101 Basic Series - Module 24 - CEU Education Your final score on this exam will be emailed to you for your records. First name:   Last name:   Company name:   E-Mail Address   City   State   NO STATEALAKASAZARCACOCTDEDCFMFLGAGUHIIDILINIAKSKYLAMEMHMDMAMIMNMSMOMTNENVNHNJNMNYNCNDMPOHOKORPAPRPWRISCSDTNTXUTVTVIVAWAWVWIWY Province (Optional)   Country (Optional)   1 Relay ladder logic utilizes basic relay wiring symbols to create the logic to control a machine or process. True False 2 Hard-wired devices are used to configure PLC logic. True False 3 An alarm horn is an ____ device to a PLC. Input Output Both 4 A PLC scan cycle consists of three important steps: check the input status, execute program, and update output status. True False 5 ____ are connected to the outside world, physically exist, and receive signals from switches, sensors, etc. Input relays Internal relays Output relays Timers 6 A PLC uses logic functions which are programmed into its memory. True False 7 Three things must be known before a counter can be used: address of the input pulse, how many pulses before reaction, when and how the counter is reset. True False 8 The primary reason PLCs were developed was to eliminate the large cost of replacing complicated relay-based machine controls. True False 9 PLC registers store the off and on states of the instructions based on their address. True False 10 PLC scan time is defined as the time it takes the PLC to ____. Check the input status Execute the program Update the output status All of the above None of the above 11 ____ are connected to the outside world, physically exist, and send signals to solinoids, lights, etc. Input relays Internal relays Output relays Timers Counters 12 Communications with PLCs can be done between "Master" CPUs to "Slave" expander units in remote I/O networks. True False 13 PLCs come in two basic forms: Block I/O and Rack mount I/O. True False 14 A timer is an instruction that waits a set amount of time before doing something. True False 15 Typically, PLC counters count from ____ if they are 16-bit BCD (binary coded decimal). 0 to 9999 -32,768 to 32,767 0 to 65,535 None of the above 16 Hundreds of I/O devices can be controlled with rack mounted PLCs. True False 17 These are symbols used to indicate a ________. Normally Open Input Contact Normally Closed Input Contact Normally Closed Output Contact Output Device (Coil) 18 CPU stands for Control Processing Unit. True False 19 A photoelectric, proximity sensor, or limit switch is an ____ device to a PLC. Input Output Both 20 The numbering system in computers and PLCs is the decimal system. True False

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