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UEECD0046 Solve problems in single path circuits [ULT]

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7.  Read the statements carefully and indicate True or False:

- Residual Current Devices (RCDs) are a key protective measure specified in AS/NZS 3000 to prevent electric shock.

- AS/NZS 3000 describes a suitable method of protection against the damaging effects of overcurrent is by protecting circuits with a suitable fuse or circuit-breaker.

- AS/NZS 3000 allows for unprotected live conductors in circuits, as long as they are housed in a secure enclosure.

- Earthing systems are not required under AS/NZS 3000, as they do not significantly protect against electrical faults.

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6. A sacrificial anode in a hot water system uses the chemical effect of electric current; what is the purpose of the anode?

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5.  Match the descriptions of the typical uses to the effects of current:

- Electric motor

- Defibrillators

- Operation of a fuse

- Electroplating

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4. Besides heat, what is the other effect that is always present when current flows in a conductor?

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3.  Match the effect of electric current with the description of principles:

 effect occurs due to resistance in the conductor.

effect occurs when electrons move and release energy as photons.

effect results in electrolysis causing a reaction.

effect of electromagnetic fields producing motion.

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2.  Select the suitable method of protection against contact with parts of an electrical installation that are live during normal service according to AS/NZS 3000.

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1.  Select the physiological effects of electric current on a person.

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1. Select the explanation that describes the relationship between work and energy.

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6. What would be the result of using a resistor that is below the required power rating in a circuit?
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5. A current of 1A is passed through each of the resistors in the following circuits that have equal value resistance but with different Power Ratings. Which of the 3 resistors has the correct power rating?

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