Which statement regarding the constant-speed propeller is correct?

Question

Question PPL(A) - Private Pilot License - Principle of Flight

QuizVDS · Accepted Answer

The pitch of the propeller rises with higher speeds

QuizVDS · Answer

The propeller keeps the airspeed constant

QuizVDS · Answer

The RPM decreases with lower speeds

QuizVDS · Answer

The set RPM is kept constant by the motor power (MAP)

Id 91 - PPL(A) EN - Which statement regarding the "constant-speed propeller" is correct?