GETCO Exam Paper (22-07-2015) A transformer has negative voltage regulation when its load PF is zero unity lagging leading zero unity lagging leading 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 sub stations for making and breaking of load current load interrupter switches are used circuit breakers are used isolators are used relays are used load interrupter switches are used circuit breakers are used isolators are used relays are used ANSWER DOWNLOAD EXAMIANS APP
GETCO Exam Paper (22-07-2015) Two heaters rated at 500 W, 250 V each are conneted in series across a 250 V, 50 Hz mains. The total power drawn from the supply would be _____ watt. 250 500 125 1000 250 500 125 1000 ANSWER DOWNLOAD EXAMIANS APP
GETCO Exam Paper (22-07-2015) In the standard B-H curve X axis and Y axis intercepts respctively represents Hysteresis loss and Flux residual magnetism and coercive force Flux and MMF coercive force and residual magnetism Hysteresis loss and Flux residual magnetism and coercive force Flux and MMF coercive force and residual magnetism ANSWER DOWNLOAD EXAMIANS APP
GETCO Exam Paper (22-07-2015) In a given current transformer, If permissible current ratio error rated primary current is 5% the CT is suitable for as power transformer both measuring and protection protection purpose measuring purpose as power transformer both measuring and protection protection purpose measuring purpose 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 bus bar circuit breaker CTs and PTs transformer bus bar circuit breaker CTs and PTs transformer ANSWER DOWNLOAD EXAMIANS APP
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