INVERTER AND UPS - Quiz

1) How the backup time of UPS can be increased?

Increase the VA rating of UPS Increase the AH capacity of battery Decrease the AH capacity of battery Maintain battery terminal voltage always 90% of rating

2) How the hard sulphation defect in secondary cell can be prevented?

Provide trickle charging Provide freshening charge Provide constant current charging Provide constant potential method charging

3) Which part in UPS supplies continuous output voltage in case of input voltage failure?

Battery unit Inverter unit Rectifier unit Controller unit

4) What is the effect during loading of the cell, the current strength falls and become zero?

Buckling Polarization Local action Amalgamation

5) What is the reason for having low back up time in UPS?

Fault in inverter circuit Battery is short circuited Mains earthing is not proper Ampere hour (A.H) capacity of battery is not sufficient