GETCO Exam Paper (22-07-2015) In case of HVDC transmission there is _____ no charging current but skin effect no charging current no skin effect both charging effect and skin effect charging current but no skin effect no charging current but skin effect no charging current no skin effect both charging effect and skin effect charging current but no skin effect ANSWER DOWNLOAD EXAMIANS APP
GETCO Exam Paper (22-07-2015) Hopkinson's test is the test to be carried out on induction motor with any DC motor induction motor with synchronous motor two identical DC motors two identical induction motors induction motor with any DC motor induction motor with synchronous motor two identical DC motors two identical induction motors ANSWER EXPLANATION DOWNLOAD EXAMIANS APP In hopkinson test known as regenerative testtwo identical machine coupledD.C shunt motorD.C shunt generatortemperature rise can be check under rated conditionlarge machine can be tested without drawing much power.
GETCO Exam Paper (22-07-2015) Two watt meter method for 3 phase circuit is preferred over other methods because it can be used for balanced or unbalanced load it can be used for star or delta connected load PF of the load can also be estimated all are correct it can be used for balanced or unbalanced load it can be used for star or delta connected load PF of the load can also be estimated all are correct ANSWER DOWNLOAD EXAMIANS APP
GETCO Exam Paper (22-07-2015) For eliminating 7th harmonics from generated EMF in alternator the fractional pitch must be 5\6 2\3 7\8 6\7 5\6 2\3 7\8 6\7 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP fractional pitch = Cos( α/2)α is obtain from: (nα/2)=90˚ where n is harmonicα=25.7143˚fractional pitch=6/7
GETCO Exam Paper (22-07-2015) The magnitude of sum of two sinusoidal AC voltages is equal to the magnitude of each individual voltage, What must be the phase difference between voltages? 180 120 60 90 180 120 60 90 ANSWER DOWNLOAD EXAMIANS APP
GETCO Exam Paper (22-07-2015) For selecting low voltage cable which of the following factors is not important? voltage grade current carrying capacity permissible voltage drop short circuit current rating voltage grade current carrying capacity permissible voltage drop short circuit current rating ANSWER DOWNLOAD EXAMIANS APP