Answer Posted / s kumar

If 6 Kva UPS given 20 min. backup at 100%load
backup at (50%)100/2------20*2=40min
backup at (25%)100/4------20*4=80min

Then 80 min. Backup at 25 %load

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Sir,I am going to sit for IOCL written test exam. recently.Can anyone tell me the name of 'Objective type Question Book on Instrumentation Engineering ' which will help me. Pl. mail to bidyut_71@rediffmail.com / bidyut.saha2008@indiatimes.com / bidyut.saha09@yahoo.in

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