62 Questions
What is the purpose of varying lift force to control the vertical movement of an aircraft?
Controlling the vertical movement of the aircraft
What is used for active load control in an aircraft?
Aileron and spoiler
What is the purpose of the autopilot servo-motor torque setting?
To prevent control surface runaway
When are ground spoilers deployed automatically in a fully Fly By Wire Aircraft?
When thrust reversers are deployed
What nulls the rudder trim in a fully Fly By Wire aircraft?
Flight Augmentation Computers
Why is aileron input fed into the yaw damper system?
To prevent adverse yaw in a turn
What initiates pitch trimming in the autopilot?
Continued pitch input
What is the effect of differential aileron control?
Prevents yawing in conjunction with rudder input
What controls stabilizer trim in a fly-by-wire aircraft?
ELAC and SEC
When may the yaw damper be applied in an automatic flight control system?
During either manual or automatic control
What is the purpose of automatic angle of attack protection?
Autothrottle applying more power
What is the effect of a single failure in a fly-by-wire system?
Has no effect on the aircraft's operation
What is the result of the fly-by-wire load alleviation function in turbulent weather conditions?
Ailerons and spoiler moving symmetrically upward
When does the autotrim switch to 'slow' mode?
When the flaps are retracted
How is the stabilizer automatically controlled in normal manual operation?
Mach/Speed Trim
What device provides spoiler position feedback?
A Rotary Variable Differential Transformer (R.V.D.T.)
What is the purpose of rudder 'Q' limiting?
Restricts rudder movement with increase in airspeed
What functions do elevons combine?
Elevator and aileron
What is the purpose of a differential aileron system?
Prevent adverse yaw
When is an artificial feel system required?
For power operated control systems
What is the purpose of control cable regulators?
Maintain preset cable tensions during flight
What limits the range of movement of power-operated flying control surfaces?
Mechanical stops in the control system
Which control surface is used to control the aircraft about the lateral axis?
Elevator
Which control surface is used to control the aircraft about the normal axis?
Rudder
What is the purpose of the servo valve in a power-operated control system?
To direct hydraulic fluid to the jack in response to the pilot's control in the cockpit
What is the function of a stick shaker?
Vibrates the control column near stalling speed
Which control surface is used to control the aircraft about the longitudinal axis?
Ailerons
How do ruddervators move when actuated?
Either opposite each other or together, depending on the selection
What is the effect on stick forces when the center of gravity is close to the aft limit?
The stick forces when pitching the nose down will be very high
How is an anti-balance tab operated?
Via a fixed linkage
What movement does a wing mounted stall warning vane make at impending stall?
Moves down
What moves during an autopilot controlled turn?
Ailerons, rudder, and elevators
In a full fly-by-wire system, what controls the speedbrake screwjack servomotor?
Flight control computer
Who controls the roll spoilers in a fly-by-wire aircraft?
Flight control computer
What is the purpose of mass balance weights on aircraft control surfaces?
Balance the trailing edge of flying control surfaces
What is involved in active load control on aircraft?
Limiting the deflection of control surface with airspeed
What assists the pilot to move a flying control by moving automatically in the opposite direction to the control surface?
Geared balance tab
Which type of flap extends rearwards when lowered?
Fowler flap
What is used to reduce the aircraft's speed rapidly during severe turbulence or when speed tends to exceed limits?
Air brakes
Which control is not classified as a primary flying control?
Tailplane
What combines with spoilers when used asymmetrically?
Ailerons
What is used to correct undesirable flight attitudes in the aircraft?
Trim tabs
Which trailing edge flaps provide an increase in wing area?
Fowler flap
What type of actuator transmits pilot input to the control surfaces?
Powered flying control actuator
When do stick shakers operate?
Just before the stall
Which system provides irreversibility of a fully powered control surface?
Nulling of the servo valve
What is the effect of extending the right spoiler while keeping the left spoiler retracted?
The aircraft rolls to the right
If the aileron trim control is moved to counteract a tendency to fly left wing low, what will happen to the ailerons?
The left aileron will move down, and the right aileron will move down to a lesser degree
If the elevator trim tab is adjusted to correct for a nose-heavy condition, what will be the direction of travel of the trim tab?
The trim tab will move down
What type of material are pulleys in a flight control system typically made from?
Tufnol or aluminum alloy
What is the primary purpose of a tension regulator in the flight control cable system of a large all-metal aircraft?
To retain a set tension in the cables
What is the purpose of an interrupter arm incorporated in a flying control locking mechanism?
To restrict movement of the throttles
What is the purpose of a differential aileron control system?
Aileron drag being reduced on the outer wing in a turn
How are spoiler panels controlled?
The aileron control wheel and speed brake lever
Where is a lift transducer normally fitted on an aircraft?
On the leading edge of the wing
What happens to spoiler panels in a fly-by-wire system if electrical power is removed?
Go to down if any are not already down
In a fly-by-wire control system, where is the follow-up transducer fitted?
The hydraulic actuator
Why is the down position of the speed brake lever detented?
Prevent inadvertent operation
To prevent rolling, asymmetric flap operation is designed to keep to a minimum the tendency of what?
Rolling
When is high thrust stall warning activated in an aircraft?
Greater than 75% thrust of opposite engine
What does a differential aileron control provide in terms of aileron travel?
A larger aileron up travel than down
What occurs when the control column is moved back and the hand-wheel turned to the left?
The left aileron moves up and the elevators move up
Test your knowledge on aircraft systems with questions about stall warning vanes and autopilot controlled turns. Find out if you can identify the correct responses and explanations provided.
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