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Key Facts: CAA NZ CPL Human Factors Exam

120 Mins

Total duration allowed for the Aspeq examination.

Aspeq NZ CAA Exam Guide

70%

Minimum pass mark required by CAA NZ.

CAA NZ Advisory Circular AC61

$108 NZD

Exam fee per sitting via Aspeq.

Aspeq Schedule of Fees

5 Domains

Covers physiology, sensory systems, psychology, CRM/TEM, and fatigue.

CAA NZ CPL HF Syllabus

CAA NZ CPL Human Factors is a 120-minute examination administered via Aspeq requiring a 70% pass mark for CPL candidates in New Zealand.

Sample CAA NZ CPL Human Factors Practice Questions

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

1Hypoxic hypoxia at high altitudes is primarily caused by which physiological or atmospheric factor?

A.A reduction in the partial pressure of atmospheric oxygen despite oxygen concentration remaining constant at approximately 21%

B.A decrease in the percentage concentration of ambient oxygen molecules in the atmosphere above 10,000 feet

C.An inability of hemoglobin molecules to release bound oxygen to tissue cells due to carbon monoxide exposure

D.Reduced cerebral blood circulation resulting from high positive G-forces during maneuver flight

Explanation: Hypoxic hypoxia occurs when the partial pressure of oxygen (PO2) drops due to decreasing atmospheric pressure at higher altitudes. Although oxygen concentration remains around 21% up to high altitudes, the reduced partial pressure prevents adequate oxygen diffusion across alveolar membranes.

2A pilot experiencing carbon monoxide (CO) poisoning from a leaking exhaust heater suffers from which specific type of hypoxia?

A.Hypoxic hypoxia

B.Anaemic (hypemic) hypoxia

C.Stagnant hypoxia

D.Histotoxic hypoxia

Explanation: Carbon monoxide binds to hemoglobin with an affinity approximately 200 times greater than oxygen, forming carboxyhemoglobin. This reduces the blood's oxygen-carrying capacity, resulting in anaemic (hypemic) hypoxia.

3Which type of hypoxia is induced when excessive positive G-forces pool blood in the lower limbs, reducing blood flow to the brain?

A.Hypoxic hypoxia

B.Anaemic hypoxia

C.Stagnant hypoxia

D.Histotoxic hypoxia

Explanation: Stagnant hypoxia occurs when blood circulation is restricted or pooling prevents oxygenated blood from reaching vital organs such as the brain, common during steep turns or high G-force maneuvers.

4Why does alcohol consumption before a flight induce histotoxic hypoxia even when flying at sea level with normal oxygen levels?

A.Alcohol reduces the partial pressure of oxygen in the lungs

B.Alcohol destroys red blood cells and prevents hemoglobin synthesis

C.Alcohol constricts cerebral arteries, cutting off blood supply

D.Alcohol poisons tissue cells, preventing them from utilizing oxygen delivered by the blood

Explanation: Histotoxic hypoxia occurs when tissue cells are poisoned (e.g., by alcohol, narcotics, or cyanide) and are rendered incapable of accepting or processing oxygen delivered by normal blood flow.

5What is the typical Time of Useful Consciousness (TUC) for a pilot at 30,000 feet following a sudden decompression?

A.20 to 30 minutes

B.3 to 5 minutes

C.1 to 2 minutes

D.15 to 20 seconds

Explanation: At FL300 (30,000 feet), the Time of Useful Consciousness (TUC) during normal flight is approximately 1 to 2 minutes. Following rapid decompression, TUC can be reduced by up to 50%.

6Hyperventilation causes which primary physiological change in the blood?

A.Hypocapnia, resulting in blood alkalosis due to excessive loss of carbon dioxide

B.Hypercapnia, resulting in blood acidosis due to accumulation of carbon dioxide

C.Severe drop in arterial oxygen saturation below 50%

D.Rapid destruction of blood platelets leading to impaired clotting

Explanation: Hyperventilation involves rapid or deep breathing that exhales carbon dioxide faster than body cells produce it. This leads to low blood CO2 (hypocapnia) and raises blood pH (alkalosis).

7Which classic symptoms are shared by both hypoxia and hyperventilation, making them difficult to distinguish in flight?

A.Cyanosis, severe euphoria, and increased night vision clarity

B.Lightheadedness, dizziness, tingling in extremities, and impaired judgment

C.Severe joint pain, skin itching, and sudden chest pain

D.Loss of high-frequency hearing, skin rash, and hyperthermia

Explanation: Dizziness, lightheadedness, tingling in fingers and toes (paresthesia), and cognitive confusion occur in both hypoxia and hyperventilation, requiring pilots to treat for hypoxia immediately by selecting 100% oxygen under pressure.

