SIFT Aircraft Components and Controls Questions and Answers 2

Question 1

What is the primary purpose of the collective pitch control in a helicopter?

Accepted Answer

To simultaneously change the pitch angle of all main rotor blades

Answer

The collective pitch control raises or lowers the pitch angle of all main rotor blades simultaneously, changing the total lift generated and controlling altitude.

Question 2

What does the term 'semi-monocoque' refer to in aircraft construction?

Accepted Answer

A fuselage structure where the skin shares stress loads with internal framework

Answer

Semi-monocoque construction uses a combination of an outer skin and internal structural members (frames, bulkheads, stringers) that share the stress loads.

Question 3

What is the function of the anti-torque pedals in a helicopter?

Accepted Answer

Control the pitch of the tail rotor blades to counteract torque

Answer

Anti-torque pedals control the pitch angle of the tail rotor blades, which adjusts the thrust that counteracts main rotor torque and controls yaw direction.

Question 4

What component in a helicopter transmission system allows the rotor to continue spinning when the engine fails?

Accepted Answer

The freewheeling unit (one-way clutch)

Answer

The freewheeling unit, or one-way clutch, disengages the engine from the rotor when engine RPM drops below rotor RPM, allowing autorotation.

Question 5

What is the purpose of the horizontal stabilizer on a helicopter?

Accepted Answer

To provide aerodynamic stability and reduce pitch oscillations

Answer

The horizontal stabilizer provides aerodynamic stability by countering the tendency of the nose to pitch up or down, reducing oscillations in forward flight.

SIFT Exam Practice Test

SIFT Exam Practice Test

SIFT Aircraft Components and Controls Questions and Answers 2