Q. Dark, black smoke from diesel engines usually results when engine is

(A) Idling
(B) Running at slow speeds
(C) Running at light loads
(D) Running at full load and full speed

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✅ Correct Answer: (D) Running at full load and full speed

Published by Mr. Dubey ⭐ 111.54K Points at 19-Sep-2023 08:09 pm in Environmental Engineering

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