Final answer:
The required actual mechanical advantage (MA) of the industrial steam shutoff valve system is 5. It is found by dividing the resistance force of 200 lb by the effort force of 40 lb.
Step-by-step explanation:
The student is asking about the actual mechanical advantage (MA) required for an industrial steam shutoff valve system. To calculate the actual MA, we divide the resistance force by the effort force. In this case, the resistance force is 200 lb, and the effort force is 40 lb.
The calculation would be: Actual MA = Resistance Force / Effort Force = 200 lb / 40 lb = 5.
Therefore, the required actual MA of the system is 5.