Closed transition starting means:

• A. the machine is started with the inlet vanes closed
• B. the starter has timed-closed contacts
• C. the motor is never disconnected from the line during starting
• D. the motor is only temporarily disconnected during start-up

Answer: (C)

Closed transition starting keeps the motor on the power line during the entire start, so there is no interruption of current as it accelerates. This is achieved with a switching arrangement that either provides a brief parallel path or coordinates the transfer so the motor never loses connection to the supply. The other ideas don’t fit: inlet vanes refer to a different system, a timed-closed contact setup doesn’t define continuous connection, and temporary disconnection describes open transition, not closed transition.