PTEACS Physical Therapy Exam 1 Practice

In an externally powered wheelchair, which component provides propulsion?

Hand-crank only Solar panel and pedals Gasoline engine One or more deep-cycle batteries that provide stored electrical energy to drive or propel the wheelchair

Correct Answer:

One or more deep-cycle batteries that provide stored electrical energy to drive or propel the wheelchair

Explanation:

In an externally powered wheelchair, propulsion comes from the electric motors that drive the chair, and these motors run on energy stored in rechargeable batteries. One or more deep-cycle batteries are used because they are designed to supply a steady, higher current over longer periods, which matches the needs of continuous propulsion. The motors convert that electrical energy into the mechanical power that moves the wheelchair, with control typically handled by the user through a joystick or similar input. Other options don’t fit the standard setup: manual hand-crank propulsion relies on the user’s physical effort, solar panels or pedals aren’t the direct power source for propulsion, and a gasoline engine isn’t the typical drive system for most wheelchairs.

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