Aneroid Barometer Overview

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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?

Rear Signup and view all the answers

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

10,000 ft Signup and view all the answers

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

To prevent the total collapse of the aneroid capsule Signup and view all the answers

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

It compresses due to the increased pressure Signup and view all the answers

What is the purpose of calibrating an aneroid barometer?

To measure absolute pressure Signup and view all the answers

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

It increases the sensitivity and accuracy of the instrument Signup and view all the answers

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

To indicate the height of the aircraft above sea level Signup and view all the answers

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

To drive an instrument pointer Signup and view all the answers

What is the purpose of the bimetallic U bracket?

To act as a spring and compensate for temperature changes Signup and view all the answers

What is the function of the pitot tube?

To measure ram pressure of the airstream Signup and view all the answers

Where are the static ports typically located?

Along the sides of the fuselage Signup and view all the answers

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

To prevent icing Signup and view all the answers

What type of pressure does the pitot tube measure?

Ram pressure Signup and view all the answers

What is the pitot static system used for?

To supply pitot and static pressure for the instruments Signup and view all the answers

What is the Mach number equivalent at 30 000 feet?

Mmo equivalent of 236 knots Signup and view all the answers

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

Due to the characteristics of airflow over an aerofoil Signup and view all the answers

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

Mach number Signup and view all the answers

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

Increased propulsive power Signup and view all the answers

What is the purpose of a Machmeter?

To display the Mach number Signup and view all the answers

What factors affect the speed of sound?

Atmospheric temperature and air pressure Signup and view all the answers

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

To attach a test adaptor for static system testing Signup and view all the answers

What type of materials are used for the pipelines?

Light alloy, Tungum, and modern plastics Signup and view all the answers

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

To guard against cross connection Signup and view all the answers

What is the purpose of colour coding the fittings?