Solenoid Valves Questions & Answers – 4
Sketch arrows next to each of the two solenoid valves showing the directions of air flow in the energized (E) and de-energized (D) states, assuming both of the solenoid valves…
Solenoid Valves Questions & Answers – 3
Determine the “normal energization” states (e.g. NE or NDE) of each solenoid valve in this diagram, assuming the process valve needs to be closed when the process is running as…
Solenoid Valves Questions & Answers – 2
Solenoid valve SV-92 plays an important role in this compressor inlet separator control system. Level control valve LV-92 opens up when needed to drain liquid out of the “boot” of…
Solenoid Valves Questions & Answers – 1
A burner management system (BMS) monitors the status of the flame at the base of this incinerator, to ensure fuel gas does not keep entering the combustion chamber unless there…
Practical Process Control System Questions & Answers – 12
In this process, two chemical streams are mixed together in a reactor vessel. The ensuing chemical reaction is exothermic (heat-producing) and must be cooled by a water cooling system to…
Practical Process Control System Questions & Answers – 11
Examine this P&ID for a level control system in a vessel where two different fluids (Feed A and Feed B) are mixed together: Determine the effect on the control system’s…
Practical Process Control System Questions & Answers – 10
Examine this P&ID for a level control system in a vessel where two different fluids (Feed A and Feed B) are mixed together: Determine the effect on the control system’s…
Practical Process Control System Questions & Answers – 9
In this process, maple syrup is heated as it passes through a steam heat exchanger, then enters an evaporator where the water boils off. The purpose of this is to…
Practical Process Control System Questions & Answers – 8
In this process, two chemical streams are mixed together in a reactor vessel. The ensuing chemical reaction is exothermic (heat-producing) and must be cooled by a water cooling system to…
Practical Process Control System Questions & Answers – 7
There is a problem somewhere in this liquid flow control system. The controller is in automatic mode, with a setpoint of 65%, yet the flow indicator and the flow controller…
