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PPL Human Performance Exam Prep

The body and mind in flight: hypoxia, vision, decision making.

Written against the published specification.

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Pass mark 9/12 30 minutes UK CAA How many can I get wrong?
About this practice. Revision Robin is built and maintained by Bloor Engineering Ltd, a UK-registered company. Our PPL Human Performance Exam Prep questions are written and reviewed in-house to match the current syllabus, each with a plain-English worked explanation. They are original practice material, not the official exam questions and not affiliated with or endorsed by UK CAA. Always confirm current test rules, fees and content with the official provider. See our Terms and Privacy.
Sit a full mock under the clock at least once. Nerves are half the battle.
Free practice questions
Try 3 real PPL Human Performance Exam Prep questions
Have a go, then reveal the worked explanation. A taster from a bank of 215 original questions. Unlock for unlimited drills and full timed mocks.
Q1. Approximately what percentage of the Earth's atmosphere at sea level is oxygen?
  • A.  21%
  • B.  78%
  • C.  16%
  • D.  1%
Show answer & explanation
✓ Answer: A. 21%
Sea level air is about 78% nitrogen, 21% oxygen, and around 1% other gases such as argon and carbon dioxide. 21% oxygen is the figure pilots must know because it applies at ALL altitudes - only the total air pressure changes, not the percentage.
Q2. Why should a pilot avoid looking directly at a faint light source at night?
  • A.  Because the fovea has no rod cells and is poor at detecting dim light
  • B.  Because the pupil constricts when staring, reducing light entry
  • C.  Because staring causes rapid rhodopsin bleaching in cones
  • D.  Because the optic disc faces forward in low light
Show answer & explanation
✓ Answer: A. Because the fovea has no rod cells and is poor at detecting dim light
At night, off-centre viewing (using peripheral retina, rich in rods) is more effective because the rod-free fovea cannot detect very dim light. This is why 'off-set viewing' is taught for spotting faint lights or other aircraft at night. Direct fixation on a faint object can make it seem to disappear.
Q3. A pilot recovers from a prolonged, coordinated spin. What vestibular illusion is this manoeuvre classically associated with?
  • A.  The graveyard spin illusion, where the pilot senses rotation has stopped before it actually has
  • B.  Somatogravic illusion of climbing
  • C.  Coriolis illusion from head movement alone
  • D.  The break-off phenomenon
Show answer & explanation
✓ Answer: A. The graveyard spin illusion, where the pilot senses rotation has stopped before it actually has
In a prolonged spin, endolymph fluid eventually matches the rotation rate, so sensation of turning fades. On recovery, the fluid continues moving briefly, giving a false sensation of spinning the opposite way (the graveyard spin), which can tempt a pilot to re-enter the original spin.
Exam mode
Full mock exam
12 random questions, real timing, marked against the official pass mark. Different every time.
The first 6 of 12 questions are free, with your score on them. Finishing the paper, your result against the pass mark and every answer explained come with the paid version.
Practice material only. This is revision practice, not official training, assessment or certification, and not a substitute for the required course or supervised experience. Always confirm the current requirements with the official awarding body or test provider before relying on it.
Try it free
Topic drills
Ten quick questions on one topic, marked instantly with explanations.
1 free drill left.
Oxygen, hypoxia & the atmosphere · 35
Vision, hearing & spatial disorientation · 41
G-forces, motion sickness & the ear · 35
Fitness, medication, alcohol & fatigue · 33
Stress, workload & decision making · 36
Threat & error management · 35

Who has to sit the PPL Human Performance Exam Prep

Who needs a PPL Human Performance Exam Prep?

All students pursuing a UK Private Pilot Licence (PPL(A) or PPL(H)). Also required for ICAO/EASA PPL conversion to UK Part-FCL PPL(A)

The real PPL Human Performance Exam Prep: format

How many questions are in the PPL Human Performance Exam Prep?

The real PPL Human Performance Exam Prep has 12 questions and lasts 25 minutes. Our mock uses 12 questions in 30 minutes.

What is the PPL Human Performance Exam Prep pass mark?

Real exam pass mark: 75%. Our mock marks you at 9 out of 12, the threshold we mark against.

What it costs, and what a resit costs

How much does the PPL Human Performance Exam Prep cost?

Real exam fee: £30-£60. Resit fee: £30-£60. Rebooking after a fail: Immediate portal lockout; 3-month ban after 4th failure (all passes void)

How hard is it

How hard is the PPL Human Performance Exam Prep?

Difficulty: Generally considered one of the simpler PPL exams, but often underestimated due to subtle distinctions between similar concepts.

Why people fail it

Why do people fail the PPL Human Performance Exam Prep?

Figures for the real exam from vertexaisearch.cloud.google.com, checked October 2026. Fees and rules change, so confirm with the test provider before you book.
PPL Human Performance Exam Prep: common questions
Frequently asked
How long do you get?
The test is timed at 30 minutes. Our full mock runs on the same clock so you can practise your pacing.
Are these the real exam questions?
No. Our questions are original and written to match the current syllabus, so they give realistic practice without copying the official paper. Every answer comes with a plain-English explanation. Always confirm current rules and content with UK CAA.