Nate Electrical Practice Exam

What type of acting is characterized by contacts that close when the pressure increases?

1. Direct acting

2. Reverse acting

3. Dual acting

4. None of these

The correct answer is: Direct acting

In the context of pressure and control systems, direct acting components are those that close contacts in response to an increase in pressure. This behavior is essential in various applications, such as safety cutoffs or pressure sensors, where a certain pressure threshold is critical for maintaining proper system function. Direct acting mechanisms are designed so that as pressure builds within a system, they initiate a response by changing their state. In the case of contacts, this means that when pressure increases, the contacts are designed to close, thereby signaling that a specific condition has been met. This type of action is particularly important for applications requiring reliable response to rising pressures, which could indicate a potential hazard if left unchecked. Understanding the workings of direct acting devices allows for more effective design and implementation of safety measures in both residential and industrial systems.