Which outcome occurs when soot accumulates excessively on a diesel engine's fuel injector nozzles?

💡 Explanation

When soot accumulates excessively, fuel spray pattern distorts because soot blocks small orifices leading to incomplete combustion and increase in unburnt hydrocarbon emissions from the engine exhaust. Therefore increased hydrocarbon emissions, rather than other options which require different issues.

• Which risk increases when a hydraulic actuator suddenly stops rapidly due to cavitation?
• Which limit is reached when a positive displacement pump, moving a viscous fluid through long piping, experiences high frequency hydraulic fluctuations?
• Which risk significantly increases when injecting fuel directly into cylinder heads?
• Which outcome occurs when moisture enters a refrigeration system's sealed capillary tube?
• Which outcome results when chromatic dispersion widens pulses in a fiber-optic multiplexing system?
• Which outcome occurs when halogenated refrigerant leaks into an open flame?