Flywheel Energy Quiz

What does a flywheel primarily store as energy?

• Thermal energy

• Chemical energy

• Kinetic energy

• Electrical energy

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How does the kinetic energy of a rotating flywheel depend on its angular velocity?

• It is proportional to the square of the angular velocity

• It decreases as angular velocity increases

• It remains constant regardless of angular velocity

• It is directly proportional to angular velocity

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Which of the following affects a flywheel's moment of inertia?

• Rotational speed

• Mass distribution

• Material friction

• Magnetic field strength

Why do faster-spinning flywheels store more energy?

• Higher angular velocity increases rotational energy exponentially

• Faster speeds reduce energy loss

• The faster it spins, the heavier it becomes

• Speed directly lowers friction

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What is a potential risk of spinning a flywheel too fast?

• Overheating

• Electrical short circuit

• Structural failure due to centrifugal forces

• Excessive energy loss through friction

What is the primary function of the dual-function motor in a flywheel?

• To regulate temperature

• To convert mechanical energy to electrical energy and vice versa

• To monitor rotational speed

• To charge batteries connected to the flywheel

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Why are magnetic bearings used in high-speed flywheels?

• To reduce energy loss from friction

• To increase rotational speed beyond limits

• To stabilize electrical output

• To increase the weight of the flywheel

What is the purpose of vacuum enclosures in advanced flywheels?

• To reduce heat buildup

• To eliminate aerodynamic drag

• To increase the moment of inertia

• To simplify maintenance requirements

What materials are commonly used to build modern high-speed flywheels?

• Steel and aluminum

• Carbon fiber and fiberglass

• Copper and tungsten

• Rubber and titanium

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How do flywheels minimize maintenance costs compared to traditional systems?

• By using air cooling instead of lubrication

• By employing magnetic bearings that don’t require lubrication

• By slowing down rotational speed during inactive periods

• By avoiding integration with electrical grids