GETCO Exam Paper (22-07-2015) Shunt compensation in EHV line is resorted to Reduce the fault level Improve voltage profile Improve the stability Increase line impedance Reduce the fault level Improve voltage profile Improve the stability Increase line impedance ANSWER DOWNLOAD EXAMIANS APP
GETCO Exam Paper (22-07-2015) Current chopping phenomenon is related to capacitance switching small inductive current resistance switching asymmetrical current capacitance switching small inductive current resistance switching asymmetrical current ANSWER DOWNLOAD EXAMIANS APP
GETCO Exam Paper (22-07-2015) Light from the nearest star (other than the sun) reaches the earth in 42 secs 4.2 hours 4.2 minutes 4.2 years 42 secs 4.2 hours 4.2 minutes 4.2 years ANSWER DOWNLOAD EXAMIANS APP
GETCO Exam Paper (22-07-2015) Stray loss is equal to _____ frictional loss & copper loss mechanical loss & iron loss copper loss and iron loss field copper loss & iron loss frictional loss & copper loss mechanical loss & iron loss copper loss and iron loss field copper loss & iron loss ANSWER EXPLANATION DOWNLOAD EXAMIANS APP Answer in official key is “mechanical loss & iron loss ”.Many times stray loss is also considered as total loss actually accured minus calculatable loss. This means loss that can be calculated is known as stray loss.
GETCO Exam Paper (22-07-2015) A transformer has negative voltage regulation when its load PF is lagging unity zero leading lagging unity zero 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) 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 deference of error is the main reason Change in voltage magnitude marginally affects real power AVR loop response is slower than LFC loop angle of the voltage is not considered deference of error is the main reason Change in voltage magnitude marginally affects real power AVR loop response is slower than LFC loop ANSWER DOWNLOAD EXAMIANS APP
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