T/F When in the manual mode, the controller performs the decision-making process. How much force is exerted on the 4-inch-diameter diaphragm of a valve actuator if 12 psi of air pressure is applied? Define P&ID. Identify various instruments by the shapes of balloons that represent them. Identify and interpret functional identifiers in balloon symbols. Describe how tag numbers pertain to an instrumentation loop. Describe the function of line symbols. Identify the symbols for various actuators and valves. Read a simple loop on a P&ID. Describe the various types of information on a title block.