8Which gas law explains the evolution of nitrogen bubbles in body tissues during decompression sickness (DCS)?

A.Boyle's Law

B.Henry's Law

C.Dalton's Law

D.Charles's Law

Explanation: Henry's Law states that the amount of gas dissolved in a liquid is proportional to the partial pressure of that gas above the liquid. As ambient pressure drops rapidly, dissolved nitrogen comes out of solution forming bubbles.

9According to general aviation medical guidelines, how long should a pilot wait to fly after a non-decompression scuba dive?

A.At least 4 hours

B.At least 12 hours

C.At least 24 hours

D.At least 48 hours

Explanation: Standard recommended waiting periods after scuba diving are at least 12 hours for dives not requiring controlled decompression stops when flying up to 8,000 feet, and at least 24 hours after dives requiring decompression stops.

10Which organ of the inner ear detects angular (rotational) acceleration?

A.Semicircular canals

B.Utricle and saccule (otolith organs)

C.Cochlea

D.Eustachian tube

Explanation: The three semicircular canals arranged at right angles to each other detect angular acceleration in roll, pitch, and yaw through fluid (endolymph) movement against hair cells in the cupula.

About the CAA NZ CPL Human Factors Exam

The CAA NZ CPL Human Factors examination assesses commercial pilot candidates in New Zealand on flight physiology (hypoxia, TUC, hyperventilation, spatial disorientation, illusions, DCS), aviation psychology (CRM, TEM, automation bias, workload management, fatigue, sleep hygiene, shift work, DECIDE and SHEL models, cockpit ergonomics).

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

Multiple-choice exam delivered via Aspeq CBT in 120 minutes.

Time Limit

120 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%

Aviation Physiology & Altitude Factors

Hypoxia types (hypoxic, anaemic, stagnant, histotoxic), time of useful consciousness (TUC), hyperventilation, decompression sickness, and gas expansion.

25%

Sensory Systems & Spatial Disorientation

Vestibular illusions (somatogyral and somatogravic), visual and optical illusions on approach, night vision, and spatial disorientation recovery.

20%

Aviation Psychology & Cognitive Performance

Information processing, memory models, attention, situational awareness, workload management, automation bias, and ergonomics (SHEL model).

15%

CRM, TEM & Aeronautical Decision Making

Crew Resource Management (CRM), Threat and Error Management (TEM), communication barriers, assertiveness, and decision-making models (DECIDE).

10%

Fatigue, Sleep & Health Management

Sleep architecture, circadian rhythms, shift work, fatigue mitigation, alertness management, drugs/alcohol, and stress management.

Preparing for the CAA NZ CPL Human Factors Exam

What You Need to Know

Passing score: 70%
Assessment: Multiple-choice exam delivered via Aspeq CBT in 120 minutes.
Time limit: 120 minutes
Exam / certification fees: $108 NZD Official sources

Using Our Practice Resources

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CAA NZ CPL Human Factors: Suggested Study Strategy

1Distinguish clearly between the 4 types of hypoxia (hypoxic, anaemic/hypemic, stagnant, histotoxic) and their underlying causes.

2Memorize TUC (Time of Useful Consciousness) at key altitudes: 18,000 ft (20-30 mins), 25,000 ft (3-5 mins), 30,000 ft (1-2 mins), 35,000 ft (30-60 secs), 40,000 ft (15-20 secs).

3Understand somatogravic illusions (false sensation of pitch up during acceleration, pitch down during deceleration) and somatogyral illusions (the leans, Coriolis, graveyard spiral).

4Recognize approach visual illusions: narrower runway gives illusion of being too high, up-sloping runway gives illusion of being too high, down-sloping runway gives illusion of being too low.

5Understand the SHEL model components (Software, Hardware, Environment, Liveware) and how interfaces impact human performance.

6Master the TEM framework: Threats (Environmental vs Organizational), Errors (Handling, Procedural, Communication), and Undesired Aircraft States (UAS).

Frequently Asked Questions

What is the CAA NZ CPL Human Factors exam?

It is a theoretical examination conducted by Aspeq for the Civil Aviation Authority of New Zealand (CAA NZ) required for obtaining a Commercial Pilot Licence (CPL).

What is the pass mark for CAA NZ CPL Human Factors?

The minimum passing score is 70%.

How long is the exam and how is it delivered?

The exam is 2 hours (120 minutes) long, delivered as a computer-based test (CBT) by Aspeq.

How much does the exam cost?

The exam sitting fee is $108 NZD via Aspeq.

What topics are emphasized in the Human Factors syllabus?

The syllabus covers flight physiology (hypoxia types, TUC, hyperventilation, spatial disorientation, optical illusions, DCS) and aviation psychology (CRM, TEM, automation bias, workload, sleep, shift work, DECIDE/SHEL models, ergonomics).