Automation System - Section 1 Multiple Questions and Answers.




21.Semiconductor devices:
A. are less reliable than electro¬mechanical components
B. usually have a very short MTBF (mean time between failure)
C. have a very short infant mortality period
D. All of the above

22.A drum timer is a good example of:
A. an output actuator
B. an input sensor
C. a position sensor
D. a sequence controller

23.The formula for memory capacity is:
A. MC = N/2
B. MC = 2/N
C. MC = N squared.
D. MC -2 to the Nth power

24.How is the integral mode implemented using analog methods?
A. Op amp and resistors
B. Op amp and a capacitor
C. Op amp and an RC network to place the error voltage across the capacitor
D. All of the above

25.The general type of process found in industry is:
A. discrete parts
B. continuous
C. batch
D. All of the above

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