PLC Study Review Practice Test.

PLC Study Review Practice Test. Which of the following is not a suitable application for a PLC? - CORRECT ANSWER To control a computer numerical control (CNC) machine PLC are _____ designed for use in the control of a wide variety of manufacturing machines and systems - CORRECT ANSWER Special-purpose industrial computers When comparing a relay-based control system to a PLC, which of the following is not an advantage of the PLC? - CORRECT ANSWER Capable of switching higher output currents The part of a PLC that executes the logic program is the _____ - CORRECT ANSWER Processor The purpose of a digital output module is _____ - CORRECT ANSWER To energize loads in response to PLC instructions Which of the following is the proper sequence of operation within a PLC? - CORRECT ANSWER Examine inputs, perform logic, update outputs Which of the following is how input and output modules communicate with the CPU? - CORRECT ANSWER By a series of electrical connections in the backplane Which of the following does not apply to the optical isolator circuit in the I/O modules? - CORRECT ANSWER Converting analog signals to digital signals for processing Which of the following is a common language used to program PLCs that uses a graphical representation of relay circuits? - CORRECT ANSWER Ladder logic Which of the following two broad categories are PLC memories divided into? - CORRECT ANSWER Program and data files Which of the following is the type of PLC memory file used to address hardwired inputs? - CORRECT ANSWER Input image Which of the following components does a PLC processor normally not contain? - CORRECT ANSWER Relay Which of the following is referred to by the tag name "local"? - CORRECT ANSWER Module defined Which of the following is the purpose of the input interface module? - CORRECT ANSWER it connects the CPU to signals from the process Which of the following is a consideration for selecting an output module for a PLC? - CORRECT ANSWER The type of low voltage load driven Fuse indicator may be located on the _____ - CORRECT ANSWER Output modules Which of the following modules must be used with a current sourcing sensor? - CORRECT ANSWER A current sinking input module