Aircraft Structures Quiz

'Fail safe construction' is:

• A simple and cheap type of construction.

• A type of construction in which the load is carried by other components if part of the structure fails.

• A type of construction for small aircraft only.

• A construction which is suitable for aerobatic flight.

"Nose wheel shimmy" may be described as:

• The amount of free movement of the nose wheel before steering takes effect.

• A possibly damaging sinusoidal movement of the nose wheel when moving on the ground.

• The oscillatory movement of the nose wheel when extended prior to landing.

• Aircraft vibration caused by the nose wheel upon extension of the gear.

A 'Q' pot can be referred to as a force gradient unit which is used to:

• Indicate the pitch angle on the stall warning indicator

• Prevent pilot inputs overriding auto-pilot inputs.

• Transmit Stability Augmentation System (SAS) movement back to the control sticks.

• Add artificial feel into a hydraulically powered flight control system.

A cantilever wing:

• Has both an upper and lower aerofoil section

• Folds at the root section to ease storage in confined spaces

• Is externally braced with either struts and/or bracing wires

• Is supported at one end only with no external bracing

A damage tolerant structure:

• Is a light non load bearing structure, damage to which will not adversely affect the aircraft

• Is replaced when it reaches its predicted life

• Need not be repaired until the aircraft undergoes deep maintenance

• Has a degree of structural strength redundancy spread over a large area

A torsion box:

• Is a structure formed between the wing spars, skin and ribs to resist bending and twisting loads

• Is a structure within the wing for housing the fuel tanks, flight controls and landing gear

• Is a structure designed to reduce the weight

• Is a structure within the fuselage to house the passengers

An aircraft has a tendency to fly right wing low with hands off. It is trimmed with a tab on the left aileron. The left trim tab will:

• Move down causing the left aileron to move up and right aileron to move down

• Move up causing the left aileron to move up and right aileron to move down

• Move up causing the left wing to move down ailerons remain neutral

• Move down causing the left aileron to move up right aileron remains neutral

An artificial feel system:

• Is necessary in a reversible flight control actuator unit.

• Functions in parallel to an irreversible servo-control unit.

• Functions in series to an irreversible servo-control unit.

• Is mounted in parallel on a spring tab.

An artificial feel unit is necessary in the pitch channel when:

• The elevators are fitted with servo-tabs or trim tabs.

• The elevators are actuated by irreversible servo-control units.

• The elevators are actuated by reversible servo-control units.

• There is a trimmable stabilizer.

An electrically heated windscreen is manufactured from:

• A boron aluminide and glass laminate.

• A glass and polycarbonate laminate.

• A perspex and polycarbonate laminate with gold heating element.

• Triple glass sheets with the grain laid at 60° to each other.