Aeroplane Aerodynamics, Structures and Systems: AoA System and Heater Element

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What is the primary function of an altitude switching unit?

To provide a warning signal when a preset altitude is reached (correct)

To actuate an electrical contact assembly for altimeter calibration

To measure the airframe load during flight

To record the aircraft's acceleration in the pitch axis

What is the major limiting factor in designing an altitude switching unit?

The material used to house the capsule

The load imposed on the capsule sensing element (correct)

The type of electrical contact assembly used

The size of the warning light or aural device

Where is an accelerometer typically mounted in an aircraft?

In the altimeter

In the cockpit

Near the aircraft's normal centre of gravity (correct)

On the instrument panel

What is the unit of calibration for an accelerometer?

G units Signup and view all the answers

What is the purpose of an accelerometer in non-aerobatic aircraft?

To record the loads placed on the airframe during its life Signup and view all the answers

What is the reading of an accelerometer when the aircraft is at rest?

1 g positive Signup and view all the answers

What is the main characteristic of a glass cockpit?

The use of electronic instrument displays Signup and view all the answers

What is the primary benefit of a glass cockpit?

Simplified aircraft operation and navigation Signup and view all the answers

What has replaced traditional gyroscopic flight instruments in modern aircraft?

Electronic Attitude and Heading Reference Systems (AHRS) and Air Data Computers (ADCs) Signup and view all the answers

What advantage do glass cockpits offer to aircraft manufacturers?

Increased customization options Signup and view all the answers

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 Signup and view all the answers

What is the key feature of flight management systems in glass cockpits?

They can be adjusted to display flight information as needed Signup and view all the answers

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 Signup and view all the answers

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 Signup and view all the answers

What happens to the stagnation point as the AoA increases?

It gradually moves down the leading edge of the wing Signup and view all the answers

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 Signup and view all the answers

What triggers the vane-type device in a stall warning system?

Upward moving air when the stagnation point moves below the vane Signup and view all the answers

What type of device is triggered by low pressure at the stagnation point?

Vibrating reed-type device Signup and view all the answers

What is the primary purpose of a bimetallic temperature indicator in an aircraft?

To indicate temperature Signup and view all the answers

What is the characteristic of invar metal used in bimetallic temperature indicators?

Low expansion coefficient Signup and view all the answers

What is the primary purpose of a 'g' meter in an aircraft?

To measure the force of gravity during turns Signup and view all the answers

Why are bimetallic temperature indicators typically not used on aircraft that fly above 150 knots?

Because they cause unnecessary drag due to their location Signup and view all the answers

What is the effect of a 5-g turn on the pilot and aircraft?

The force of gravity is increased by five times Signup and view all the answers

What is the principle behind the operation of a vapour-pressure type temperature indicator?

Change in state of a liquid with temperature Signup and view all the answers

How does a bimetallic temperature indicator respond to a change in temperature?

The spiral winds or unwinds, causing the pointer to move Signup and view all the answers

What is the significance of a negative 'g'?

The force of gravity is upward Signup and view all the answers

What is the purpose of the vented outer case in a bimetallic temperature indicator?

To protrude into the airflow and measure temperature Signup and view all the answers

What is the primary function of an aircraft clock?

To provide timing for navigation functions Signup and view all the answers

What is a characteristic of an aircraft clock certified for Instrument Flight Rules flight?

It must be serviceable Signup and view all the answers

What is an additional feature of an aircraft clock?

Internal lighting Signup and view all the answers