EXAMINATION 2712B2 Basic Industrial Computer Systems When you teeleonfidentthat you have mastered the materialn this study unit, complete the examination. Then submit only your answers lo school headquarters for grading, using one of the shipment. Send your answersfor this answer options described in your first tion as soon as you complete h. Donot wan unwanother exami ination is ready. Questions 1-20: Select the one best answer to.ach question a mainframe, or central, computer that you may 1. Which of the following is true of find in an industrial application? t interfaces with manufacturing processes directly. t eliminates any need for system firmware. It does away with most applications software D. receives information more workstations. 2. Multiplexing is a means of in order to channel data. of signals from many es onto one line organizing the transmisaon B. transmitting signals by chancing their amplitude, frequency, or and transmitting both synchronous and asynehronous sapnals simultaneously C, mixing D. mixing and transmitting both analog and digital signals digital inputs and outputs from machinery erounds by 3. The device shown isolates emitting to a phototransistor. C infrared A, visible ligh The pnmary purpose of interface hardware in an industrial control system is to A reduee the prooeraor's overhead nuntime B. provide compatibility between synchronous and aynchronous traurumissions. communications link between the MPU and peripheral devices. C. provide a D, connect the MPU to its internal registers