectors in aircraft communication and navigation systems.

8What is the primary function of an aircraft audio integrating / interphone system?

A.Selecting and routing microphone and headset audio between flight crew, interphone, and radios

B.Modulating HF transmitter carrier signals with digital data

C.Converting analog voice signals directly into digital ACARS packets

D.Amplifying weather radar echo pulses for cockpit display

Explanation: The audio integrating system (Audio Control Panel) controls the routing and amplification of microphone inputs and headset/speaker outputs across communication radios, navigation receivers, and interphone stations.

9What standard acoustic frequency is transmitted by an underwater locating beacon (ULB) attached to an aircraft CVR?

A.37.5 kHz

B.121.5 MHz

C.406.0 MHz

D.1000 Hz

Explanation: Underwater Locating Beacons (ULBs or 'pingers') attached to CVRs and FDRs transmit an ultrasonic acoustic pulse at 37.5 kHz (+/- 1 kHz) when immersed in water.

10What does the acronym ACARS stand for in aviation communications?

A.Aircraft Communications Addressing and Reporting System

B.Automatic Control and Radio Surveillance

C.Aeronautical Collision Avoidance and Radar System

D.Airborne Communication Audio Routing System

Explanation: ACARS stands for Aircraft Communications Addressing and Reporting System, a digital datalink system for transmitting operational messages between aircraft and ground stations.

About the CAA NZ AME Radio Exam

The CAA NZ AME Subject 15 Radio examination tests an aircraft maintenance engineer's knowledge of radio principles, wave propagation, VHF/HF communications, interphone, CVR, ACARS, SATCOM, analog/digital modulation, VOR, ADF, DME, ILS, Mode A/C/S transponders, ADS-B Out, TCAS, Airborne Weather Radar, and GNSS receivers under CAA NZ Advisory Circular AC66-2.15.

Exam sponsor: Civil Aviation Authority of New Zealand (exams via Aspeq). The requirements and fees below concern the certification or admission exam, separate from our free practice resources.

Assessment

50 MCQs administered electronically by Aspeq. 70% minimum passing score in 90 minutes.

Time Limit

90 minutes

Passing Score

70%

Exam / Certification Fees

$108 NZD

Exam sponsor website

Fees, eligibility, and exam policies can change. Confirm them with the exam sponsor before applying or paying.

Official sources

Our practice resources: topics covered

We aim to reflect publicly available exam outlines and topic information in our study resources. Coverage, format, and difficulty may differ from the actual exam, and we cannot guarantee that every detail is accurate or current. Confirm exam requirements, fees, and policies with the official exam sponsor.

30%

Radio Principles & Wave Propagation

Electromagnetic spectrum, wave equations (lambda=c/f), HF/VHF/UHF/SHF bands, ground/sky/skip propagation, antennas, transmission lines, and SWR.

35%

Communication Systems & Modulation

VHF com, HF SSB com, interphone/audio integrating systems, Cockpit Voice Recorder (CVR), ACARS data link, SATCOM, and AM/FM/digital modulation.

35%

Navigation & Surveillance Systems

VOR receivers, NDB/ADF systems, DME, ILS (localizer, glide slope, marker beacon), Mode A/C/S transponders, ADS-B Out, TCAS, Airborne Weather Radar, and GNSS receivers.

Preparing for the CAA NZ AME Radio Exam

What You Need to Know

Passing score: 70%
Assessment: 50 MCQs administered electronically by Aspeq. 70% minimum passing score in 90 minutes.
Time limit: 90 minutes
Exam / certification fees: $108 NZD Official sources

Using Our Practice Resources

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CAA NZ AME Radio: Suggested Study Strategy

1Master the radio wave equation lambda = c / f (c = 300,000,000 m/s or 300 x 10^6 m/s) and antenna length formulas (quarter-wave whip, half-wave dipole).

2Understand RF propagation modes: ground wave (LF/MF), sky wave ionospheric reflection (HF), and line-of-sight space wave (VHF/UHF/SHF).

3Study navigation system carrier frequencies, modulation principles (VOR 30Hz variable vs 30Hz reference; ILS 90Hz vs 150Hz tone depth difference; ADF 190-1750 kHz).

4Review surveillance systems: Transponder 1030 MHz interrogation / 1090 MHz reply, ADS-B Extended Squitter, TCAS resolution advisories, and Weather Radar X-band pulse timing.

5Learn transmission line characteristics, coaxial cable impedance (50 ohm), VSWR reflection calculations, and antenna coupler/matching networks.

Frequently Asked Questions

What is the passing score for the CAA NZ AME Subject 15 Radio exam?

The passing mark required by CAA NZ and Aspeq is 70%.

How long is the CAA NZ AME Radio examination?

Candidates are allowed 90 minutes to complete the 50 multiple-choice questions.

Does the exam include mathematical calculations for radio waves?

Yes, candidates must solve wavelength and frequency calculations (lambda = c / f), antenna dimensions, line-of-sight propagation distances, and standing wave ratios.

Where can I sit the CAA NZ AME examinations?

Examinations are conducted electronically at official Aspeq examination centres throughout New Zealand and designated overseas sites.

What advisory circular outlines the Subject 15 Radio syllabus?

CAA NZ Advisory Circular AC66-2.15 outlines the full syllabus and learning objectives for Subject 15 Radio.