Question 19Motor Plants - Assistant Engineer

The correct answer is C) a 16 to 1 compression ratio. The volume line on the pressure-volume diagram is divided into 16 units, which indicates a 16 to 1 compression ratio. This means the volume of the cylinder at the end of the compression stroke is 1/16th of the volume at the beginning of the compression stroke. The compression ratio is a key design parameter for internal combustion engines and is commonly between 8:1 to 16:1 for typical marine applications. The other answer choices are incorrect because they do not correctly interpret the information provided in the pressure-volume diagram. The diagram does not specify the cylinder volume or compression pressure, and the 16 units do not represent crankshaft motion.