Which statement about stand-alone units is true?

Which statement about stand-alone units is true?

• A. They are integrated into the chair system.
• B. They have their own pedal separate from the dental unit rheostat.
• C. They require a separate power supply for each tool.
• D. They are battery-powered and portable.

Answer: (B)

Stand-alone units operate independently from the chair’s built-in controls, which means they have their own foot pedal separate from the dental unit rheostat. This arrangement lets you control that specific instrument’s speed or power directly, without relying on the chair’s control system. It supports flexible setup and use with multiple operators or configurations, since the pedal and control are dedicated to the independent unit. The other statements don’t fit because a stand-alone unit isn’t defined by being integrated into the chair, nor by requiring a separate power source for each tool, and most are not limited to battery power and portability.

Stand-alone units operate independently from the chair’s built-in controls, which means they have their own foot pedal separate from the dental unit rheostat. This arrangement lets you control that specific instrument’s speed or power directly, without relying on the chair’s control system. It supports flexible setup and use with multiple operators or configurations, since the pedal and control are dedicated to the independent unit.

The other statements don’t fit because a stand-alone unit isn’t defined by being integrated into the chair, nor by requiring a separate power source for each tool, and most are not limited to battery power and portability.