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 (A)</p> Signup and view all the answers

What is the unit of measurement for indicated airspeed?

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

What is not a function of an airspeed indicator?

<p>To calculate estimated time of arrival (B)</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 (D)</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 (C)</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 (D)</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 (D)</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 (D)</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 (C)</p> Signup and view all the answers

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

<p>Corrugated diaphragm principle (A)</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 (B)</p> Signup and view all the answers

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

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

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

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

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

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

What is the reference point for differential pressure?

<p>Vacuum (C)</p> Signup and view all the answers

How are bimetallic temperature sensors commonly used?

<p>To compensate for temperature changes in various instruments (B)</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 (D)</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 (A)</p> Signup and view all the answers

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

<p>The altimeter over-reads (B)</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 (B)</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 (A)</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 (D)</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 (B)</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 (D)</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 (D)</p> Signup and view all the answers

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

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

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