INVERTER AND UPS - Practice Mode

1) What is the advantage of on-line UPS over offline UPS?

Supplies constant power output It gives constant output frequency Works on single phase or three phase supply Free from change over and transition problems

Correct Answer: Free from change over and transition problems

2) Which electronic circuit is used in a automatic voltage stabilizer to produce constant output voltage?

Rectifier circuit Amplifier circuit Oscillator circuit Feedback circuit

Correct Answer: Feedback circuit

3) Which feedback network is used for automatic voltage stabilizer?

Current divider network Voltage divider network Tapped transformer network Resistance temperature detector network

Correct Answer: Voltage divider network

4) Which electrical device is actuating the voltages in a stepped voltage stabilizer?

Autostat Output transformer Over voltage relay Under voltage relay

Correct Answer: Autostat

5) What is the effect in internal resistance of a discharged cell?

Increase Decrease Becomes zero Remain same

Correct Answer: Increase

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