PRINCIPLES OF FLIGHT-U5

A Longerons is a

• lateral line on an aircraft wing.
• vertical line on aircraft fuselage.
• longitudinal line on the aircraft fuselage.

The main forces on an aircraft structure are

• tension, compression, torsion, and shear.
• tension, compression, torsion and strain.
• tension, compression, twisting, and shear.

A member taking a compression load is called a

• Strut

• cable.
• fairing.

Which of the following is primary structure for fuselage?

• Frame.
• Rib
• Stringer.

Which parts of the aircraft are classified secondary structures?

• These parts of the airframe are highly stressed but if damaged will not cause failure of the aircraft.
• These parts of the airframe are highly stressed and if damaged may cause failure of the aircraft and loss of life.
• These are lightly stressed parts such as fairings, wheel shields and minor component brackets et

One purpose of a rib is to

• support the bending loads on a fuselage.
• form the main lateral member in an aerofoil.
• maintain the correct contour of aerofoils covering.

The four main structural items making up a horizontal stabilizer are

• spar, rib, bulkheads, skin panels.
• spar, rib, stringers, skin panels.
• spar, rib, longerons, skin panels.

Which statement below that can best relate to the advanced composite material?

• Low strength to weight ratio
• High strength to weight ratio
• High stiffness to strength ratio

The main function of aircraft’s bulkhead is to

• maintains the pressure required for aircraft cabin.
• stabilize the airplane movement during flight.
• improve fuselage bending strength during flight.

Tension is the stress of

• crush or compression.
• elongation or stretch.
• twisting or bending.