Read and answer each of the following Automation questions posted below. Show work!

13) When your professor gives an assignment and collects it- but does not grade it or return it - is this is an example of an open or a closed loop 14) If the professor in example 13 randomly grades and returns the homework-if this were automation what would the random grading and returning process be referred to 15) What is the difference between a parameter anda variable 16 A light switch connected to a light is an example of open loop or closed loop 17) What is the primary purpose of an interrupt system being built into a control system 18) Name two levels of computer controls 19) In the world of automation what does ADC & DAC stand for and why are they necessary 20) Is your ignition switch in your car an actuator or a sensor