GETCO Exam Paper (22-07-2015) The value of holding ratio of relay is always Infinite zero less than 1 greater than 1 Infinite zero less than 1 greater than 1 ANSWER DOWNLOAD EXAMIANS APP
GETCO Exam Paper (22-07-2015) A transformer has negative voltage regulation when its load PF is lagging leading unity zero lagging leading unity zero 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) In synchronous motor, V-curve is a graph of Armature current Vs power factor Armature current Vs reactive power Armature current Vs Field current Armature current Vs active power Armature current Vs power factor Armature current Vs reactive power Armature current Vs Field current Armature current Vs active power ANSWER EXPLANATION DOWNLOAD EXAMIANS APP v curve: armature current → field currentInverted V curve: power factor → field current
GETCO Exam Paper (22-07-2015) To find the most accurate values of resistance and inductance of the transmission line Pi configuration is used End condenser configuration is used Distributed parameter configuration used T configuration is used Pi configuration is used End condenser configuration is used Distributed parameter configuration used T configuration is used ANSWER DOWNLOAD EXAMIANS APP
GETCO Exam Paper (22-07-2015) Switching surges are power frequency voltage high voltage Acs high votage DCs short duration transient voltage power frequency voltage high voltage Acs high votage DCs short duration transient voltage ANSWER DOWNLOAD EXAMIANS APP
GETCO Exam Paper (22-07-2015) The power factor of the arc in circuit breaker is always unity always zero always lagging always leading always unity always zero always lagging always leading ANSWER DOWNLOAD EXAMIANS APP
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