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Transformers (LADWP) Questions with Verified Answers

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What is a transformer? - ANSWERSA device used to increase or decrease the voltage in electrical circuits. What are transformers used for? And explain the process. - ANSWERSThey are used to increase or decrease the voltage in electrical circuits. First lower the current passing through transmission lines by increasing the voltage and then decreasing the voltage coming to the city, into homes and factories. What are the components of a transformer? - ANSWERSIron Core, Windings, Bushings, Radiators, Temperature Sensors, Oil gauge. What is a Step-Up Transformer? - ANSWERSIt increase the voltage and decrease the current. It is used to reduce the line losses. By increasing the voltage, the line current proportionally decreases and power loss from cable resistance is reduced. What is a Step-Down Transformer? - ANSWERSIt decreases the voltage to go into homes and increases the current. Where does a Step-Up Transformer have more coil? - ANSWERSThe secondary coil Where does a Step-Down Transformer have more coil? - ANSWERSThe primary coil What are some applications of a Step-Down Transformer? - ANSWERSAdapters, cell phone chargers, transmission lines, welding machines, TVs, inverters Advantages of Step-Down Transformer? - ANSWERSMakes transmission power easier and cheaper, 99% efficiency, low cost, high reliability, high durability, provides varied voltage requirements. Disadvantages of Step-Down Transformer? - ANSWERSRequires a lot of maintenance, volatility in feedstock costs, fault rectification takes more time

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Transformers (LADWP) Questions
with Verified Answers
What is a transformer? - ANSWERSA device used to increase or decrease the voltage
in electrical circuits.


What are transformers used for? And explain the process. - ANSWERSThey are used
to increase or decrease the voltage in electrical circuits. First lower the current passing
through transmission lines by increasing the voltage and then decreasing the voltage
coming to the city, into homes and factories.

What are the components of a transformer? - ANSWERSIron Core, Windings,
Bushings, Radiators, Temperature Sensors, Oil gauge.

What is a Step-Up Transformer? - ANSWERSIt increase the voltage and decrease the
current. It is used to reduce the line losses. By increasing the voltage, the line current
proportionally decreases and power loss from cable resistance is reduced.

What is a Step-Down Transformer? - ANSWERSIt decreases the voltage to go into
homes and increases the current.

Where does a Step-Up Transformer have more coil? - ANSWERSThe secondary coil

Where does a Step-Down Transformer have more coil? - ANSWERSThe primary coil

What are some applications of a Step-Down Transformer? - ANSWERSAdapters, cell
phone chargers, transmission lines, welding machines, TVs, inverters

Advantages of Step-Down Transformer? - ANSWERSMakes transmission power easier
and cheaper, 99% efficiency, low cost, high reliability, high durability, provides varied
voltage requirements.

Disadvantages of Step-Down Transformer? - ANSWERSRequires a lot of maintenance,
volatility in feedstock costs, fault rectification takes more time

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