Atmospheric Composition and Pressure

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What is the primary variable measured by a conventional airspeed indicator in a Machmeter?

Altitude

Temperature

Airspeed (correct)

Pressure difference

How is the altitude measurement in a Machmeter related to temperature?

The altitude measurement affects the speed of sound.

The altitude measurement is directly proportional to temperature.

The altitude measurement provides the equivalent temperature in accordance with the ISA chart. (correct)

The altitude measurement is independent of temperature.

What is the purpose of the aneroid capsule in a Machmeter?

To measure pressure difference

To measure airspeed

To measure temperature

To measure altitude (correct)

How is the indicator pointer driven in a Machmeter?

Through a series of rocking shafts and levers Signup and view all the answers

What is the advantage of combining a Machmeter and airspeed indicator into one instrument?

Space savings on the panel Signup and view all the answers

What is the primary purpose of a cabin altimeter?

To maintain the cabin air pressure below 10,000 ft Signup and view all the answers

What is the purpose of an altitude switching unit in a cabin-pressurisation system?

To transmit altitude signals to a separate alerting unit Signup and view all the answers

What is the consequence of exceeding the maximum differential pressure in an aircraft?

The aircraft can rupture like an over-inflated balloon Signup and view all the answers

At what altitude is oxygen not necessary for passengers in an aircraft?

10,000 ft Signup and view all the answers

What is the typical cruising altitude of an aircraft?

30,000 ft Signup and view all the answers

Why must instrument filters and system filters be checked, cleaned or changed at regular intervals?

To prevent dirt and dust from accumulating Signup and view all the answers

What should be done when caging a gyro?

Align the gimbals at 90° to each other with a single steady action Signup and view all the answers

Why should gyros be handled with care?

Gyros are relatively fragile instruments Signup and view all the answers

How should a gyro be transported to and from an aircraft?

In its original shipping container or hand-carried upright Signup and view all the answers

What should be ensured when packing a gyroscope for shipping?

There is at least 100 mm of foam rubber between the gyroscope and the shipping container Signup and view all the answers

What is essential to ensure when performing maintenance on or around direct-reading compasses or flux valves?

Using only non-ferrous tools Signup and view all the answers

Why should non-ferrous panels and screws be used in the vicinity of direct-reading compasses and flux valves?

To prevent magnetic interference Signup and view all the answers

What is the purpose of using screened cable or twisted pair for compass light electrical leads?

To cancel magnetic effects Signup and view all the answers

Where should an aircraft compass be swung to ensure accurate readings?

In an area free from unusual magnetic influences Signup and view all the answers

What is the primary precaution to take when handling direct-reading compasses or flux valves?

Avoiding exposure to magnetic fields Signup and view all the answers

What is the primary limitation of using satellite communication systems in aircraft?

Weight and space requirements Signup and view all the answers

What is the primary advantage of using satellite communication systems over traditional radio links?

Unlimited data transmission capacity Signup and view all the answers

What is the primary function of a transceiver in a passenger communication system?

To convert phone signals to radio signals Signup and view all the answers

How are satellite calls typically routed?

Via an orbiting satellite to a satellite earth station Signup and view all the answers

What is the primary requirement for full duplex operation in a satellite communication system?

A full suite of hardware for both transmitter and receiver Signup and view all the answers

What is the minimum number of autopilot systems required for an aircraft capable of Autoland?

Two Signup and view all the answers

What is the primary characteristic of a Fail Passive autopilot system?

It provides a warning and allows the aircraft to default to a stable condition Signup and view all the answers

What is the purpose of additional rack-mounted units in an autopilot system?

To monitor autopilot operation and provide automatic trim control Signup and view all the answers

What happens when one autopilot disengages in a Fail Passive system during Autoland?

The automatic landing cannot continue Signup and view all the answers

How are the computer units of each autopilot system typically mounted?

In a rack-mounted configuration Signup and view all the answers

What is the purpose of the localizer and glideslope signals in an Instrument Landing System?

To provide lateral and vertical guidance to an aircraft during approach Signup and view all the answers

What is the risk of over exposure to radiation from antennas?

It can cause serious health problems Signup and view all the answers

What is the function of marker transmitters in an Instrument Landing System?

To indicate the aircraft's position at intervals along the approach path Signup and view all the answers

What is the Instrument Landing System (ILS) composed of?

Ground-based and airborne equipment Signup and view all the answers

What is a potential hazard of touching antennas or metallic objects near operating antennas?

Electric shock or RF burns Signup and view all the answers

Atmospheric Composition and Pressure

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Questions and Answers

What is the primary variable measured by a conventional airspeed indicator in a Machmeter?

How is the altitude measurement in a Machmeter related to temperature?

What is the purpose of the aneroid capsule in a Machmeter?

How is the indicator pointer driven in a Machmeter?

What is the advantage of combining a Machmeter and airspeed indicator into one instrument?

What is the primary purpose of a cabin altimeter?

What is the purpose of an altitude switching unit in a cabin-pressurisation system?

What is the consequence of exceeding the maximum differential pressure in an aircraft?

At what altitude is oxygen not necessary for passengers in an aircraft?

What is the typical cruising altitude of an aircraft?

Why must instrument filters and system filters be checked, cleaned or changed at regular intervals?

What should be done when caging a gyro?

Why should gyros be handled with care?

How should a gyro be transported to and from an aircraft?

What should be ensured when packing a gyroscope for shipping?

What is essential to ensure when performing maintenance on or around direct-reading compasses or flux valves?

Why should non-ferrous panels and screws be used in the vicinity of direct-reading compasses and flux valves?

What is the purpose of using screened cable or twisted pair for compass light electrical leads?

Where should an aircraft compass be swung to ensure accurate readings?

What is the primary precaution to take when handling direct-reading compasses or flux valves?

What is the primary limitation of using satellite communication systems in aircraft?

What is the primary advantage of using satellite communication systems over traditional radio links?

What is the primary function of a transceiver in a passenger communication system?

How are satellite calls typically routed?

What is the primary requirement for full duplex operation in a satellite communication system?

What is the minimum number of autopilot systems required for an aircraft capable of Autoland?

What is the primary characteristic of a Fail Passive autopilot system?

What is the purpose of additional rack-mounted units in an autopilot system?

What happens when one autopilot disengages in a Fail Passive system during Autoland?

How are the computer units of each autopilot system typically mounted?

What is the purpose of the localizer and glideslope signals in an Instrument Landing System?

What is the risk of over exposure to radiation from antennas?

What is the function of marker transmitters in an Instrument Landing System?

What is the Instrument Landing System (ILS) composed of?

What is a potential hazard of touching antennas or metallic objects near operating antennas?

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