Which statement is NOT an advantage of solid-state control?

• A. It has no moving parts.
• B. It switches quickly with minimal arcing.
• C. It requires frequent lubrication.
• D. It provides high reliability.

Answer: (C)

Solid-state control uses electronic switching devices with no moving parts, so wear and maintenance are greatly reduced. Because there are no mechanical contacts to wear, there’s no need for lubrication, which makes lubrication unnecessary rather than advantageous. The rapid switching of electronic devices occurs without the mechanical gaps that cause arcing, so arcing is minimized. Fewer moving parts also contribute to higher reliability, since there are fewer components that can fail or degrade over time.

So the statement that would not be an advantage is that lubrication is required; solid-state control does not require lubrication.