100+ Free CAA NZ AME Electrical Practice Questions

Pass your CAA NZ AME Licence Exam - Electrical (Subject 1B / 11, New Zealand) exam on the first try — instant access, no signup required.

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Key Facts: CAA NZ AME Electrical Exam

50 Qs

Total multiple-choice questions per exam sitting.

CAA NZ / Aspeq Examination Matrix

90 Mins

Time allowed to complete the paper.

Aspeq Examination Guide

70%

Minimum pass mark set by CAA NZ AC66.

CAA NZ Advisory Circular AC66-2

$108 NZD

Exam sitting fee via Aspeq.

Aspeq NZ Fee Schedule

3 Modules

Fundamentals, Power Generation, Wiring & Protection.

CAA NZ AME Subject 1B/11 Syllabus

CAA NZ AME Electrical (Subject 1B / 11) is a 90-minute examination administered via Aspeq requiring a 70% pass mark for aircraft maintenance engineer licensing in New Zealand.

Sample CAA NZ AME Electrical Practice Questions

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

1An aircraft navigation light circuit operates on a 28 V DC supply and draws a steady current of 2.0 A. What is the total electrical resistance of the circuit?

A.14.0 Ohms

B.56.0 Ohms

C.0.07 Ohms

D.26.0 Ohms

Explanation: Using Ohm's Law ($R = V / I$), dividing 28 V by 2.0 A yields a circuit resistance of 14.0 Ohms.

2An aircraft landing light connected to a 28 V DC bus draws a current of 10.0 A. How much electrical power does this light consume?

A.280 W

B.2.8 W

C.2800 W

D.38 W

Explanation: Electrical power is calculated using $P = V \times I$. Multiplying 28 V by 10.0 A equals 280 Watts.

3Three resistors of 4 Ohms, 6 Ohms, and 10 Ohms are connected in series across an aircraft DC power supply. What is the total equivalent resistance of the circuit?

A.20 Ohms

B.1.92 Ohms

C.60 Ohms

D.10 Ohms

Explanation: In a series circuit, total resistance is the sum of all individual resistances: $R_{total} = R_1 + R_2 + R_3 = 4 + 6 + 10 = 20\text{ Ohms}$.

4Two 12-Ohm aircraft cabin reading lamps are connected in parallel across a 24 V DC bus. What is the total equivalent resistance of the combined lamp load?

A.6 Ohms

B.24 Ohms

C.12 Ohms

D.0.166 Ohms

Explanation: For two equal resistors connected in parallel, the total resistance is half the individual value: $R_{total} = R / n = 12 / 2 = 6\text{ Ohms}$. Alternatively, $R_{total} = (12 \times 12) / (12 + 12) = 144 / 24 = 6\text{ Ohms}$.

5What is the standard primary AC power frequency used in modern commercial aircraft electrical distribution systems?

A.400 Hz

B.50 Hz

C.60 Hz

D.1000 Hz

Explanation: Modern aircraft AC electrical systems standardize on 400 Hz because higher frequency allows transformers, generators, and motors to be manufactured significantly smaller and lighter than equivalent 50/60 Hz ground equipment.

6What chemical solution is used as the electrolyte in a lead-acid aircraft battery?

A.Dilute sulfuric acid

B.Potassium hydroxide

C.Sodium chloride

D.Distilled water with nickel sulfate

Explanation: Lead-acid aircraft batteries use dilute sulfuric acid ($H_2SO_4$) mixed with distilled water as their active electrolyte.

7What chemical compound serves as the active electrolyte in a Nickel-Cadmium (Ni-Cad) aircraft battery?

A.Potassium hydroxide

B.Dilute sulfuric acid

C.Nitric acid

D.Lead sulfate

Explanation: Nickel-Cadmium aircraft batteries utilize an alkaline solution of potassium hydroxide (KOH) diluted in distilled water as the electrolyte.

8What is the typical specific gravity of a fully charged lead-acid aircraft battery electrolyte at 20 degrees Celsius?

A.1.275 to 1.300

B.1.000 to 1.050

C.1.100 to 1.150

D.1.400 to 1.450

Explanation: A fully charged lead-acid battery cell has an electrolyte specific gravity between 1.275 and 1.300 (commonly referenced as 1.285 at 20°C / 70°F).

9What is the primary function of a Transformer-Rectifier Unit (TRU) in an aircraft electrical system?

A.To convert 115 V AC power to 28 V DC power

B.To convert 28 V DC power to 115 V AC power

C.To step up 28 V DC to 270 V DC

D.To regulate generator frequency

Explanation: A TRU steps down 115 V AC primary power using a transformer and rectifies it via a diode bridge to output 28 V DC power for the aircraft main DC bus.

