NCAA CPL (H) Theory Practice Questions - NCAA Commercial Pilot Licence (Helicopter) Theory Exam (Nigeria) Exam - NCAA CPL (H) Theory Practice Questions - NCAA Commercial Pilot Licence (Helicopter) Theory Exam (Nigeria) Exam

Question 1

What is the primary cause of dissymmetry of lift in forward helicopter flight?

Unequal air density between advancing and retreating sides of the rotor disc The differential relative wind speed acting on the advancing blade compared to the retreating blade Variations in engine torque delivered to the main rotor mast during forward acceleration Differences in blade chord line profile along the span of the main rotor blade

Correct Answer:

The differential relative wind speed acting on the advancing blade compared to the retreating blade

Question 2

How does a helicopter rotor system automatically compensate for dissymmetry of lift in forward flight?

By blade flapping, where the advancing blade flaps up decreasing its angle of attack and the retreating blade flaps down increasing its angle of attack By manual pilot cyclic inputs applied constantly to balance blade lift forces By engine governor adjustments that increase main rotor RPM on the advancing side By automatic pitch change links that lock the advancing blade pitch to zero degrees

Correct Answer:

By blade flapping, where the advancing blade flaps up decreasing its angle of attack and the retreating blade flaps down increasing its angle of attack

Question 3

Which mechanical component disengages the main rotor from the engine during an engine failure to allow autorotation?

The swashplate assembly The freewheeling unit (sprag clutch) The rotor brake caliper The main transmission planetary governor

Correct Answer:

The freewheeling unit (sprag clutch)

Question 4

Why does a helicopter require less power to hover In Ground Effect (HIGE) than Out of Ground Effect (HOGE)?

Because ground effect increases main rotor RPM automatically Because the proximity of the ground reduces induced flow velocity and tip vortex strength, increasing rotor efficiency Because engine air intake pressure is doubled by ground reflection Because ground effect eliminates tail rotor anti-torque power requirements

Correct Answer:

Because the proximity of the ground reduces induced flow velocity and tip vortex strength, increasing rotor efficiency

Question 5

What aerodynamic condition imposes the absolute forward speed limit (Vne) on a helicopter due to retreating blade stall?

High forward speed causing the retreating blade to exceed its critical angle of attack as relative wind decreases High forward speed causing supersonic shockwaves on the advancing blade tip exclusively Low rotor RPM causing the advancing blade to stall near the root hub Tail rotor overspeed caused by high forward airflow velocity

Correct Answer:

High forward speed causing the retreating blade to exceed its critical angle of attack as relative wind decreases

Exam overview

About this Exam

Prepare with the NCAA CPL (H) Theory Practice Questions - NCAA Commercial Pilot Licence (Helicopter) Theory Exam (Nigeria) Exam practice quiz. This question bank includes 100 questions covering helicopter, rotor, flight, main, and engine. Use it to review important concepts, identify knowledge gaps, and build confidence for the related exam, course, or assessment.

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NCAA CPL (H) Theory Practice Questions - NCAA Commercial Pilot Licence (Helicopter) Theory Exam (Nigeria) Exam

This practice set contains 100 questions from the matching question bank and focuses on helicopter, rotor, flight, main, and engine. Work through each question carefully, review the provided solutions, and revisit topics that need more study before your next attempt.

This is an independent study resource intended for practice and review; it is not an official examination or an endorsement by any organization named in the title.

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NCAA CPL (H) Theory Practice Questions - NCAA Commercial Pilot Licence (Helicopter) Theory Exam (Nigeria) Exam

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