GETCO Exam Paper (22-07-2015) Which of the following breaking method save energy? resistor breaking dynamic breaking plugging regenerative breaking resistor breaking dynamic breaking plugging regenerative breaking ANSWER EXPLANATION DOWNLOAD EXAMIANS APP three types of electric breaking:Regenerative breaking( leads to economic and energy consevation)pugging (more efficient method of breaking)rheostatic breaking
GETCO Exam Paper (22-07-2015) Switching surges are high voltage Acs power frequency voltage short duration transient voltage high votage DCs high voltage Acs power frequency voltage short duration transient voltage high votage DCs ANSWER DOWNLOAD EXAMIANS APP
GETCO Exam Paper (22-07-2015) The breaking capacity of a CB is usually expressed interms of volts MW MVA amperes volts MW MVA amperes ANSWER DOWNLOAD EXAMIANS APP
GETCO Exam Paper (22-07-2015) Which of the following cable is extensively used for high tension and low tension work? VIR cable TRS cable PVC cable XLPE cable VIR cable TRS cable PVC cable XLPE cable ANSWER DOWNLOAD EXAMIANS APP
GETCO Exam Paper (22-07-2015) The PU impedance of a 1089 MVA, 33 kV generator is 1, the ohmic value of its impedance is: 100 10 1 0.5 100 10 1 0.5 ANSWER DOWNLOAD EXAMIANS APP
GETCO Exam Paper (22-07-2015) A transformer has negative voltage regulation when its load PF is leading zero unity lagging leading zero unity lagging 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
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