A four-stroke, cycle, turbocharged, 1000 horsepower diesel engine has been operating under load. The load suddenly increases, causing excessive black exhaust smoke, and a rapid rise in the lube oil temperature. In response to this condition, you should __________.
• Engine load vs. fuel-air ratio and how this affects exhaust color • What black exhaust smoke indicates about combustion in a diesel engine • Normal causes of a rapid rise in lube oil temperature under sudden load change
• Which action directly addresses the root cause of overloading and poor combustion rather than just treating a symptom? • If combustion is producing excessive black smoke, what operational change would immediately improve the fuel-air balance? • How would continuing at the same or higher load affect both exhaust condition and lube oil temperature?
• Identify which option changes engine load rather than just monitoring or secondary systems • Consider which choice would most quickly prevent engine damage from overload and high temperatures • Eliminate options that only involve checking or adjusting without actually reducing the stress on the engine
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