Engine_2014 : Motor Plants and Auxiliary Boilers - 1674/2614
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| A diesel engine experiences a sudden loss in speed, accompanied by black exhaust smoke, with the fuel rack at maximum, and the speed remaining below normal. The probable cause is __________ . |
| A) engine overload |
| B) leaky valves |
| C) stuck or broken piston rings |
| D) low air injection pressure |
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