GENERATION AND TRANSMISSION - Practice Mode

1) Which condition is to be satisfied before connecting two single phase transformer in parallel?

Phase sequence must be same Type must be same Polarity must be same Capacity must be same

Correct Answer: Polarity must be same

2) Which is the application of scott connection?

Transform 3 phase to 2 phase To stabilize the output voltage To get rated power output Transform 3 phase to 6 phase

Correct Answer: Transform 3 phase to 2 phase

3) Which type of cooling is employed for distribution transformer upto 100 KVA?

Natural air method Oil blast method Air blast method Forced circulation of oil

Correct Answer: Natural air method

4) Which is the purpose of cooling of transformer?

To improve the efficiency To protect the winding from damage To regulate the voltage To increase the life of transformer oil

Correct Answer: To protect the winding from damage

5) Which method of cooling the fans are used to blow air on the surface of transformer?

Forced oil and water cooled Air blast method Oil and water cooled method Oil blast method

Correct Answer: Air blast method

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