30 Questions
What is the primary function of an altitude switching unit?
To provide a warning signal when a preset altitude is reached
What is the major limiting factor in designing an altitude switching unit?
The load imposed on the capsule sensing element
Where is an accelerometer typically mounted in an aircraft?
Near the aircraft's normal centre of gravity
What is the unit of calibration for an accelerometer?
G units
What is the purpose of an accelerometer in non-aerobatic aircraft?
To record the loads placed on the airframe during its life
What is the reading of an accelerometer when the aircraft is at rest?
1 g positive
What is the main characteristic of a glass cockpit?
The use of electronic instrument displays
What is the primary benefit of a glass cockpit?
Simplified aircraft operation and navigation
What has replaced traditional gyroscopic flight instruments in modern aircraft?
Electronic Attitude and Heading Reference Systems (AHRS) and Air Data Computers (ADCs)
What advantage do glass cockpits offer to aircraft manufacturers?
Increased customization options
What is the primary goal of the modifications offered by aircraft manufacturers in glass cockpits?
To improve situational awareness and customize the human-machine interface
What is the key feature of flight management systems in glass cockpits?
They can be adjusted to display flight information as needed
What is the purpose of reducing the heater element's power when the wheels are on the ground?
To prevent overheating and burning out of the element
What is the primary function of the stall warning system in an aircraft?
To provide a clear warning when the angle of attack sensor detects a critical angle of attack
What happens to the stagnation point as the AoA increases?
It gradually moves down the leading edge of the wing
What is the purpose of ensuring datum points, lines, and direction arrows are observed during AoA probe installation?
To guarantee the probe's correct alignment and location
What triggers the vane-type device in a stall warning system?
Upward moving air when the stagnation point moves below the vane
What type of device is triggered by low pressure at the stagnation point?
Vibrating reed-type device
What is the primary purpose of a bimetallic temperature indicator in an aircraft?
To indicate temperature
What is the characteristic of invar metal used in bimetallic temperature indicators?
Low expansion coefficient
What is the primary purpose of a 'g' meter in an aircraft?
To measure the force of gravity during turns
Why are bimetallic temperature indicators typically not used on aircraft that fly above 150 knots?
Because they cause unnecessary drag due to their location
What is the effect of a 5-g turn on the pilot and aircraft?
The force of gravity is increased by five times
What is the principle behind the operation of a vapour-pressure type temperature indicator?
Change in state of a liquid with temperature
How does a bimetallic temperature indicator respond to a change in temperature?
The spiral winds or unwinds, causing the pointer to move
What is the significance of a negative 'g'?
The force of gravity is upward
What is the purpose of the vented outer case in a bimetallic temperature indicator?
To protrude into the airflow and measure temperature
What is the primary function of an aircraft clock?
To provide timing for navigation functions
What is a characteristic of an aircraft clock certified for Instrument Flight Rules flight?
It must be serviceable
What is an additional feature of an aircraft clock?
Internal lighting
Learn about the AoA system and its role in preventing overheating and burning out of the heater element in aircraft. Understand the importance of handling probe-type sensors with care and the removal of excess heat during flight.
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