1. Which of the following is not a part of the airframe?
a) Fuselage
b) Wing
c) Stabilizing tail
d) Landing gear
Explanation: The main parts of the airframe are the fuselage, wing, stabilizing tail and undercarriage. The landing gear is not a part of the airframe.
2. Which was the first commercial aircraft with 50% of its structure weight made of carbon-fiber composite?
a) Boeing 777
b) Boeing 787
c) Boeing 747
d) Airbus A380
Explanation: The Boeing 787 was the first commercial aircraft with 50% of its structure weight made of carbon-fiber composites, along 20% Aluminum and 15% titanium. It first flew in 2009.
3. What material is used for aircraft fuselage?
a) Aluminum alloys
b) Titanium alloys
c) Silver alloys
d) Metal alloys
Explanation: The aircraft fuselage is made of aluminum alloys along with other materials such as Zn, Mg and Cu. However modern aircrafts have started using carbon fiber materials in order to decrease the aircraft weight and in turn increase performance.
4. Wings are responsible for creating lift.
a) true
b) false
Explanation: The wings of an aircraft are responsible for producing lift. Many different styles and arrangements of wings have been used on heavier than air aircrafts. Some lighter than air aircraft also have wings.
5. Landing gears are also known as __________
a) Stabilizers
b) Empennage
c) Undercarriage
d) Aileron
Explanation: The landing gears are also known as undercarriage. It is the structure that supports an aircraft when it is not flying and allows it to take off, land and taxi.
6. Which of the following is not true about an airframe made with carbon-fiber composite?
a) Decreases drag
b) Decreases thrust
c) Higher cabin pressurization
d) Higher wing aspect ratio
Explanation: Carbon-fiber material allows for a lower-drag along with higher wing aspect ratio and higher cabin pressurization. However, these materials have no effect on thrust.
7. Which of the following supports an aircraft on the ground?
a) Rudder
b) Engines
c) Aileron
d) Landing gear
Explanation: Landing gear is the structure that supports an aircraft when it is not flying and allows it to manoeuvre on the ground. Most commonly, wheels are used but other equipment such as floats and skids can also be used, depending on the surface
8. The fuselage of an aircraft contains the engines.
a) true
b) false
Explanation: The fuselage is an aircraft’s main body section containing the cockpit or flight deck along with the passenger cabin and cargo hold. It also often contains the engine(s).
9. Which was the first widely produced general aviation aircraft manufactured with all composite construction?
a) Boeing 787
b) Airbus A350
c) Cirrus SR20
d) Bombardier CRJ700
Explanation: The first widely produced aviation aircraft with all composite construction was Cirrus SR20. It first flew in 1995 and has a cruise speed of 287km/h.
10. What do winglets do?
a) Increase thrust
b) Reduce turbulence at the tips of an airplane’s wings
c) Decrease thrust
d) Increase turbulence at the tips of an airplane’s wings
Explanation: The purpose of winglets is to reduce turbulence at the tips of an airplane’s wings. Winglets and sharklets are similar to each other. The wingtip vortices created by a large aircraft are strong enough to flip a smaller aircraft that maybe flying closely. Winglets are responsible to break these vortices thereby reducing drag on the airplane