10What is the primary function of an inverter in an aircraft electrical distribution system?

A.To convert DC electrical power into AC electrical power

B.To convert AC electrical power into DC electrical power

C.To step down 115 V AC to 26 V AC

D.To protect the battery from reverse current

Explanation: An inverter converts direct current (DC) from the battery or main DC bus into alternating current (AC) for flight instruments and avionics requiring AC power.

About the CAA NZ AME Electrical Exam

The CAA NZ AME Electrical examination (Subject 1B / 11) assesses aircraft maintenance engineer candidates on electrical fundamentals (Ohm's & Kirchhoff's laws, AC/DC circuit calculations, magnetism, inductance, capacitance, transformers), aircraft power generation & distribution (DC generators, alternators, CSD/IDG, voltage regulators, RCCRs, bus bars, inverters, TRUs, lead-acid & Ni-Cad batteries), and wiring & protection (EWIS standards, circuit breakers, fuses, relays, bonding, static dischargers).

Assessment

50 multiple-choice questions administered electronically in 90 minutes.

Time Limit

90 minutes

Passing Score

70%

Exam Fee

$108 NZD (Civil Aviation Authority of New Zealand (exams via Aspeq))

CAA NZ AME Electrical Exam Content Outline

35%

Electrical Fundamentals & Circuit Calculations

Ohm's Law, Kirchhoff's Laws, series/parallel DC/AC circuits, power calculations, magnetism, inductance, capacitance, impedance, AC frequency, and transformer voltage/turns ratios.

35%

Aircraft Power Generation & Distribution

DC generators, alternators, CSD/IDG operation, GCUs, voltage regulators, reverse current cutouts, AC/DC bus bar logic, inverters, TRUs, lead-acid & Ni-Cad battery maintenance, and thermal runaway prevention.

30%

Wiring & Circuit Protection (EWIS)

Aircraft EWIS standards (AC43.13-1B / AC66-2.11), wire sizing, bundle routing, bend radii, fluid line clearance, circuit breakers, fuses, relays, contactors, structural bonding, grounding, and static dischargers.

How to Pass the CAA NZ AME Electrical Exam

What You Need to Know

Passing score: 70%
Assessment: 50 multiple-choice questions administered electronically in 90 minutes.
Time limit: 90 minutes
Exam fee: $108 NZD

Keys to Passing

Complete 500+ practice questions
Score 80%+ consistently before scheduling
Focus on highest-weighted sections
Use our AI tutor for tough concepts

CAA NZ AME Electrical Study Tips from Top Performers

1Practice solving multi-step circuit calculations (series-parallel equivalent resistance, branch current via KCL, voltage drops via KVL, and AC impedance Z).

2Memorize the operational principles of CSDs and IDGs, including the mechanical disconnect procedure that can only be reset on the ground after engine shutdown.

3Understand the thermal runaway loop in Ni-Cad batteries: high temperature reduces internal resistance, causing increased current draw during constant-voltage charging, leading to cell breakdown and fire.

4Know EWIS installation specifications: wire bundles must be clamped at max 24-inch intervals, routed ABOVE fluid lines with a minimum 2-inch (50 mm) separation, and maintain a minimum bend radius of 10 times the bundle diameter.

5Remember aircraft bonding requirements: maximum allowable bonding resistance across primary structural joints is 0.003 Ohms (3 milliohms).

Frequently Asked Questions

What is the CAA NZ AME Electrical (Subject 1B / 11) exam?

It is the official theoretical exam conducted by Aspeq for the Civil Aviation Authority of New Zealand (CAA NZ) required for Aircraft Maintenance Engineer (AME) licence certification in Electrical Systems.

What is the passing score and time duration?

The minimum passing score is 70% and candidates are allowed 90 minutes to complete the 50 multiple-choice questions.

How much does the exam cost?

The exam sitting fee is $108 NZD when booked through Aspeq.

What electrical calculation types are tested?

Candidates must perform calculations involving Ohm's Law (V=IR), Power (P=VI, P=I^2*R), series and parallel resistor combinations, inductive/capacitive reactance, impedance, and transformer voltage/turns ratios.

What battery and EWIS rules are emphasized?

Key topics include lead-acid electrolyte testing (1.285 S.G.), Ni-Cad thermal runaway mechanisms (negative temperature coefficient of resistance), AC43.13-1B wire bundle routing (clamping every 24 inches, 3-inch clearance from control cables, 2-inch clearance / routing above fluid lines), bonding resistance limit (0.003 Ohms), and static discharger physics.