35 Questions
What is the primary variable measured by a conventional airspeed indicator in a Machmeter?
Airspeed
How is the altitude measurement in a Machmeter related to temperature?
The altitude measurement provides the equivalent temperature in accordance with the ISA chart.
What is the purpose of the aneroid capsule in a Machmeter?
To measure altitude
How is the indicator pointer driven in a Machmeter?
Through a series of rocking shafts and levers
What is the advantage of combining a Machmeter and airspeed indicator into one instrument?
Space savings on the panel
What is the primary purpose of a cabin altimeter?
To maintain the cabin air pressure below 10,000 ft
What is the purpose of an altitude switching unit in a cabin-pressurisation system?
To transmit altitude signals to a separate alerting unit
What is the consequence of exceeding the maximum differential pressure in an aircraft?
The aircraft can rupture like an over-inflated balloon
At what altitude is oxygen not necessary for passengers in an aircraft?
10,000 ft
What is the typical cruising altitude of an aircraft?
30,000 ft
Why must instrument filters and system filters be checked, cleaned or changed at regular intervals?
To prevent dirt and dust from accumulating
What should be done when caging a gyro?
Align the gimbals at 90° to each other with a single steady action
Why should gyros be handled with care?
Gyros are relatively fragile instruments
How should a gyro be transported to and from an aircraft?
In its original shipping container or hand-carried upright
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
What is essential to ensure when performing maintenance on or around direct-reading compasses or flux valves?
Using only non-ferrous tools
Why should non-ferrous panels and screws be used in the vicinity of direct-reading compasses and flux valves?
To prevent magnetic interference
What is the purpose of using screened cable or twisted pair for compass light electrical leads?
To cancel magnetic effects
Where should an aircraft compass be swung to ensure accurate readings?
In an area free from unusual magnetic influences
What is the primary precaution to take when handling direct-reading compasses or flux valves?
Avoiding exposure to magnetic fields
What is the primary limitation of using satellite communication systems in aircraft?
Weight and space requirements
What is the primary advantage of using satellite communication systems over traditional radio links?
Unlimited data transmission capacity
What is the primary function of a transceiver in a passenger communication system?
To convert phone signals to radio signals
How are satellite calls typically routed?
Via an orbiting satellite to a satellite earth station
What is the primary requirement for full duplex operation in a satellite communication system?
A full suite of hardware for both transmitter and receiver
What is the minimum number of autopilot systems required for an aircraft capable of Autoland?
Two
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
What is the purpose of additional rack-mounted units in an autopilot system?
To monitor autopilot operation and provide automatic trim control
What happens when one autopilot disengages in a Fail Passive system during Autoland?
The automatic landing cannot continue
How are the computer units of each autopilot system typically mounted?
In a rack-mounted configuration
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
What is the risk of over exposure to radiation from antennas?
It can cause serious health problems
What is the function of marker transmitters in an Instrument Landing System?
To indicate the aircraft's position at intervals along the approach path
What is the Instrument Landing System (ILS) composed of?
Ground-based and airborne equipment
What is a potential hazard of touching antennas or metallic objects near operating antennas?
Electric shock or RF burns
This quiz covers the composition of atmospheric gases, atmospheric pressure, and its effects on the earth's surface. Learn about the proportions of gases in the atmosphere and how the weight of the atmosphere affects air pressure. Test your knowledge of atmospheric science and aerodynamics!
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