EE3401-ELECTRICAL TRANSMISSION AND DISTRIBUTION

The diagram shows an apparatus.

Which of the following statements are true about the apparatus? (3 answers)

• It is used to change a low input voltage to a higher output voltage

• It alters the voltage of alternating current

• It is used to change a high input voltage to a lower output voltage

• It helps to reduce energy wastage during the transmission of electrical energy

The diagram shows a common electrical device.

What are the safety features shown in the device. (2 answers)

• Live wire

• Earth wire

• Neutral wire

• Fuse

Some energy source are renewable while some are non - renewable.

Choose on non - renewable energy sources.(2 answers)

• Natural gas

• Water

• Geothermal

• Coal

Which of the following is not a renewable energy source?

• Nuclear energy

• Hydro energy

• Biomass energy

• Solar energy

Fossil fired generation is associated with

• Water

• Atoms

• Oil, coal or gas

• Steam

Something that can convert electrical energy into other forms of energy (ex. light bulb, fan, tv, radio)

• resistor (device)
• source
• conductor

Which of the following describe the characteristics of non-renewable energy sources?

i) can be depleted if the usage is not controlled

ii) takes millions of years to be formed

iii) can cause environmental pollution

iv) have limited sources

• i, ii and iii

• i, ii and iv

• i, iii and iv

• ii, iii and iv

When the circuit shown is closed, none of the bulb lights up in the circuit above. Only one of the objects, A, B or C is an electrical insulator. Which one is it?

• A
• B
• C

___________ disconnects the current supply temporarily when it is not needed (such as during repairing damaged wiring).

• ELCB circuit breaker

• MCB circuit breaker

• Main switch

• Electric meter

Study the circuit diagram below. 
When the switch was closed, all the bulbs lighted up. Then, when one of the bulbs fused, all the bulbs went off. Which bulb was fused?

• A
• B
• C
• D