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Self-Test 1
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Match the device on the left with its purpose on the right.
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Circuit breaker 1. Protects circuits
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Relay 2. Electric switch
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Solenoid 3. Variable control
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Rheostat 4. Movable core
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What best describes tapped or stepped resistors?
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They have two or more fixed values.
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They have only one unchangeable rating.
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They have a variable range of resistance.
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They are used to control charging systems.
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How is a fuse different from a circuit breaker?
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A fuse acts like a diode.
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A circuit breaker doesn’t need a ground.
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A fuse can be reset and a circuit breaker cannot.
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A circuit breaker can be reset and a fuse cannot.
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6 gauge wire is smaller than 18 gauge.
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True
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False
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What are conductors normally made from?
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Steel
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Copper
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Soft iron
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Aluminum
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Receptacles are one-half of a two-piece multi-contact connector.
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True
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False
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What are circuit breakers, fuses, and thermal limiters all examples of?
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Relays
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Switches
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Receptacles
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Protection devices
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How many gauges of difference must there be between a fusible link and a conductor?
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2
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4
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6
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8
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Relays require a power circuit and a control circuit.
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True
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False
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What are transformers used for?
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To act like a relay
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To increase amperage
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To increase or decrease voltage
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To change the current from DC to AC
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Who is responsible for testing all electrical components?
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ITA
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NSA
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CSA
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DNA
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Closed
means the circuit is complete and conducting.
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True
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False
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What voltage other than 120 V does a residential system use?
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180 V
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200 V
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240 V
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280 V