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65 Cards in this Set
- Front
- Back
- 3rd side (hint)
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Best Deterant for work related injuries is ... |
Common sense and good judgement |
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Most equipment has a... |
Safeguard |
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Primary factors for shock severity... |
1. The amount of current flowing thru the body. 2. The path of the current going they the body. 3. The length of time the body is in the circuit. |
APpLe |
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Current is measured in... |
Amperes |
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12 mA AC freezes body 60 mA DC freezes body How much is lethal? |
100-200 mA over 200 doesn't cause death if medical attention is sought immediately. |
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Types of electrical burns are... |
Electrical Burns(most common) Arc Burns Thermal Contact Burns |
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Electrical Accidents |
1. Unsafe equipment or installation 2. Workplace made unsafe by the environment 3. Unsafe work practices |
Can be avoided if common sense is used and have good judgement! |
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Types of Protection when working with electrical equipment are... |
1. Insulation 2. Guarding 3. Grounding 4. Safe work practices |
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Steps in case of electrical fire... |
1. De-energize the circuit 2. Call the fire department 3. Control or extinguish the fire with the correct fire extinguisher 4. Report the fire to the appropriate authorities |
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ANSI Red means... |
Emergency shut down devices, fire fighting equipment, and containers storing flammable liquid |
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ANSI Orange means... |
Identifies dangerous parts or sections of machines or equipment |
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ANSI Blue means... |
Identifies safety info on signs, posters, and labels |
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ANSI Yellow means... |
Cautionary color, more commonly than blue, contrast with black |
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ANSI Green means... |
Identifies first aid safety equipment such as emergency showers and eye wash stations |
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ANSI Purple means |
Identify radiation hazards |
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ANSI Black and white means |
Used for text and background on safety warning signs |
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Electromotive Force is... |
The force in which causes an atom to gain or lose an electron |
Physical push/ squeeze Also known as voltage( just a force ) Measured in Volts |
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Electrostatic means |
A charge/electricity at rest |
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Potential Difference |
The push that can have on elections Between two groups of ions *amount of electrons pushed out of an atom |
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Potential Difference |
The push that can have on elections Between two groups of ions *amount of electrons pushed out of an atom |
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6 ways electrons are forced to leave an Atoms orbit are... |
1. Friction 2. Pressure 3. Heat 4. Light 5. Magnetism (most common ex. Battery) 6. Chemical action |
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Current is... |
The movement or flow of electrons (physically moving object) Measured in Amps/amperes Identifies by I |
Flows from negative to postive |
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Current is... |
The movement or flow of electrons (physically moving object) Measured in Amps/amperes Identifies by I |
Flows from negative to postive |
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Conductors ... |
Provide a path for current to flow(road) |
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Current is... |
The movement or flow of electrons (physically moving object) Measured in Amps/amperes Identifies by I |
Flows from negative to postive |
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Conductors ... |
Provide a path for current to flow(road) |
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Major factors affecting conductors are... |
1. Specific restitivity of the conductor 2. Length of the conductor 3. Cross sectional Temp is a minor factor |
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Insulators are... |
Glass Paper Rubber Plastic |
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Insulators are... |
Glass Paper Rubber Plastic |
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A circuit needs... |
Power Source Load (resistors) Path for current |
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Resistors are... |
Type of load designed to control current to a more useable level Identified by R and numeric value Measured in ohms! |
R1, R2, R3, etc. |
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As resistance increases, ______ current will flow |
Less |
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On a schematic diagram signal flows from... |
Left to Right |
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The power supply on a schematic diagram is located... |
Lower left of the schematic diagram |
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The power supply on a schematic diagram is located... |
Lower left of the schematic diagram |
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AVC( Automatic Volume Control) C stands for ... |
Capacitor |
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S stands for ... |
Switch |
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S stands for ... |
Switch |
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D stands for... |
Diode |
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S stands for ... |
Switch |
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D stands for... |
Diode |
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T stands for... |
Transistor |
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S stands for ... |
Switch |
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D stands for... |
Diode |
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T stands for... |
Transistor |
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TP stands for... |
Test Point |
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The purpose of a switch is to... |
Apply power to a system and different output Open or close a current path |
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A switch in an open position |
1. Does not allow current to flow 2. Maximum Resistance |
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A switch in a closed position... |
1. Allows current to flow 2. Has minimum resistance |
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_./ _ what is this symbol |
Toggle(most common) |
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_. ! ._ ! What type of symbol is this? |
Rotary |
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_. ! ._ ! What type of symbol is this? |
Rotary |
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_. .◽️._ What type of symbol is this? |
Slide |
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_. ! ._ ! What type of symbol is this? |
Rotary |
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_. .◽️._ What type of symbol is this? |
Slide |
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_.---._ what type of symbol is this? |
Push Button |
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Throw... |
Indicates path for current |
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Poles... |
#of current paths |
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What do protection devices do? |
They sense excessive increases in current flow and open circuits |
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What do protection devices do? |
They sense excessive increases in current flow and open circuits |
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What types of protection devices are there? |
Fuses(rated in AMPS) and Circuit Breakers |
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_.~._what type of symbol is this? -[=]- |
Fuse |
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What type of symbol is this? |
Circuit Breaker |
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What types of fuses are there? |
Fast Action- melts less than 1 second Slow Blow- 1 to 30 seconds depending on overload |
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What types of circuit breakers are there? |
Magnetic- generates a magnetic field Thermal- operates on temperature |
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