30 Questions
What is the primary function of the pitot probe in an aircraft?
To measure airspeed
What is the purpose of the calibrated drain hole in the pitot probe?
To negate the effect of moisture on airspeed readings
What is the term used to describe the detecting element that measures static pressure?
Static port
What is the purpose of the electrical heater element in the pitot probe?
To prevent moisture from freezing
In some light aircraft, what is the static vent often simply?
A hole drilled in the fuselage skin
What is the result of the airstream coming to rest within the pitot probe?
The creation of additional pressure
What connects the capsule’s interior to the pitot line of the aircraft’s pitot static system?
Capillary tube
As the aircraft increases in altitude, what happens to the static pressure?
It decreases
What is the purpose of the temperature compensating ranging lever in the airspeed indicator?
To correct for changes in the capsule’s elasticity with temperature
What happens to the capsule material when the temperature increases?
It becomes more flexible
What would be the effect of the temperature compensating ranging lever on the indicating element if the temperature increases?
It would over-read
What is the reference point for the instrument readout in the airspeed indicator?
Atmospheric pressure
What is the effect of an increase in ambient temperature on a bimetallic U bracket?
It does not affect the bracket's movement.
What is the purpose of the pitot tube in a pitot static system?
To measure the ram pressure of the airstream
Why are static ports located at right angles to the relative airflow?
To measure static pressure and not be affected by the speed of the aircraft
What is the common location of static ports on an aircraft?
Along the sides of the fuselage
What is the purpose of electric heaters in a pitot/static tube?
To prevent icing
What type of pitot probe will be covered later in the training materials?
A pitot probe with static ports and electric heaters
What is the primary purpose of the barometric adjustment knob on an altimeter?
To set the altimeter to read 0 feet at sea level
What is the unit of measurement displayed by the barometric pressure setting window on the altimeter dial?
Millibars and/or inches of mercury
Why is a sensitive altimeter critical for flight safety?
To maintain safe vertical separation between aircraft and terrain
What is the source of atmospheric pressure information relayed to pilots?
Air traffic control
What is the purpose of adjusting the altimeter to the local sea level pressure?
To set the altimeter to read 0 feet at sea level
What is the benefit of being able to set the pressure reading on an altimeter?
It forms an important part of flight operating techniques
What is a critical aspect of pitot static probe maintenance?
Maintaining the probe's alignment and condition
Why should probe covers be fitted during ground operations?
To protect the probe from bending and twisting, and to reduce the risk of injury and blockages
What was the cause of an airspeed indication failure during a rejected take-off in 2013?
A blocked pitot port due to a wasp nest
When does the aircraft's maintenance manual take precedence?
At all times, when specific information is provided
What is the purpose of the high visibility trailing warning flag on probe covers?
To provide a warning to personnel about the presence of the probe cover
What is the primary concern when handling the pitot static probe?
Avoiding bending or twisting the probe
This quiz covers the principles of temperature compensation in aeroplane systems, including the use of bimetallic U brackets and their response to changes in ambient temperature and pressure. Understand how these components work together to ensure stable system performance. Test your knowledge of aeroplane aerodynamics and systems.
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