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

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.

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.