Private Pilot-human Performance And Limit 01

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  • 1/14 Questions

    The atmosphere contains:

    • About 78% oxygen
    • About 21% oxygen
    • About 78% CO
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About This Quiz

Private pilot human performance and limitation quiz
this quiz will help you pass the DCA HPL exams

Private Pilot-human Performance And Limit 01 - Quiz

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  • 2. 

    The main function of haemoglobin is to :

    • To transport carbon dioxide around the body

    • To expel unwanted carbolic acid

    • To transport oxygen around the body

    Correct Answer
    A. To transport oxygen around the body
    Explanation
    Haemoglobin is a protein found in red blood cells that binds to oxygen in the lungs and carries it to the body's tissues. This allows oxygen to be delivered to cells for metabolism and energy production. Therefore, the main function of haemoglobin is to transport oxygen around the body.

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  • 3. 

    The effect of alcohol:

    • Increase with increasing altitude

    • Decrease with increasing altitude

    • Is unaffected by decreasing altitude

    Correct Answer
    A. Increase with increasing altitude
    Explanation
    As altitude increases, the level of oxygen in the air decreases. Alcohol is a depressant that affects the central nervous system and impairs cognitive and motor functions. At higher altitudes, the body already has reduced oxygen levels, and adding alcohol further exacerbates the effects. This can lead to increased intoxication and a higher risk of alcohol-related accidents and health issues. Therefore, the effect of alcohol tends to increase with increasing altitude.

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  • 4. 

    The troposphere is the:

    • Inner layer of the atmoshere

    • Middle layer of the atmosphere

    • Outer layer of the atmosphere

    Correct Answer
    A. Inner layer of the atmoshere
    Explanation
    The troposphere is the inner layer of the atmosphere. It is the lowest layer and extends from the Earth's surface up to about 10-15 kilometers. This layer is where weather phenomena occur and where most of the Earth's air mass is located. It contains the majority of the atmosphere's gases, including oxygen, nitrogen, and carbon dioxide. The troposphere is characterized by decreasing temperature with increasing altitude, which is why it is responsible for weather patterns and the formation of clouds and precipitation.

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  • 5. 

    A rise in carbon dioxide in the blood causes:

    • A reduction in the respiration rate

    • An increase in the respiration rate

    • No change in the respiration rate

    Correct Answer
    A. An increase in the respiration rate
    Explanation
    An increase in carbon dioxide in the blood triggers a response in the body to increase respiration rate. This is because carbon dioxide is a waste product of cellular respiration and needs to be eliminated from the body. When carbon dioxide levels rise, it indicates that the body is not efficiently removing this waste product. To compensate, the body increases respiration rate to bring in more oxygen and remove carbon dioxide through exhalation, restoring the balance. Therefore, an increase in carbon dioxide in the blood causes an increase in the respiration rate.

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  • 6. 

    As a general rule,flaps must not be raised during the landing because:

    • Such action might distract the pilot from the primary task of handling the aircraft

    • In a retractable undercarriage aircraft,it is possible to raise the undercarriage by mistake

    • Both of the above

    Correct Answer
    A. Both of the above
    Explanation
    Raising the flaps during landing can be dangerous for two reasons. Firstly, it can distract the pilot from their main task of safely landing the aircraft. Secondly, in aircraft with retractable undercarriage, there is a possibility of accidentally raising the undercarriage instead of the flaps, which can lead to a loss of control or damage to the aircraft. Therefore, both of these reasons make it necessary to not raise the flaps during landing.

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  • 7. 

    Information in long term memory:

    • Has an average life of about 1 year

    • Cannot be demonstrated ever to be lost

    • Has an averagelife of 5 years

    Correct Answer
    A. Cannot be demonstrated ever to be lost
    Explanation
    The given answer states that information in long term memory cannot be demonstrated to be lost. This means that there is no evidence or proof to show that information stored in long term memory can be permanently forgotten or erased. It implies that even if we cannot recall or retrieve certain information from long term memory at a given moment, it does not necessarily mean that the information is completely lost.

