Power System Instrumentation
1. Which law explains the lift generation on an aircraft wing?
a) Newton’s First Law
b) Newton’s Second Law
c) Bernoulli’s Principle
d) Hooke’s Law
Answer: c) Bernoulli’s Principle
2. What is the primary function of the horizontal stabilizer?
a) Provide lift
b) Control yaw
c) Control pitch
d) Reduce drag
Answer: c) Control pitch
3. What is the angle between the chord line of an airfoil and the direction of the relative wind called?
a) Angle of incidence
b) Angle of attack
c) Dihedral angle
d) Sweep angle
Answer: b) Angle of attack
4. The Mach number is defined as the ratio of an object’s speed to the speed of what?
a) Sound
b) Light
c) Water
d) Wind
Answer: a) Sound
5. Which part of an aircraft generates the most lift?
a) Fuselage
b) Tail
c) Wings
d) Engines
Answer: c) Wings
6. What does the term “stall” refer to in aviation?
a) Engine failure
b) Loss of lift
c) Over-speeding
d) Structural failure
Answer: b) Loss of lift
7. What is the purpose of winglets on an aircraft?
a) Increase lift
b) Reduce drag
c) Improve stability
d) Decrease weight
Answer: b) Reduce drag
8. In which layer of the atmosphere do commercial jets typically cruise?
a) Troposphere
b) Stratosphere
c) Mesosphere
d) Thermosphere
Answer: b) Stratosphere
9. What is the name of the point at which the airflow separates from the surface of an airfoil?
a) Separation point
b) Boundary layer
c) Stagnation point
d) Laminar flow
Answer: a) Separation point
10. Which control surface is primarily responsible for controlling the roll of an aircraft?
a) Elevator
b) Aileron
c) Rudder
d) Flaps
Answer: b) Aileron
11. What is the primary function of the rudder on an aircraft?
a) Control roll
b) Control pitch
c) Control yaw
d) Provide lift
Answer: c) Control yaw
12. What is the term for the upward force that counteracts an aircraft’s weight?
a) Thrust
b) Drag
c) Lift
d) Gravity
Answer: c) Lift
13. Which type of drag is caused by the friction of air flowing over the surface of an aircraft?
a) Induced drag
b) Parasite drag
c) Wave drag
d) Profile drag
Answer: b) Parasite drag
14. What is the main purpose of an aircraft’s flaps?
a) Increase lift during takeoff and landing
b) Control yaw
c) Reduce drag during cruise
d) Increase speed
Answer: a) Increase lift during takeoff and landing
15. The term “supersonic” refers to speeds greater than which multiple of the speed of sound?
a) 0.5
b) 1
c) 1.5
d) 2
Answer: b) 1
16. Which type of engine is most commonly used in commercial jet aircraft?
a) Piston engine
b) Turboprop engine
c) Turbofan engine
d) Ramjet engine
Answer: c) Turbofan engine
17. What is the purpose of an aircraft’s ailerons?
a) Control pitch
b) Control roll
c) Control yaw
d) Increase lift
Answer: b) Control roll
18. Which term describes the force that resists the motion of an aircraft through the air?
a) Thrust
b) Lift
c) Drag
d) Weight
Answer: c) Drag
19. What is the name of the path an aircraft follows over the ground?
a) Flight path
b) Glide path
c) Airway
d) Track
Answer: d) Track
20. What phenomenon occurs when an aircraft exceeds the speed of sound?
a) Shock wave formation
b) Turbulence
c) Vortex generation
d) Laminar flow
Answer: a) Shock wave formation
21. Which component of the aircraft provides stability and control during flight?
a) Winglets
b) Fuselage
c) Empennage
d) Engine
Answer: c) Empennage
22. What is the primary function of the aircraft’s fuselage?
a) Generate lift
b) Provide thrust
c) House crew, passengers, and cargo
d) Control yaw
Answer: c) House crew, passengers, and cargo
23. Which instrument indicates an aircraft’s speed relative to the surrounding air?
a) Altimeter
b) Airspeed indicator
c) Vertical speed indicator
d) Heading indicator
Answer: b) Airspeed indicator
24. What is the effect of deploying spoilers on an aircraft wing?
a) Increase lift
b) Decrease drag
c) Reduce lift
d) Increase speed
Answer: c) Reduce lift
25. Which part of the aircraft reduces the tendency to yaw?
a) Vertical stabilizer
b) Horizontal stabilizer
c) Winglets
d) Ailerons
Answer: a) Vertical stabilizer
26. What is the critical angle of attack?
a) The angle at which lift is maximized
b) The angle at which drag is minimized
c) The angle at which an aircraft will stall
d) The angle at which thrust is maximized
