BEC Annex 1: Concepts

What is electrostatic discharge?

• A sudden flow of electricity between two charged objects

• The release of electricity from a battery

• The leakage of fluid from a damaged component

• A dance move that involves shuffling your feet on a carpet floor and touching a doorknob

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BE.01.02 ESD Safety

What can cause electrostatic discharge?

• Friction

• Induction

• Separation

• Temperature

• Light

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BE.01.02 ESD Safety

What are the factors of an electrical shock?

• Body resistance

• Path through the body

• Length of time of shock

• Conductivity of materials involved

• Current weather conditions outside

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BE.01.02 ESD Safety

What are the effects of an electrical shock with the given current?

• 120-pound person can't let go

• 16.0 mA

• Irregular contractions of the heart

• 10.0 mA

• 175-pound person can't let go

• 18.0 mA

• Slight tingling sensation

• 1.1 mA

• Paralysis of chest muscles

• 65.0 mA

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BE.01.02 ESD Safety

In order of priority, what should you do when someone is being shocked?

• Kick them off the conductor

• Check they are breathing

• Try to shut off the power source

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BE.01.02 ESD Safety

What is grounding in terms of electricity?

• A path for current to flow in the case of a short/open to minimize shock hazard

• A punishment that restricts a teenager's actions

• Unplugging a circuit to minimize shock hazard

• The use of insulation to minimize shock hazard

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BE.01.02 ESD Safety

Choose the options that would maintain a safe workspace

• Keep the work area clean and free of clutter

• Get permission before starting work

• Utilize PPE such as safety goggles, gloves, and insulated footwear

• Before working on a circuit, ensure it is not energized

• Wear a tinfoil hat to protect against electrical interference

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BE.01.02 ESD Safety

How would you properly use an ESD field mat and wrist strap to protect your equipment from ESD?

• Connect the ESD field mat to a grounded outlet and wear the wrist strap and attach it to the mat

• Place the ESD field mat on the floor and dance on it while wearing the wrist strap to generate a grounding connection

• Connect the wrist strap to the workstation and the ESD field mat to a nearby window to allow static charges to escape

• Wrap the wrist strap around the ESD field mat and place them on the workstation to create a static-free zone

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BE.01.02 ESD Safety

How can you verify your workstation is properly grounded?

• Use a multimeter to measure the electrical resistance between the workstation's ground point and the main grounding point

• Sprinkle water on the workstation and see if it conducts electricity

• Check if the workstation is connected to a power source with a visible cable

• Place a magnet near the workstation and observe if it is attracted or repelled

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BE.01.02 ESD Safety

What is the purpose of scientific notation or engineering notation?

• To express very large or very small numbers in a more compact form

• To increase the precision of numbers with extra decimal places

• To create a unique numbering system exclusive for scientists and engineers

• To impress friends with fancy looking numbers

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BE.01.03 DC Theory