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  • 8. 

    The Hazardous attitude"macho"can best be characterized by:

    • "It won't happen to me"

    • "I can do it"

    • "Don't tell me"

    Correct Answer
    A. "I can do it"
    Explanation
    The correct answer is "I can do it". The "macho" attitude is characterized by overconfidence and a belief that one is capable of handling any situation without considering the risks or consequences. This attitude can lead to reckless behavior and a disregard for safety measures.

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  • 9. 

    The most important consideration in display layout is:

    • Layout

    • Colour

    • Standardisation

    Correct Answer
    A. Standardisation
    Explanation
    Standardisation is the most important consideration in display layout because it ensures consistency and uniformity in the design. By following established standards, the layout becomes more user-friendly and familiar to the audience. Standardisation also helps in creating a cohesive and professional look, making it easier for users to navigate and understand the information presented. It allows for efficient communication and reduces confusion, ultimately enhancing the overall user experience.

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  • 10. 

    The body is normaly saturated with what gas:

    • O2

    • CO2

    • N

    Correct Answer
    A. O2
    Explanation
    The correct answer is O2 because oxygen is the most abundant gas in the Earth's atmosphere, making up about 21% of the air we breathe. It is essential for the survival of most living organisms as it is involved in cellular respiration, providing energy for metabolic processes. Oxygen is transported through the bloodstream and is used by cells to produce ATP, the energy currency of the body.

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  • 11. 

    The eye adapts to differing light levels by:

    • Chemical changes in the retina

    • Chemical changes in the pupil.

    • The lens becomes progressively opaque

    Correct Answer
    A. Chemical changes in the retina
    Explanation
    The retina is responsible for detecting light and converting it into electrical signals that the brain can interpret. When light levels change, the cells in the retina undergo chemical changes to adjust the sensitivity of the eye. This allows the eye to function optimally in both bright and dim lighting conditions. Chemical changes in the pupil and the lens do not directly contribute to the eye's adaptation to light levels.

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  • 12. 

    Susceptibility to hypoxia is increased by:

    • Cold

    • Heat

    • Inactivity

    Correct Answer
    A. Cold
    Explanation
    Cold temperatures can increase susceptibility to hypoxia. When exposed to cold, the body constricts blood vessels in order to conserve heat and maintain core body temperature. This constriction can reduce blood flow to certain areas, including the lungs, leading to decreased oxygen supply. Additionally, cold air can cause irritation and inflammation in the airways, making it harder for oxygen to reach the bloodstream. Therefore, cold temperatures can exacerbate the effects of hypoxia and make individuals more susceptible to its symptoms.

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  • 13. 

    Exercise:

    • Increases oxygen demand and increases the degree of hypoxia

    • Increases blood flow and protects against hypoxia

    • Does not effect the susceptiblity to hypoxia

    Correct Answer
    A. Increases oxygen demand and increases the degree of hypoxia
    Explanation
    This answer suggests that the given exercise increases the demand for oxygen in the body and also increases the severity of hypoxia, which is a condition characterized by a lack of oxygen supply to the tissues. This means that the exercise puts additional strain on the body's oxygen resources and exacerbates the already existing oxygen deficiency.

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  • 14. 

    An approaching aircraft that is on a constant bearing represents:

    • Absolutely no risk of collision

    • The least risk of collision

    • The greatest risk of collision

    Correct Answer
    A. Absolutely no risk of collision
    Explanation
    An approaching aircraft that is on a constant bearing represents absolutely no risk of collision because when two objects are on a constant bearing, it means they are on a collision course and will eventually collide. Therefore, if the approaching aircraft is on a constant bearing, it indicates that it will not collide with the other aircraft, eliminating any risk of collision.

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  • Current Version
  • Jun 03, 2024
    Quiz Edited by
    ProProfs Editorial Team
  • Jan 26, 2009
    Quiz Created by
    Pilot4001
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