Which end-of-shift test is used to confirm the on-coming ratio after synchronous speed is detected?

• A. Off-going ratio test
• B. Ramp-off rate test
• C. Range verification test
• D. On-coming ratio test

Answer: (D)

The exact thing being tested is ensuring the incoming system matches the expected drive ratio once synchronous speed is reached. When a handover occurs, you want to confirm that the on-coming gear or drive ratio is correct so the new operator has a properly aligned setup and there won’t be a mismatch as the system settles into operation. That’s why the end-of-shift test used for this purpose is the on-coming ratio test—it specifically verifies that the incoming ratio is correct after synchronous speed is detected.

The other tests are not about confirming the incoming ratio: an off-going ratio test checks the outgoing system’s ratio before handover, ramp-off rate test concerns how quickly the system decelerates or ramps down, and range verification test checks operation across the system’s limits.