GETCO Exam Paper (22-07-2015) Which of the following breaking method save energy? plugging resistor breaking dynamic breaking regenerative breaking plugging resistor breaking dynamic breaking 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) For a given transformer volte/turn for primary and secondary winding is different depends on transformer design same depends on load different depends on transformer design same 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) Merz-Price protection is employed for protection of alternators circuit breaker motor transmission lines alternators circuit breaker motor transmission lines ANSWER DOWNLOAD EXAMIANS APP
GETCO Exam Paper (22-07-2015) The area under the load duration curve represents Maximum demand of the power station average load of the system energy generated in the period considered base load of the system Maximum demand of the power station average load of the system energy generated in the period considered base load of the system ANSWER DOWNLOAD EXAMIANS APP
GETCO Exam Paper (22-07-2015) A transformer has negative voltage regulation when its load PF is unity lagging leading zero unity lagging leading zero 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) Fast excitation system of the generator will _____ Improve the dynamic stability Improve the reactive power control Improve the power factor Improve the voltage control Improve the dynamic stability Improve the reactive power control Improve the power factor Improve the voltage control ANSWER DOWNLOAD EXAMIANS APP
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