Question

Diesel fuel combustion propagates as OA diffusion flame A premixed flame O both diffusion and premixed flame O neither diffusion nor premixed flame When comparing Dl and IDI diesel engines, the IDI diesel has O lower injection pressure and higher thermal losses O higher injection pressure and lower thermal losses O higher injection pressure and higher thermal losses O lower injection pressure and lower thermal losses The potential advantages and challenges of HCCl over more traditional combustion strategies are O Higher efficiency and low NOx but control challenges O Higher efficiency and low PM but NOx challenges O Lower NOx and PM but lower efficiency O Higher efficiency and low CO but control and NOx challenges Exhaust temperatures in an HCSI engine with stoichiometric AFR tend to Decrease as spark timing is retarded since burn is completed later. O Increase as spark timing is retarded since burn is completed later. O Increase as spark timing is advanced due to higher cylinder pressure. Decrease as spark timing is advanced due to knock Choose the incorasd tatement HCSI knocx motkely th oecur at O high compression ratio O operation with high octane fuel low speed operation O advanced timing

Answer 1

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