| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.13 |
| Score | 0% | 63% |
Which of the following is the preferred method for splicing wires?
wrap in small gauge wire |
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soldering |
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screw-on connectors |
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wire crimps |
Splicing is permanently joining two wires together. Splicing can be done with screw-on connectors or wire crimps but the preferred method for splicing is soldering. Soldering takes the most effort but results in a connection that is electrically and mechanically identical to the original wire.
Using a fuse with a current rating higher than that required by a circuit:
is required |
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makes the circuit less safe |
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makes no difference |
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is recommended |
A fuse is a type of low resistance resistor that stops current flow in a circuit in response to a larger than intended electric current flow. Using a fuse with a higher current rating than required by a circuit is less safe as it could potentially allow overcurrent and risk a fire or heat-related equipment damage.
Which of the following is not a purpose of a resistor in an electrical circuit?
moderate the heat in the circuit |
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multiply the current in the circuit |
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control the voltage in the circuit |
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limit the current in the circuit |
Resistors can be chosen in a wide variety of values to control the voltage in a circuit, limit the current, or moderate the heat produced by the components in the circuit.
Which of the following statements about electrical resistance is true?
the more resistive the conductor is the faster electron flow will be |
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the more resistive the conductor is the slower electron flow will be |
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electrically conductive materials have no resistive properties |
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the less resistive the conductor is the slower electron flow will be |
Resistance is opposition to the flow of current. As resistance increases, current decreases as resistance and current are inversely proportional.
In an electronic circuit, a thermocouple can be used to:
link the temperature of one component in the circuit to that of another component in the circuit |
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open or close a circuit at a designated temperature |
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increase or decrease the temperature of a component in the circuit |
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keep the circuit at a designated safe temperature |
A thermocouple is a temperature sensor that consists of two wires made from different conductors. The junction of these two wires produces a voltage based on the temperature difference between them and can be used like a switch to open or close the circuit at a designated temperature.