26. One advantage of a PC in industrial control is that it:

A. has a reliable long life compared to relay logic
B. is very difficult for the inexperienced programmer to understand
C. is unreliable because there are no moving parts
D. All of the above
E. None of the above

27. An operating system:

A. is required to run a microprocessor system
B. provides a structure with which to develop application programs
C. is useful because standard modules can be used
D. both (b) and (c)
E. None of the above.

28. When one must sell a project to management, the most important document he or she can produce is a:

A. method for financing the project
B. summary of the problem
C. project evaluation
D. procedure for purchase
E. None of the above

29. What is required to enable the PC to emulate a graphics terminal?

A. Software
B. A laser printer
C. A color monitor
D. A graphics board
E. None of the above

30. Which type of digitizer measures a wave traveling at the speed of sound?

A. Electrostatic
B. Sonic
C. Digitizing sr amer
D. Caparitive
E. None of the above