Question 38Motor Plants - Assistant Engineer70% to pass
The theoretical minimum compression ratio necessary to ensure compression ignition in a direct injection diesel engine is_______________.
AI Explanation
The correct answer is B) 12:1.
The theoretical minimum compression ratio necessary to ensure compression ignition in a direct injection diesel engine is 12:1. This is because the high compression ratio in a diesel engine is required to generate enough heat and pressure to ignite the air-fuel mixture without the need for a spark, as in a gasoline engine. A compression ratio of at least 12:1 is typically needed to achieve this in a direct injection diesel engine.
The other answer choices are incorrect because 10:1 would not provide sufficient compression, while 16:1 and 20:1 are higher than the minimum required for compression ignition in a direct injection diesel engine.
Related Questions
#36 The compression ratio of a diesel engine refers to the ratio between the _______________. #37 If the compression ratio is increased on any diesel engine,_______________.#39 Which of the following relationships exist between the temperature developed in a combustion space, and the compression ratio of the engine? #40 The ratio of the brake horsepower to the indicated horsepower of a diesel engine is its_______________. #41 The most important factor in engine performance is the actual power output at the end of the crankshaft available for doing work. This is known as_______________.