2013%2BW%2B314%2BHW%2B2%2Bans

Not only spectacular sparks but all undesirable

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Unformatted text preview: and list your recommendations on how to create a safe working environment free of any sparks. Specify the following: Floor material Humidity in the room Cover of the desktop What fabric to wear Use of wristbands Use of dissipative materials Your recommendations Static dissipative material is preferable. Humidity should not be low (maintain above 60%) Use static dissipative mat. Cotton is preferred. Synthetic materials should be avoided if possible. Wear a wristband of dissipative material connected to the ground via 1-MΩ resistor. Keep sensitive electronic components in dissipative packages (foam, foil). Wear a wristband (see above) and use dissipative covers for the desk and floor. Things to avoid on desk top Plastic such as Styrofoam cups, magic tape, etc. Any other comments © 2013 EECS 314 Instructors (Optional answer but required action) Apply your learning and common sense: think about where and how the static electric charges can accumulate, and how they can be dissipated; act accordingly. EECS 314 Winter 2013 HW 2 Student’s name _______________________________ Discussion section # _____ (Last, First, write legibly, use ink) (use ink) Instructor is not responsible for grading and entering scores for HW papers lacking clear information in the required fields above Problem 2 Electric safety (70 points) Part 1 (20 points = 1 per question) 1. 2. 3. 4. 5. In the list below, circle the correct answer(s). To answer the questions, read: • “Safety lecture notes” posted on CTools • “From Electrical Safety Handbook” posted on CTools • The document online: http://sound.westhost.com/articles/electrocution.htm (sections “What can kill you” and the following). What levels of electric current through the human body are generally considered deadly? (check all that apply): a. 50 A b. 5 A c. 500 mA d. 50 mA e. 5 mA If the external electric current completely stops someone’s heart, will the heart restart itself? a. Never happens b. May happen but don’t count on it c. Most certainly, yes. An electric shock across one hand (finger to finger or finger to thumb) is… (check all that apply): a. Impossible b. Deadly c. Painful but usually not lethal d. May hurt and burn. An electric shock that throws a person across the room is… a. Impossible, except if a lightning bolt hits the person directly b. Quite likely...
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This note was uploaded on 09/30/2013 for the course EECS 314 taught by Professor Ganago during the Winter '07 term at University of Michigan.

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