General Static Awareness Test: 1. Static electricity is really nothing more than: a) b) c) d) 2. Static electricity will always be: a) b) c) d) 3. During field service repairs During printed circuit board assembly A single electronic device All of the above are true Which type of electronic failure is usually the most costly? a) b) c) d) 6. Attraction of dust and lint (contamination) Damage to electronic products Some materials to stick together All of the above are true Static can damage electronic devices at which level? a) b) c) d) 5. A negative charge A positive charge Either a positive or a negative charge Very difficult to control in a factory Some of the problems that static can cause are: a) b) c) d) 4. Basic chemistry A very simple form of electricity A subject which very little is known about Something that we in electronics should not worry about When a single device fails on a circuit board When a circuit board fails during test When a piece of assembled equipment fails during test When the product fails in the field, usually while a customer is using it. An electronic failure in the field can be very costly because: a) b) c) d) The customer will be unhappy with the product The failure could affect a piece of equipment that is very important, like medical. It is expensive to replace or repair a product in the field All of the above are true 7. The most common cause of device failure is: a) b) c) d) 8. Many electronic devices can be damaged at low voltage levels: a) b) c) d) 9. Become less sensitive to static Become more sensitive to static Become much more expensive Become very hard to find in the market How is it possible to damage electronics without touching it? a) b) c) d) 13. People Clothing Air movement Dust and dirt As electronic parts get smaller and smaller, they tend to: a) b) c) d) 12. 100 volts 10,000 volts 3,000 volts Well over 15,000 volts One of the biggest threats for static damage to electronics is: a) b) c) d) 11. 1,500 volts 100 volts 1,000 volts 3,000 volts Before you can feel a static discharge, it must be about: a) b) c) d) 10. Improper component testing ESD/EOS Problems with the die attachment There is no “most common” failure mechanism for devices. From heat generated by air movement From the electric field that a charged object has You must touch a part in order to damage it You cannot damage a part without touching it The closer a charged object is brought to an electronic part: a) b) c) d) The stronger the electric field will be The greater the chance of damaging the part This has no effect on the electronic part Both “a” and “b” are correct answers 14. If you are charged up, the static on you will: a) b) c) d) 15. Not be a problem if you are handling sensitive electronics Will cause you to feel rather weakened Will be attracted to an electronic part unless it is the exact same potential as you You cannot charge up a person with static Generally, what is a safe distance for charged objects on a bench? a) At least three feet or more b) Anything under four inches is OK c) No distance is safe d) 12 inches is a generally acceptable distance 16. A conductive object (like people) will: a) b) c) d) 17. These things can be easily grounded: a) b) c) d) 18. People Metal case of equipment A metal shelf Clear plastic bags and foam cups If there is no ground attachment available, then attach to: a) b) c) d) 20. Plastic drinking cups and bottles People Adhesive tapes, like Scotch™ Tape All of the above can be easily grounded with a wrist strap These things cannot be grounded and can generate a lot of static: a) b) c) d) 19. Allow electricity to flow through it Cannot be grounded Cannot generate static electricity All of the above are true Unpainted metal on the equipment that you will be working on A very large, insulated section of plastic Do not attach, but work very quickly to lessen any possible damage A ground attachment will always be available, in all cases When two conductors (a person and a metal case) are connected: a) b) c) d) It is called grounding It is called bonding It is called static neutralization It is called equal potential static elimination 21. Which of these statements is true? a) b) c) d) 22. Which is a true statement about ionized air? a) b) c) d) 23. A clear plastic bag A roll of Scotch™ Tape A metal bench top “a” and “b” are correct answers The best method to remove static from an insulator would be: a) b) c) d) 27. A dense cloud of positive ions only A dense cloud of negative ions only A dense cloud of both positive and negative ions A dense cloud of neutralized air blowing from a fan Which of these materials could be called “insulators”? a) b) c) d) 26. Control static on people who are walking Control static on plastic adhesive tapes and their dispenser Control static build-up on people working at a bench All of these are good applications for ionized air Which is the best description of ionized air: a) b) c) d) 25. It is used primarily to neutralize static on non-conductors It is a group of both positive and negative ions It should not be used to neutralize people These are all true statements Which of these would be a good application for ionized air? a) b) c) d) 24. A conductor will allow electricity to flow through it A non-conductor will allow electricity to flow through it People can be considered as being non-conductive In general, plastic boxes are a very good conductor To ground it To use ionized air To bond it to something made out of metal An insulator cannot generate static electricity If using an ionized air blower, the best way to use it would be: a) b) c) d) Position it so that it blows across the work surface area Position it so that it blows on you Position it to blow upwards to neutralize all the air in the work area Position it so that it does not blow across the work surface area 28. What does “ESD” stand for? a) b) c) d) 29. Static electricity can cause different types of damage to electronics: a) b) c) d) 30. The heat you feel from a very warm object The rainbow that you sometimes see after a storm Touching a doorknob and receiving a static shock Touching