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Example 2 - h1016v2_66
Answers - h1016v2_68

Engineering Symbology Prints and Drawings Volume 2 of 2
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Logic Diagrams DOE-HDBK-1016/2-93 TRUTH TABLES AND EXERCISES Rev. 0 Page 17 PR-05 1. Identify by number the following logic symbols.               a. AND               b. OR               c. NOT 2. As drawn, with the hand switch in the AUTO position and no safety signal present, what is the status of the two inputs to Gate 4, on or off? 3. Since electrical components are drawn in their de-energized state, and using the answer from Question 2, is the flow solenoid valve (FSV-1-147) in its correct position?  Why? 4. How many ways can FSV-1-147 be energized?  De-energized? 5. If a safety signal is present, can FCV-1-147 (valve FSV-1-147 energized) be opened? Why?







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