Quiz 1

Question 1

What axis extends lengthwise through the fuselage from the nose to the tail of an aircraft?

Answer 1

Longitudinal Axis

Question 2

Air density is directly proportional to pressure and inversely proportional to temperature.

Answer 2

True

Question 3

What principle explains the creation of lift due to the difference in air velocity over and under the wing?

Answer 3

Bernoulli’s Principle

Question 4

The angle of incidence is the angle between the chord line of the wing and the direction of the relative wind.

Answer 4

False

Question 5

Parasite drag can be Completely eliminated by streamlining the shape of the aircraft.

Answer 5

False

Question 6

What is the angle between the chord line of the wing and the longitudinal axis of the aircraft called?

Answer 6

Angle of Incidence

Question 7

What is the primary composition of the air in Earth’s Atmosphere?

Answer 7

Nitrogen and Oxygen

Question 8

What is the primary purpose of trim tabs on an aircraft?

Answer 8

To correct any tendency of the aircraft to move toward an undesirable flight attitude

Question 9

The aspect ratio is the comparison of the wingspan to the chord length, and a higher aspect ratio results in greater lift.

Answer 9

True

Question 10

What is Velocity?

Answer 10

The rate of motion in a particular direction in relation to time.

Question 11

Which force counteracts the effect of weight and acts vertically?

Answer 11

Lift

Question 12

What force is responsible for moving an aircraft forward?

Answer 12

Thrust

Question 13

Which of the following can increase lift on an aircraft wing?

Answer 13

Increasing the air velocity over the wing

Question 14

Dynamic stability deals with the tendency of a displaced body to return to equilibrium.

Answer 14

False

Question 15

What type of stability exist when a disturbed object tends to return to equilibrium?

Answer 15

Positive static stability

Question 16

What is the law of conservation of energy?

Answer 16

Energy can neither be created nor destroyed

Question 17

Which control surface is responsible for controlling the yaw of an aircraft?

Answer 17

Rudder

Question 18

Which of the following auxiliary lift devices is primarily used to increase lift during takeoff and improve handling characteristics at low airspeeds?

Answer 18

Slats

Question 19

Servo tabs are designed to move in the opposite direction of the primary flight control surface.

Answer 19

False

Question 20

What surface is primarily responsible for controlling longitudinal stability in an aircraft?

Answer 20

Horizontal Stabilizer

Question 21

Which control surface is responsible for controlling the pitch of an aircraft?

Answer 21

Elevators

Question 22

The CG ( Center Of Gravity) of an aircraft is the point where all the weight of the aircraft is concentrated.

Answer 22

True

Question 23

Bernoulli’s Principle states that as the speed of a fluid increases, its pressure also increases.

Answer 23

False

Question 24

At sea level, what is the standard atmospheric pressure measured in pounds per square inch (psi)?

Answer 24

14.7 psi

Question 25

What is the primary purpose of winglets on an aircraft?

Answer 25

To reduce aerodynamic drag associated with vortices at the wingtips.

Question 26

Spoilers are used to increase lift and improve handling characteristics at low airspeeds.

Answer 26

False

Question 27

How do single-main rotor helicopters counteract torque?

Answer 27

Tail rotor and foot pedals

Question 28

What is the effect of increasing the helicopter’s speed on the rotor blades’ movement and the rotor disc’s position?

Answer 28

Blades flap and cause the rotor disc to tilt backwards.

Question 29

What is the purpose of a freewheeling unit in a helicopter?

Answer 29

Allow the rotor to spin freely if the engine fails

Question 30

What is the effect of gyroscopic precession on a helicopter’s main rotor?

Answer 30

Rotor disc tilts forward

Question 31

What happens to lift when the angle of attack (AOA) of the rotor blades is increased during vertical flight?

Answer 31

Helicopter Ascends

Question 32

During hovering flight, in which direction does a single main rotor helicopter tend to drift due to the tail rotor thrust?

Answer 32

In the direction of tail rotor thrust

Question 33

How does a dual-rotor helicopter balance aerodynamic torque?

Answer 33

Two horizontal counter-rotating rotors.

Question 34

What distinguishes a fully articulated rotor system from other rotor systems?

Answer 34

Each blade moves in three directions, pitch, lead-lag, and flap

Question 35

Which force acts upward and adjusts with rotor tilt in a helicopter?

Answer 35

Lift

Question 36

What is the primary purpose of rigging in helicopter assembly and maintenance?

Answer 36

Ensure the coordination and precise movement of flight controls

Question 37

What happens when the collective pitch control is raised?

Answer 37

Pitch angle of all main rotor blades increases

Question 38

What is the primary function of a stabilizer bar in a helicopter’s Bell Stabilizer Bar System?

Answer 38

Improve helicopter stability

Question 39

How does an offset flapping hinge enhance helicopter control?

Answer 39

Creating powerful moments for control with greater offset

Question 40

What is the primary method used for rotor blade tracking?

Answer 40

Using a stroboscopic light to measure blade positions

Question 41

What is the purpose of the freewheeling unit in a helicopter?

Answer 41

Disconnect the main rotor from the engine when rotor RPM exceeds engine RPM

Question 42

What is the primary function of the helicopter transmission system?

Answer 42

Transfer power from the engine to the rotors and other accessories

Question 43

What is the purpose of Stability Augmentation Systems (SAS) in helicopters?

Answer 43

Stabilize helicopters and reduce pilot workload

Question 44

How do anti torque pedals help control a helicopter?

Answer 44

Controlling the pitch and thrust of the tail rotor blades.

Question 45

Which type of engine is commonly used in training helicopters due to its simplicity and cost-effectiveness?

Answer 45

Reciprocating Engine

Question 46

What is the primary function of the awash plate assembly in a helicopter?

Answer 46

Transmit pilot controls to the main rotor blades