ATPL Human Performance and Limitations

Question 1

Time of Useful Consciousness (TUC) at FL350 without supplemental oxygen is approximately:

Accepted Answer

30–60 seconds

Answer

At FL350 (approximately 35,000 ft), TUC is only 30–60 seconds due to the very low partial pressure of oxygen, leaving pilots very little time to don oxygen masks.

Question 2

Which of the following best describes spatial disorientation in flight?

Accepted Answer

A false perception of the aircraft's attitude, motion, or position

Answer

Spatial disorientation is a false or incorrect perception of the aircraft's position, attitude, or movement relative to the earth, caused by misleading sensory information.

Question 3

The 'leans' is a form of spatial disorientation caused by:

Accepted Answer

A gradual undetected roll with a rapid correction sensed as a new roll

Answer

The leans occur when a gradual undetected bank is corrected quickly — the rapid correction is sensed as a bank in the opposite direction, causing the pilot to feel leaned toward the original bank.

Question 4

Hypoxia at altitude primarily affects which cognitive functions first?

Accepted Answer

Higher cognitive functions including judgment and decision-making

Answer

Hypoxia impairs higher-order cognitive functions first — including judgment, reasoning, and decision-making — while the pilot may feel euphoric and unaware of impairment.

Question 5

Crew Resource Management (CRM) training primarily aims to reduce accidents caused by:

Accepted Answer

Communication breakdowns and poor decision-making in the cockpit

Answer

CRM training addresses the human factors root cause of most aviation accidents: poor communication, ineffective crew coordination, and flawed decision-making under stress.

ATPL - Airline Transport Pilot License Practice Test

ATPL - Airline Transport Pilot License Practice Test

ATPL Human Performance and Limitations