PPL (A) Human Performance & Limitations (P)

Color-blindness or, more accurately, color-defective vision, is caused by: A defect in the structure of the color-sensitive cones in the retina. A defect in the lens tissue of the eye. Defective functioning of the ciliary muscles. A foreshortened eyeball.

Which of the following should a pilot primarily rely on if he becomes disorientated in Visual Meteorological Conditions?. His sense of sight. Turning the head to recover from disorientation. His sense of balance. The aircraft's instruments.

What is the purpose of the Eustachian tube?. To allow ambient pressure to equalise on both sides of the ear drum. To pass sound waves across the middle ear to the auditory nerve. To allow ambient pressure to equalise on the middle ear side of the ear drum. To allow ambient pressure to equalise on both sides of the vestibular apparatus.

Good briefings are very important. Which of the following could be the result of a bad briefing?. Increased uncertainty. Good transfer of knowledge. Good understanding of information. Decreased uncertainty.

Which statement concerning hypoxia is true?. Tingling of the skin and a false sense of security may be symptoms of hypoxia. Hypoxia is caused by nitrogen bubbles in the joints and bloodstream. Forcing oneself to concentrate on the flight instruments will help to overcome the effects. Of hypoxia.

The best method to use when looking for other traffic at night is to. Look to the side of the object and scan slowly. Scan the visual field very rapidly. Look to the side of the object and scan rapidly.

At altitude the pressure of oxygen in the atmosphere is: Lower than at MSL. The same as at mean sea level (MSL). Higher than at MSL. Unaffected, as partial pressure is independent of altitude.

If the atmospheric pressure decreases, the partial pressure of the oxygen in the atmosphere will: Decrease. Increase. Stay the same. Not be affected as it is independent of atmospheric pressure.

Which of the following gases regulate the rate and depth of breathing, depending on the levels at which the gas is present in the blood?. Carbon Dioxide. Oxygen. Nitrogen. Carbon Monoxide.

After donating blood, what is the minimum time a pilot should wait before flying?. 24 hours. 2 hours. 12 hours. 48 hours.

A likely symptom, or likely symptoms, of Hypoxia might be: All of the above. Unconsciousness. Impaired judgment. Tingling fingers and toes.

During a climb to 18,000 ft, the percentage of oxygen in the atmosphere. Remains the same. Increases. Decreases.

The most effective technique to use for detecting other aircraft at night is to avoid staring directly at the point where another aircraft is suspected to be flying. Turn the head and sweep the eyes rapidly over the entire visible region. Avoid scanning the region below the horizon so as to avoid the effect on ground light on. The eyes.

What effect does haze have on the ability to see traffic or terrain features during flight?. All traffic or terrain features appear to be farther away than their actual distance. Haze causes the eyes to focus at infinity. The eyes tend to overwork in haze and do not detect relative movement easily.

In order to see a sharp image of an oncoming aircraft which has been detected by the eye, a pilot should: Look directly at the oncoming aircraft. Look to one side of the oncoming aircraft. Commence a systematic scan of the airspace in front of him. Blink several times to make the image clearer.