What is the correct order of operations for a mechanical governor system?

The correct choice outlines a logical sequence of how a mechanical governor system operates. In such systems, the primary function is to maintain the engine speed within a desired range by adjusting the fuel supply or air intake as needed.

Initially, when the engine speed increases beyond a set point, the flyweights—which are attached to the governor—begin to spin faster due to the centrifugal force. As the speed increases, the flyweights force the sliding cup to move outward. This outward movement is a crucial step because it directly relates to how the governor system responds to changes in speed.

Once the sliding cup has moved due to the action of the flyweights, the governor arm is activated. This arm interacts with a spring mechanism that modulates the throttle. The arm’s movement pulls on the spring, thereby adjusting the throttle plate to decrease the amount of air or fuel entering the engine. This adjustment is essential for reducing engine speed back to the desired level.

Thus, the sequence where the flyweights first force the sliding cup, followed by the governor arm pulling on the spring, and finally leading to the adjustment of the throttle plate accurately represents the operation of a mechanical governor. The reasoning behind this order is that each step is sequential and dependent on the previous action to achieve the