How many revolutions are required to complete the induction and compression strokes in a six-cylinder four-stroke engine?

In a six-cylinder four-stroke engine, each cylinder goes through the four strokes: induction (or intake), compression, power (or combustion), and exhaust in a complete cycle. Each cycle requires two revolutions of the crankshaft to complete all four strokes for one cylinder.

However, during those two revolutions, all cylinders are not going through the same stroke simultaneously due to their design. In fact, in a six-cylinder four-stroke engine, as one cylinder is going through the induction stroke, another might be in the compression phase, and the remaining cylinders will be in various stages of their cycles.

When considering how many revolutions are required to complete the induction and compression strokes specifically for all six cylinders, it is important to note that it takes two revolutions to complete the full cycle for all cylinders. However, when asked about how many revolutions are necessary to complete just the induction and compression strokes across the six cylinders collectively, it is indeed one complete revolution that encompasses the induction and some of the compression strokes for those cylinders.

Thus, one revolution of the crankshaft allows for the induction and initial part of every cylinder's compression stroke to occur in a four-stroke engine setup. This is why the correct answer is one revolution for