Compression ratio of diesel engines may have a range: A. 8 to 10 B. 10 to 15 C. 16 to 20 D. none of the above

The compression ratio of a Diesel engines ranges from14:1 to as high as25:1.

Thank you for inviting me

What I know about it , is that they can have an range of D:16-20, but I think that is special

Diesel engine

http://en.wikipedia.org/wiki/Compression_ratio

Therefore I would say D none of the above

There is no electrical sparking plug in an auto-ignition diesel engine; the heat of compression raises the temperature of the mixture to its auto-ignition point. The CR will customarily exceed 14:1 and ratios over 22:1 are common. The appropriate compression ratio depends on the design of the cylinder head. The figure is usually between 14:1 and16:1 for direct injection engines, and between18:1 and23:1 for indirect injection