Question 98Motor Plants - Assistant Engineer
70% to passThe rate of pressure rise during the period following fuel ignition in a diesel engine is influenced by the length of the ignition delay period and the _______________.
Avalve overlap
Bvolumetric efficiency
Cturbulence of the air charge
Dfuel efficiency
AI Explanation
The correct answer is C) turbulence of the air charge. The rate of pressure rise during the period following fuel ignition in a diesel engine is influenced by the length of the ignition delay period and the turbulence of the air charge. The turbulence of the air charge affects the mixing of the fuel and air, which in turn influences the rate of combustion and the rate of pressure rise. Increased turbulence leads to better fuel-air mixing, resulting in a faster rate of pressure rise. The other options, such as valve overlap (A), volumetric efficiency (B), and fuel efficiency (D), do not directly affect the rate of pressure rise in the same way as the turbulence of the air charge.
Related Questions
Q247:The device shown in the illustration is a_______________. Illustration MO-0008 ... Q407:The governor, shown in the illustration, will have its preset speed droop altere... Q199:Starting air check valves are held firmly on their seats by_______________. Q155:The diesel engine component labeled "1", shown in the illustration is called a/a... Q28:In describing engine operation, what does the term "cycle" mean?
Ready to test your knowledge?
Take a Motor Plants - Assistant Engineer Practice ExamOfficial Resources