Final answer:
The school bells that mark the beginning and end of classes are operated by a sequential control system. School bells are typically operated by a computer control system, which allows for precise scheduling of bells ringing at specific times. The correct answer is A. computer control.
Step-by-step explanation:
The school bells that mark the beginning and end of classes are operated by a sequential control system.
A sequential control system is a type of control system that operates a process or system in a predetermined sequence of steps or events.
In the case of school bells, the sequential control system is programmed to ring the bells at specific times to signal the start and end of classes.
School bells are typically operated by a computer control system, which allows for precise scheduling of bells ringing at specific times. The correct answer is A. computer control.
The school bells that mark the beginning and end of classes are typically operated by a computer control system. This type of control system can be programmed to adhere to a specific schedule, ensuring that bells ring at the predetermined times throughout the school day. The option that best fits this description is A. computer control. Unlike robotic control, which refers to systems that manipulate mechanical robots, or master control, which might oversee various systems but not specifically pertain to automated timed signals, a computer control system is designed for precise, repeatable operations based on time. Sequential control, which refers to processes that occur in a set sequence, might seem like a possible answer, but it does not specifically describe a system that operates based on timing schedules by itself.