GETCO Exam Paper (22-07-2015) In case of a balanced three phase sinusoidal AC supply, because of the phase difference rotating magnetic field is produced neutral wire is not required, if load is balanced all are correct neutral current is high if load is not balanced rotating magnetic field is produced neutral wire is not required, if load is balanced all are correct neutral current is high if load is not balanced ANSWER DOWNLOAD EXAMIANS APP
GETCO Exam Paper (22-07-2015) The fault occurring in transmission actually are mostly L-L-G L-L-L L-L L-G L-L-G L-L-L L-L L-G ANSWER DOWNLOAD EXAMIANS APP
GETCO Exam Paper (22-07-2015) Select the wrong statement from the following in relation to power flow analysis Y Bus is required for power flow analysis jacobian is always required No of ittretion in N R method can not be more than 30 for any system Approximation is used in FDLF method Y Bus is required for power flow analysis jacobian is always required No of ittretion in N R method can not be more than 30 for any system Approximation is used in FDLF method ANSWER DOWNLOAD EXAMIANS APP
GETCO Exam Paper (22-07-2015) Two watt meter method for 3 phase circuit is preferred over other methods because all are correct PF of the load can also be estimated it can be used for balanced or unbalanced load it can be used for star or delta connected load all are correct PF of the load can also be estimated it can be used for balanced or unbalanced load it can be used for star or delta connected load ANSWER DOWNLOAD EXAMIANS APP
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 case of HVDC transmission there is _____ both charging effect and skin effect no charging current but skin effect no charging current no skin effect charging current but no skin effect both charging effect and skin effect no charging current but skin effect no charging current no skin effect charging current but no skin effect ANSWER DOWNLOAD EXAMIANS APP
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