Day 1 Progress Check Flashcards
Which of the following auxiliary lift devices is primarily used to increase lift during takeoff and improve handling characteristics at low airspeeds?
Slats
Dynamic stability deals with the tendency of a displaced body to return to equilibrium.
F
What is the law of conservation of energy?
Energy can neither be created nor destroyed.
Spoilers are used to increase lift and improve handling characteristics at low airspeeds.
F
What force is responsible for moving an aircraft forward?
Thrust
Parasite drag can be completely eliminated by streamlining the shape of the aircraft.
F
Which control surface is responsible for controlling the pitch of an aircraft?
Elevators
At sea level, what is the standard atmospheric pressure measured in pounds per square inch (psi)?
14.7 psi
What axis extends lengthwise through the fuselage from the nose to the tail of an aircraft?
Longitudinal axis
The CG (Center of Gravity) of an aircraft is the point where all the weight of the aircraft is concentrated.
T
What is the primary composition of the air in Earth’s atmosphere?
Nitrogen and oxygen
Servo tabs are designed to move in the opposite direction of the primary flight control surface.
F
What is the primary purpose of trim tabs on an aircraft?
To correct any tendency of the aircraft to move toward an undesirable flight attitude
Which of the following can increase lift on an aircraft wing?
Increasing the air velocity over the wing
What is velocity?
The rate of motion in a particular direction in relation to time.
Which control surface is responsible for controlling the yaw of an aircraft?
Rudder
What is the primary purpose of winglets on an aircraft?
To reduce aerodynamic drag associated with vortices at the wingtips
Air density is directly proportional to pressure and inversely proportional to temperature.
T
The angle of incidence is the angle between the chord line of the wing and the direction of the relative wind.
F
What is the angle between the chord line of the wing and the longitudinal axis of the aircraft called?
Angle of Incidence
Which force counteracts the effects of weight and acts vertically?
Lift
Bernoulli’s principle states that as the speed of a fluid increases, its pressure also increases.
F
What principle explains the creation of lift due to the difference in air velocity over and under the wing?
Bernoulli’s Principle
What type of stability exists when a disturbed object tends to return to equilibrium?
Positive static stability
The aspect ratio is the comparison of the wingspan to the chord length, and a higher aspect ratio results in greater lift.
T
What surface is primarily responsible for controlling longitudinal stability in an aircraft?
Horizontal stabilizer
