Helicopter Vibration Quiz

What is the definition of vibration?

• A motion characterized by repeated oscillations about an average position

• A motion characterized by linear movement

• A motion characterized by random jumps

• A motion characterized by constant speed

What are the causes of helicopter vibrations?

• Passenger discomfort and crew fatigue

• Proper maintenance

• Unbalanced components and aerodynamic forces

• Correct blade(s) alignment and tracking

How are helicopter vibrations classified?

• Primary, secondary, and tertiary vibrations

• Slow, moderate, and fast vibrations

• Low frequency, medium frequency, and high frequency

• Simple, complicated, and steady vibrations

Why is it important to control helicopter vibrations?

• To improve crew efficiency, safety, and component longevity

• To increase noise levels and improve aerodynamics

• To enhance passenger comfort and increase maintenance costs

• To increase fuel consumption and increase speed

Long exposure to high vibration can contribute to wear of mechanical, electronic, and airframe components

• True

• False

• Not Sure

What are the effects of high frequency vibrations on helicopters?

• Reduced aircraft performance, passenger fatigue, and premature failure of structural components

• safer and increase aircraft efficiency

• Improved crew efficiency, reduced maintenance costs, and minimized noise levels

• Component longevity, sensor and equipment performance, and improved aerodynamics

What is the main impact of excessive vibrations on helicopters?

• Enhanced stability and handling

• Degraded performance of equipment

• Increased comfort for passengers

• Improved fuel efficiency

Which type of vibration is mainly associated with the main rotor of a helicopter?

• Low-frequency vibrations

• Medium-frequency vibrations

• High-frequency vibrations

• Passive vibrations

Balanced components and aerodynamic forces are the two main causes of helicopter vibrations.

• True

• False

• Not Sure

What is the range of medium frequency vibrations?

• 0 to 500 CPM

• 2000 CPM and Above

• 300 - 500 CPM

• 500 - 2000CPM