Question 110Motor Plants - Assistant Engineer

The correct answer is A. The indicator diagram labeled A depicts a condition that should be corrected by retarding the engine timing. This is because the diagram shows a late-closing exhaust valve, which can be addressed by retarding the engine timing to allow the exhaust valve to close earlier in the cycle. The other options, B, C, and D, depict different conditions that would require different corrective actions, such as adjusting the valve clearances or checking for mechanical issues. Retarding the timing would not be the appropriate solution for those scenarios.