a doorknob and not feeling any shock If you touch an electronic device and do not feel any “zap”: a) b) c) d) 34. An ungrounded person touching sensitive electronics A charged object (such as a plastic cup) brought very close to electronics Handling a circuit board by the edges and not touching any parts All of the above can damage electronics This would be similar to a “static field.” a) b) c) d) 33. It is sometimes difficult to detect it without the proper measuring instruments Because it is seldom felt, many people don’t believe it’s a problem Both “a” and “b” are correct answers Static only affects a few different types of electronic parts and/or assemblies Which of these can cause static damage to electronics? a) b) c) d) 32. A device can be completely damaged where it will no longer operate A device can be weakened so that it will fail in the field while being used A device can fail intermittently: one minute it works, the next minute it will not All of the above are true statements This can be a major problem with ESD in an electronics facility: a) b) c) d) 31. “Devices Sensitive to Electricity” “Electrostatic Discharge” “Electricity Should Discharge” “Electrical Overstress” Then no static damage was done The device may have been damaged You do not have to feel static in order to cause damage Both “b” and “c” are correct answers Which level would most likely be the most expensive failure? a) b) c) d) A single device A printed circuit board A system failure, such as during final test of a piece of equipment A failure in the field 35. Which of these is NOT a good idea? a) b) c) d) 36. Which is NOT a true statement? a) b) c) d) 37. Using pink colored static bags to package non-electronic parts (hardware). Using a pink static bag to package a circuit board with Styrofoam “peanuts”. Using a pink static bag as a work order or diagram holder These are all good applications for pink static bags Which of these statements represents a GOOD application? a) b) c) d) 41. Pink colored static bags do not generate much static electricity Pink colored static bags protect electronics from static fields Pink colored static bags can never wear out All of the above statements are true Which of these statements represents a BAD application? a) b) c) d) 40. Only wear one strap Always wear two straps Test the straps on a regular basis to make certain they are working properly Both “b” and “c” are correct answers Which of the following statements are true? a) b) c) d) 39. As long as the wrist band touches bare skin, it will work properly Almost all wrist bands can be washed to clean them It does not matter which arm the wrist band is worn on A properly grounded person cannot generate much static If a person wears heel straps for grounding, they should: a) b) c) d) 38. Whenever you handle electronics, make certain that you are grounded A static bag can be used like a “potholder” to carry a circuit board You should test the static control equipment to make certain it is working Make certain that others entering your area are aware of ESD control Using a metalized static bag as a tray to carry electronic parts Using a metalized static bag as a “potholder” to carry electronic parts Using a metalized static bag to store electronic parts in These are all good applications for metalized static bags When using metalized static bags for packaging electronics: a) b) c) d) The bag should be sealed The bag should be large enough to completely contain the contents The bag should never be sealed with a label Both “a” and “b” are correct answers 42. Which of these is a true statement regarding metalized static bags? a) b) c) d) 43. Where should static control be used within an electronics company? a) b) c) d) 44. It is a stationary electrical charge (it doesn’t move around all the time) A very simple form of electricity that is fairly easy to control An electrical charge that can be either plus or minus All of the above The trend in the electronics industry is for parts to become: a) b) c) d) 48. To reduce product failures in the factory To reduce product failures in the field To increase the reliability of the products we handle and build All of the above are goals for controlling static One way to describe static electricity would be: a) b) c) d) 47. Everyone who handles electronics must be grounded Managers who handle electronics do not have to be grounded Engineers who handle electronics do not have to be grounded All of the above are true statements What is a goal for controlling static electricity? a) b) c) d) 46. Throughout the entire company Wherever electronic parts and assemblies are handled Only in the test department Only in the receiving and shipping areas Which of these statements is true? a) b) c) d) 45. These bags can never wear out – they will always protect parts Small holes in the bag do not affect its ability to protect parts These bags cannot shield out static electricity Using a staple to seal these bags cannot cause any problems Less sensitive to static electricity More sensitive to static electricity Much larger and less sensitive to static None of the above When humidity increases, static electricity will tend to: a) b) c) d) Decrease Increase Stay about the same Really cause a lot more problems 49. If you walk across a carpet and receive a pretty good shock: a) b) c) d) 50. You have discharged probably around 100 volts You have discharged probably around 1,000 volts You have discharged probably around 10,000 volts You have discharged probably around one million volts Static damages an electronic part by: a) b) c) d) Actually melting through one of the layers within it causing a short Actually causing the device to catch fire Actually causing the device to shrink in size Actually causing the device work more efficiently Answer Key (Static Awareness 101) 1. 2. 3. 4. 5. 6. 7. 8. 9. 10. 11. 12. 13. 14. 15. 16. 17. 18. 19. 20. 21. 22. 23. 24. 25. 26. 27. 28. 29. 30. 31. 32. 33. 34. 35. 36. 37. 38. 39. 40. 41. 42. 43. 44. 45. 46. 47. 48. 49. 50. B C D D D D B B C A B B D C D A B D A B A D B C D B A B D C D A D D B A D A B C D B B A D D B A C A