How are the plugs on a cylinder spaced when there are 3 plugs?

When there are three plugs on a cylinder, they are spaced at 120 degrees apart from each other. This spacing results from the fact that a full rotation of 360 degrees is divided equally among the three plugs. Therefore, 360 degrees divided by 3 equals 120 degrees. This configuration ensures that each plug is evenly distributed around the cylinder, facilitating proper operation and maintenance.

In contrast, other spacing options would not provide balanced distribution of plugs around the cylinder. For instance, 90 degrees would suggest there are four plugs, and 180 degrees would imply only two plugs. Having the plugs spaced 360 degrees would mean they are overlapping at a single point. Thus, the spacing of 120 degrees is essential for maximizing evenly distributed access or effectiveness of each plug on the cylinder.