Aneroid Barometer Overview

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Questions and Answers

In a non-sensitive altimeter, how many pointers does it typically have?

  • Four pointers
  • Three pointers
  • One pointer (correct)
  • Two pointers

What component of the altimeter system is responsible for detecting changes in static pressure?

  • Stack of aneroid capsules (correct)
  • Magnification gearing
  • Lever system
  • Static vent

What purpose does the sector gears serve in the altimeter system?

  • Measuring the cabin pressure
  • Coupling with the lever system
  • Converting linear dimension changes to rotary motion (correct)
  • Detecting changes in altitude

Where is the single port located in a non-sensitive altimeter case?

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

What altitude increment does one complete revolution of the pointer in a non-sensitive altimeter typically represent?

<p>10,000 ft (B)</p> Signup and view all the answers

What is the purpose of the strong leaf spring in an aneroid barometer?

<p>To prevent the total collapse of the aneroid capsule (C)</p> Signup and view all the answers

What happens to the aneroid capsule as the atmospheric pressure increases?

<p>It compresses due to the increased pressure (A)</p> Signup and view all the answers

What is the purpose of calibrating an aneroid barometer?

<p>To measure absolute pressure (C)</p> Signup and view all the answers

What is the advantage of using multiple aneroid capsules in a stack format?

<p>It increases the sensitivity and accuracy of the instrument (A)</p> Signup and view all the answers

What is the purpose of the scale markings on an aneroid altimeter?

<p>To indicate the height of the aircraft above sea level (A)</p> Signup and view all the answers

What is the function of the linkages and gears in an aneroid instrument?

<p>To drive an instrument pointer (B)</p> Signup and view all the answers

What is the purpose of the bimetallic U bracket?

<p>To act as a spring and compensate for temperature changes (B)</p> Signup and view all the answers

What is the function of the pitot tube?

<p>To measure ram pressure of the airstream (B)</p> Signup and view all the answers

Where are the static ports typically located?

<p>Along the sides of the fuselage (D)</p> Signup and view all the answers

What is the purpose of the electric heaters in a pitot/static tube?

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

What type of pressure does the pitot tube measure?

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

What is the pitot static system used for?

<p>To supply pitot and static pressure for the instruments (A)</p> Signup and view all the answers

What is the Mach number equivalent at 30 000 feet?

<p>Mmo equivalent of 236 knots (D)</p> Signup and view all the answers

Why is in-flight behaviour a crucial cause for concern at high speeds?

<p>Due to the characteristics of airflow over an aerofoil (C)</p> Signup and view all the answers

What is the ratio of the speed of the aircraft to the speed of sound known as?

<p>Mach number (D)</p> Signup and view all the answers

What is the primary reason aircraft can attain greater flying speeds with the advent of the gas turbine?

<p>Increased propulsive power (B)</p> Signup and view all the answers

What is the purpose of a Machmeter?

<p>To display the Mach number (B)</p> Signup and view all the answers

What factors affect the speed of sound?

<p>Atmospheric temperature and air pressure (A)</p> Signup and view all the answers

What is the purpose of the two screws in the unpainted area?

<p>To attach a test adaptor for static system testing (D)</p> Signup and view all the answers

What type of materials are used for the pipelines?

<p>Light alloy, Tungum, and modern plastics (D)</p> Signup and view all the answers

Why are pitot lines usually smaller in diameter than static lines?

<p>To guard against cross connection (B)</p> Signup and view all the answers

What is the purpose of colour coding the fittings?

<p>To guard against cross connection (C)</p> Signup and view all the answers

Why is it necessary to guard against water accumulation in the system?

<p>To prevent water from restricting the pipeline and causing errors (A)</p> Signup and view all the answers

What is used to identify a pipeline at regular intervals?

<p>Colour-coded tape (C)</p> Signup and view all the answers

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