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MCQs

Total Questions : 474 | Page 16 of 48 pages
Question 151. Relay ladder logic is used in a PC because:
  1.    it is impossible to write a control program for a machine in any other logic
  2.    it is the best industrial control language ever developed.
  3.    most industrial control personnel are familiar with relay ladder logic diagrams and this is the easiest for them to use
  4.    All of the above
  5.    None of the above
 Discuss Question
Answer: Option C. -> most industrial control personnel are familiar with relay ladder logic diagrams and this is the easiest for them to use
Question 152. The "end-effector" of a robot:
  1.    can be an actual tool
  2.    is the robot "hand"
  3.    may have a gripping action
  4.    All of the above
  5.    None of the above
 Discuss Question
Answer: Option D. -> All of the above
Question 153. The program execution time:
  1.    must be slower than the fastest mechanical operation that is to be controlled
  2.    will vary depending on the language used
  3.    cannot be changed once the program is written
  4.    All of the above
  5.    None of the above
 Discuss Question
Answer: Option B. -> will vary depending on the language used
Question 154. One advantage of a PC in industrial control is that it:
  1.    has a reliable long life compared to relay logic
  2.    is very difficult for the inexperienced programmer to understand
  3.    is unreliable because there are no moving parts
  4.    All of the above
  5.    None of the above
 Discuss Question
Answer: Option A. -> has a reliable long life compared to relay logic
Question 155. An operating system:
  1.    is required to run a microprocessor system
  2.    provides a structure with which to develop application programs
  3.    is useful because standard modules can be used
  4.    both (b) and (c)
  5.    None of the above.
 Discuss Question
Answer: Option D. -> both (b) and (c)
Question 156. When one must sell a project to management, the most important document he or she can produce is a:
  1.    method for financing the project
  2.    summary of the problem
  3.    project evaluation
  4.    procedure for purchase
  5.    None of the above
 Discuss Question
Answer: Option C. -> project evaluation
Question 157. What is required to enable the PC to emulate a graphics terminal?
  1.    Software
  2.    A laser printer
  3.    A color monitor
  4.    A graphics board
  5.    None of the above
 Discuss Question
Answer: Option A. -> Software
Question 158. Which type of digitizer measures a wave traveling at the speed of sound?
  1.    Electrostatic
  2.    Sonic
  3.    Digitizing sr amer
  4.    Caparitive
  5.    None of the above
 Discuss Question
Answer: Option B. -> Sonic
Question 159. An encoder:
  1.    is used to send telegraph signals
  2.    converts an input to a binary number
  3.    converts a binary number to a decimal number.
  4.    can have only four keys
  5.    None of the above
 Discuss Question
Answer: Option B. -> converts an input to a binary number
Question 160. Operator interaction directly with the CRT is accomplished via:
  1.    a digitizing tablet
  2.    vector scanning
  3.    a stylus
  4.    a touch terminal
  5.    None of the above
 Discuss Question
Answer: Option D. -> a touch terminal

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