GETCO Exam Paper (22-07-2015) A transformer has negative voltage regulation when its load PF is zero unity leading lagging zero unity leading lagging ANSWER EXPLANATION DOWNLOAD EXAMIANS APP Voltage regulation = ((no load voltage)-(full load voltage)/(no load voltage))VR at leading PF = ((I*R*cosφ)-(I*X*sinφ))/VVR at lagging PF = ((I*R*cosφ)+(I*X*sinφ))/V
GETCO Exam Paper (22-07-2015) Critical clearing time of a fault in a power system is related to Short circuit limit Reactive power limit Steady state limit Transient stability limit Short circuit limit Reactive power limit Steady state limit Transient stability limit ANSWER DOWNLOAD EXAMIANS APP
GETCO Exam Paper (22-07-2015) Who is the 2012 London Olympics bronze medalist in badminton? Sania Saina Jwala Gutta Ashwini Ponnappa Sania Saina Jwala Gutta Ashwini Ponnappa ANSWER DOWNLOAD EXAMIANS APP
GETCO Exam Paper (22-07-2015) The rating of given on the name plate of a transformer indicates the: Apparent power which it draws from the supply mains True power whichh it draws from the supply mains True power which it can supply Apparent power which it can supply Apparent power which it draws from the supply mains True power whichh it draws from the supply mains True power which it can supply Apparent power which it can supply ANSWER EXPLANATION DOWNLOAD EXAMIANS APP The rating of given on the name plate of a transformer indicates the:Apparent power which it can supply S=V( supplied voltage)*I (load current)active power = v* i*cosφreactive power = v* i*sinφ
GETCO Exam Paper (22-07-2015) Normally the angle of the transmission line is kept _____ because of _____ reasons 90, transient stability 45, steady state stability 90, steady state stability 45, transient stability 90, transient stability 45, steady state stability 90, steady state stability 45, transient stability ANSWER DOWNLOAD EXAMIANS APP
GETCO Exam Paper (22-07-2015) During the insulation co-ordination in the sub station, the lowest insulation strength is at CTs and PTs circuit breaker bus bar transformer CTs and PTs circuit breaker bus bar transformer ANSWER DOWNLOAD EXAMIANS APP
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