Answer: c) The angle at which an aircraft will stall
27. Which type of aircraft structure is characterized by a stressed skin design?
a) Truss
b) Monocoque
c) Semi-monocoque
d) Composite
Answer: c) Semi-monocoque
28. What is the main advantage of a swept wing design?
a) Increased lift
b) Reduced drag at high speeds
c) Improved low-speed performance
d) Enhanced stability
Answer: b) Reduced drag at high speeds
29. What does the term “aerodynamic center” refer to?
a) The point where lift is concentrated
b) The point where all aerodynamic forces act
c) The point where drag is minimized
d) The point where stability is maximized
Answer: b) The point where all aerodynamic forces act
30. Which flight control surface is used to change an aircraft’s pitch attitude?
a) Ailerons
b) Elevators
c) Rudder
d) Flaps
Answer: b) Elevators
31. What is the primary purpose of vortex generators on an aircraft wing?
a) Increase lift
b) Reduce drag
c) Delay flow separation
d) Improve control
Answer: c) Delay flow separation
32. Which type of wing planform has a constant chord along its entire span?
a) Tapered wing
b) Elliptical wing
c) Rectangular wing
d) Delta wing
Answer: c) Rectangular wing
33. What is the primary function of the landing gear?
a) Provide lift during takeoff
b) Absorb landing impacts
c) Control aircraft direction
d) Increase speed
Answer: b) Absorb landing impacts
34. Which of the following is a primary flight control surface?
a) Flaps
b) Slats
c) Spoilers
d) Rudder
Answer: d) Rudder
35. What is the term for the distance between the leading edge and the trailing edge of a wing?
a) Span
b) Chord
c) Camber
d) Dihedral
Answer: b) Chord
36. What is the primary effect of increasing the camber of an airfoil?
a) Increase lift
b) Decrease lift
c) Increase drag
d) Decrease drag
Answer: a) Increase lift
37. Which component of the aircraft is primarily responsible for controlling pitch and yaw during takeoff?
a) Rudder
b) Elevators
c) Ailerons
d) Flaps
Answer: b) Elevators
38. What is the purpose of dihedral angle in wing design?
a) Increase lift
b) Improve roll stability
c) Reduce drag
d) Increase speed
Answer: b) Improve roll stability
39. Which type of propulsion system is commonly used in modern commercial airliners?
a) Turbojet
b) Turbofan
c) Turboprop
d) Ramjet
Answer: b) Turbofan
40. What is the function of the nacelle on an aircraft engine?
a) Reduce drag
b) Increase thrust
c) Protect the engine
d) Improve stability
Answer: c) Protect the engine
41. What is the main purpose of a flight data recorder?
a) Record cockpit conversations
b) Monitor engine performance
c) Record flight parameters
d) Track aircraft location
Answer: c) Record flight parameters
42. Which term describes the lift generated by a wing in the presence of downwash?
a) Induced lift
b) Parasite lift
c) Profile lift
d) Differential lift
Answer: a) Induced lift
43. What is the primary function of the pitot tube on an aircraft?
a) Measure airspeed
b) Measure altitude
c) Measure temperature
d) Measure pressure
Answer: a) Measure airspeed
44. Which flight control surface is used to change an aircraft’s yaw attitude?
a) Elevators
b) Ailerons
c) Rudder
d) Flaps
Answer: c) Rudder
45. What is the term for the imaginary line from the leading edge to the trailing edge of an airfoil?
a) Camber line
b) Mean aerodynamic chord
c) Chord line
d) Lift line
Answer: c) Chord line
46. Which type of wing configuration is characterized by wings extending from the fuselage at an upward angle?
a) Dihedral
b) Anhedral
c) Cantilever
d) Gull wing
Answer: a) Dihedral
47. What is the function of the static port on an aircraft?
a) Measure static pressure
b) Measure dynamic pressure
c) Measure temperature
d) Measure altitude
Answer: a) Measure static pressure
48. What is the term for the upward bending of the wings of an aircraft?
a) Dihedral
b) Anhedral
c) Wing flex
d) Washout
Answer: a) Dihedral
49. What is the main purpose of the ailerons during flight?
a) Increase lift
b) Decrease drag
c) Control roll
d) Control pitch
Answer: c) Control roll
50. Which component of an aircraft helps to reduce the tendency of the aircraft to yaw left or right?
a) Rudder
b) Ailerons
c) Vertical stabilizer
d) Elevators
Answer: c) Vertical stabilizer