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 An alarm horn is an ____ device to a PLC. Input Output Both 2 ____ are connected to the outside world, physically exist, and receive signals from switches, sensors, etc. Input relays Internal relays Output relays Timers 3 ____ are connected to the outside world, physically exist, and send signals to solinoids, lights, etc. Input relays Internal relays Output relays Timers Counters 4 Relay ladder logic utilizes basic relay wiring symbols to create the logic to control a machine or process. True False 5 These are symbols used to indicate a ________. Normally Open Input Contact Normally Closed Input Contact Normally Closed Output Contact Output Device (Coil) 6 The primary reason PLCs were developed was to eliminate the large cost of replacing complicated relay-based machine controls. True False 7 PLCs come in two basic forms: Block I/O and Rack mount I/O. True False 8 The numbering system in computers and PLCs is the decimal system. True False 9 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 10 A photoelectric, proximity sensor, or limit switch is an ____ device to a PLC. Input Output Both 11 Communications with PLCs can be done between "Master" CPUs to "Slave" expander units in remote I/O networks. True False 12 CPU stands for Control Processing Unit. True False 13 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 14 Hundreds of I/O devices can be controlled with rack mounted PLCs. True False 15 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 16 A PLC scan cycle consists of three important steps: check the input status, execute program, and update output status. True False 17 A timer is an instruction that waits a set amount of time before doing something. True False 18 PLC registers store the off and on states of the instructions based on their address. True False 19 Hard-wired devices are used to configure PLC logic. True False 20 A PLC uses logic functions which are programmed into its memory. True False

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