Bellows Element Operation Quiz
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Questions and Answers

What is the equivalent of 15 000 feet in flight levels?

  • FL180
  • FL150 (correct)
  • FL120
  • FL200

    • What is indicated by an airspeed indicator?

  • The aircraft's altitude
  • The aircraft's ground speed
  • The aircraft's direction
  • The difference between dynamic and static pressure (correct)

    • Why is airspeed important for a pilot to maintain control of the aircraft?

  • To avoid stalling or structural damage (correct)
  • To avoid navigation errors
  • To calculate estimated time of arrival
  • To follow a specific route

    • What happens to dynamic pressure when an aircraft moves through the air?

    <p>It increases</p> Signup and view all the answers

    What is the unit of measurement for indicated airspeed?

    <p>Knots (nautical miles per hour)</p> Signup and view all the answers

    What is not a function of an airspeed indicator?

    <p>To calculate estimated time of arrival</p> Signup and view all the answers

    What is the function of the metering unit in a vertical speed indicator?

    <p>To vent static pressure to the interior of the case through a calibrated leak</p> Signup and view all the answers

    What happens to the pressure inside the capsule during a climb?

    <p>It decreases to a value less than that inside the instrument case</p> Signup and view all the answers

    What is the role of the rocking shaft and sector gear in a vertical speed indicator?

    <p>To rotate the pinion and pointer assembly</p> Signup and view all the answers

    What is the purpose of the capillary tube in a vertical speed indicator?

    <p>To supply static pressure to the inside of the capsule</p> Signup and view all the answers

    What is the position of the pointer on the dial during straight and level flight?

    <p>At the 0 feet per minute position</p> Signup and view all the answers

    What is the purpose of the leak tight case in a vertical speed indicator?

    <p>To house the mechanism and protect it from external influences</p> Signup and view all the answers

    What principle is the bellows type of element an extension of?

    <p>Corrugated diaphragm principle</p> Signup and view all the answers

    What is the purpose of employing a spring in some bellows applications?

    <p>To increase the spring-rate and assist the bellows in returning to its natural length</p> Signup and view all the answers

    What type of pressure can a bellows be used to measure?

    <p>High, low, or differential pressure</p> Signup and view all the answers

    What is the arrangement of the two bellows in a differential bellows assembly?

    <p>Push-pull arrangement</p> Signup and view all the answers

    What is the resulting pressure expression in a Sylphon type of bellows?

    <p>Absolute pressure or psia</p> Signup and view all the answers

    What is the reference point for differential pressure?

    <p>Vacuum</p> Signup and view all the answers

    How are bimetallic temperature sensors commonly used?

    <p>To compensate for temperature changes in various instruments</p> Signup and view all the answers

    What function do bimetallic strips and discs play in circuit breakers and fire detectors?

    <p>Operate switch contacts</p> Signup and view all the answers

    How does the elasticity of the capsule material in an altimeter change with variations in ambient temperature?

    <p>It increases</p> Signup and view all the answers

    In an altimeter, what occurs when the temperature decreases at sea-level?

    <p>The altimeter over-reads</p> Signup and view all the answers

    What happens to the U-shaped bracket in an altimeter when the temperature drops?

    <p>The limbs bend inwards</p> Signup and view all the answers

    How does a decrease in temperature affect error correction in the altimeter assembly?

    <p>Exerts a downward force on the capsule assembly</p> Signup and view all the answers

    What is the primary reason for fitting pitot static probe covers with a high visibility trailing warning flag while the aircraft is on the ground?

    <p>All of the above</p> Signup and view all the answers

    Why is probe alignment critical in pitot static systems?

    <p>Because it affects the accuracy of the probe</p> Signup and view all the answers

    What is the consequence of not fitting pitot static probe covers while the aircraft is on the ground?

    <p>All of the above</p> Signup and view all the answers

    What was the cause of the rejected take-off in the 2013 Airbus A330 incident in Brisbane, Australia?

    <p>Airspeed indication failure due to an insect nest</p> Signup and view all the answers

    What should take precedence over standard maintenance practices for pitot static systems?

    <p>Aircraft's maintenance manual</p> Signup and view all the answers

    What is essential when handling the pitot static probe?

    <p>Handling the probe with care to avoid bending or twisting</p> Signup and view all the answers

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