Avielevate / DGCA CPL papers / Air Regulations / Investigation, Security and Human Performance
Investigation, Security and Human Performance — DGCA CPL Air Regulations
Chapter 05 of the Air Regulations paper. 518 practice questions in the Avielevate bank, every one with its answer key, filterable into a timed set on this chapter alone.
What this chapter covers
The learning objectives we file Investigation, Security and Human Performance questions under, and how many sit behind each. These come straight out of the bank and are regenerated whenever it changes — they are what is there today, not a claim.
| Learning objective | In the bank |
|---|
| 0110 Search & Rescue | 66 questions |
| 0119 Aircraft Accident & Incident Investigation | 87 questions |
| 0120 Facilitation | 65 questions |
| 0121 Aviation Security | 85 questions |
| 0122 Human Performance: Accident Statistics & Causation | 5 questions |
| 0123 Human Performance: Human Error, CRM & SHEL Model | 22 questions |
| 0124 Human Performance: Stress, Attention & Perception | 65 questions |
| 0125 Aviation Medicine & Physiology | 123 questions |
Sample Investigation, Security and Human Performance questions, answered and explained
Real questions from this chapter, with the answer marked and the reasoning written out — the same explanations you get inside the app.
010026 · Investigation, Security and Human Performance
The main and most trustworthy sense used for spatial orientation is ___, while the balance sensors located in the ___ provide a secondary system.
- AEar, Eyesight.
- BEyesight, ear.
- CVestibular apparatus, Somatosensory system.
- DVestibular apparatus, eyesight.
Why that is the answer
Among the three systems humans use for spatial orientation — vision, the vestibular apparatus (inner ear balance organs), and the somatosensory ('seat of the pants') system — vision is universally taught as the primary and most reliable, because it provides continuous, accurate reference to the true horizon and surroundings, especially critical in flight where the other senses are easily fooled by sustained accelerations. The vestibular apparatus, housed in the inner ear (semicircular canals and otoliths), acts as a secondary balance-sensing system, but it is prone to illusions (the leans, Coriolis illusion, graveyard spiral) particularly without visual reference in IMC. Option A reverses the order, and option C substitutes different (though related) terminology that does not match the ear/eyesight pairing asked for. Per the verified key, the correct answer is B: eyesight is primary, the ear (vestibular apparatus) is the secondary balance system.
- Identify the concept: the hierarchy of human spatial orientation senses.
- Recall the three senses involved: vision, vestibular (inner ear), and somatosensory.
- Recall that vision is taught as the primary, most reliable sense; the inner ear provides a secondary balance system.
- Eliminate A (reverses primary/secondary) and C (uses non-matching terminology for this blank pairing).
- Conclude the correct answer is B: Eyesight, ear.
010077 · Investigation, Security and Human Performance
Per ICAO Annex 9, when a passenger and baggage arrive at an aerodrome, the State is requested to…
- AAdopt border control regulations suited to air transport and avoid unnecessary delays.
- BPrevent any delays caused by increased border and baggage controls.
- CGive priority inspection to first-class ticket holders.
- DPerform at least a double border control, with no time limitation on resulting delays.
Why that is the answer
Annex 9 requires States to tailor border control to air transport's needs and avoid unnecessary delay, not to guarantee zero delay or priority by ticket class.
- ICAO Annex 9 (Facilitation) sets standards to expedite the clearance of aircraft, crew, passengers, and cargo, minimising formalities at aerodromes.
- States are required to adopt border control procedures appropriate to the special characteristics of air transport, and to avoid or minimise unnecessary delays for arriving passengers and baggage.
- Preventing 'any' delay from increased controls (B) is an absolute guarantee Annex 9 does not make; priority for first-class ticket holders (C) is a discriminatory outcome not required by the standard.
- A mandatory 'at least double' border control with no time limit (D) directly contradicts the facilitation objective of minimising delay.
- Correct: A.
010092 · Investigation, Security and Human Performance
The body's core temperature varies across the 24-hour circadian cycle. At roughly what clock time does it reach its lowest point?
- A19:30
- B14:30
- C04:30
- D23:00
Why that is the answer
The human circadian rhythm drives a predictable daily oscillation in core body temperature, typically ranging about 1-1.5 degrees Celsius across 24 hours. The trough of this cycle occurs during the deepest part of the night's sleep, in the pre-dawn hours, generally between about 03:00 and 05:00. This is also the period of greatest physiological low point - lowest alertness, slowest reaction time and greatest risk of error and sleepiness-related incidents, which is why this window is heavily emphasised in fatigue and CRM training for pilots on night operations. Body temperature then begins rising again well before wake-up, preparing the body for activity. 19:30 and 14:30 are both within the normal waking period, when temperature is near or approaching its peak, not its trough, so those options do not fit the known thermoregulatory curve. Per the verified answer key, the temperature minimum occurs at approximately 04:30, making C correct.
- Identify the topic: circadian rhythm and core body temperature variation.
- Recall that body temperature follows a 24-hour sinusoidal pattern with a well-documented nadir during deep night sleep.
- Apply this to the given times: 19:30 and 14:30 fall in waking hours when temperature is high or rising.
- Eliminate A and B as they are outside the known low-temperature window.
- 04:30 falls within the accepted pre-dawn trough period.
- Conclude the correct answer is C.
Free while we are testing
Avielevate is in an open testing period — nobody is being charged. Create an account, fill in
the short form on the pricing page, and we switch on three months of full access: the whole
bank, timed mock exams, explanations and weak-topic analytics.
Avielevate is a preparation tool. Always study alongside the official DGCA
publications and the approved reference material for your course.
Frequently asked
How many Investigation, Security and Human Performance questions are there for the DGCA CPL Air Regulations paper?
Avielevate's bank carries 518 published Investigation, Security and Human Performance questions for Air Regulations, mapped across 8 learning objectives. Every one has its answer key, and explanations are being written across the whole bank.
How much of the Air Regulations paper is Investigation, Security and Human Performance?
The DGCA does not publish a per-chapter breakdown of its papers, so nobody can honestly tell you — and we will not guess. What we can tell you is what students who have just sat a paper reported meeting, which is measured rather than rumoured: that is the exam recall report inside the app.
What is the best way to revise Investigation, Security and Human Performance?
Sit a short timed set on this chapter alone, tag how sure you were of each answer, then drill the two that actually leak marks: the ones you got right while guessing, and the ones you got wrong while confident. Avielevate does that tagging for you and puts anything you got wrong back in front of you on a spaced schedule.
The rest of the Air Regulations paper
One account covers every chapter of every paper.
← All Air Regulations chapters · All six DGCA CPL papers