GETCO Exam Paper (22-07-2015) Current chopping phenomenon is related to capacitance switching resistance switching asymmetrical current small inductive current capacitance switching resistance switching asymmetrical current small inductive current ANSWER DOWNLOAD EXAMIANS APP
GETCO Exam Paper (22-07-2015) For a given transformer volte/turn for primary and secondary winding is depends on transformer design same different depends on load depends on transformer design same different depends on load ANSWER EXPLANATION DOWNLOAD EXAMIANS APP emf = 4.44*f*φ*Temf/T = 4.44*f*φ
GETCO Exam Paper (22-07-2015) A transformer has negative voltage regulation when its load PF is leading zero lagging unity leading zero lagging unity 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) Which of the following is a reason to decouple AVR and LFC loops when there is a shortage of reactive power? angle of the voltage is not considered AVR loop response is slower than LFC loop Change in voltage magnitude marginally affects real power deference of error is the main reason angle of the voltage is not considered AVR loop response is slower than LFC loop Change in voltage magnitude marginally affects real power deference of error is the main reason ANSWER DOWNLOAD EXAMIANS APP
GETCO Exam Paper (22-07-2015) The mechanical angle is _____ electrical angle same lesser than or equal to always less greater than or equal to same lesser than or equal to always less greater than or equal to ANSWER EXPLANATION DOWNLOAD EXAMIANS APP Electrical angle = (P/2)*mechanicla angle
GETCO Exam Paper (22-07-2015) An over-current relay of current rating 5 A and setting 150% is connected to a 200/5 A CT. Then the relay to pickup, the line current required is 100 200 300 150 100 200 300 150 ANSWER DOWNLOAD EXAMIANS APP
EXAMIANS