1.

Why is the dew point of nitrogen in a transformer less than ?50 C?

2.

How would electrical faults occur?

3.

Why would the forces between the windings increase during a short circuit?

4.

How would a transformer fail?

5.

What is the upper moisture limit that should be specified when selecting a transformer?

6.

What are the most important tests for oil in a transformer?

7.

When would preventive maintenance be required for oil in a transformer?

8.

What are the methods of dealing with bad oil in a transformer?

9.

What are the causes of gas formation in the oil of a transformer?

10.

What is the purpose of the gas detector relay?

11.

How does the gas relay operate?

12.

What is the purpose of the unit service transformer (UST)?

13.

What is the purpose of the station service transformer (SST)?

14.

Why are half the auxiliary loads inside some power plants supplied through the SST and the remaining half through the UST?

15.

How would the unit auxiliary loads be affected if the power supply through the SST and the UST were impaired?

16.

Would the breaker connecting the power plant to the grid open immediately following a turbine trip?

17.

Would the breaker connecting the power plant to the grid open if the grid voltage drops below its normal value?

18.