GETCO Exam Paper (22-07-2015) A transformer has negative voltage regulation when its load PF is unity leading lagging zero unity leading lagging 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) The Z matrix of 2 port network is given by [0.9 0.2 : 0.2 0.6]. The element Y22 of the corresponding Y matrix of the same network is given by -0.4 1.2 1.8 0.4 -0.4 1.2 1.8 0.4 ANSWER DOWNLOAD EXAMIANS APP
GETCO Exam Paper (22-07-2015) Which of the following breaking method save energy? resistor breaking plugging dynamic breaking regenerative breaking resistor breaking plugging 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) In case of a balanced three phase sinusoidal AC supply, because of the phase difference rotating magnetic field is produced neutral current is high if load is not balanced all are correct neutral wire is not required, if load is balanced rotating magnetic field is produced neutral current is high if load is not balanced all are correct neutral wire is not required, if load is balanced ANSWER DOWNLOAD EXAMIANS APP
GETCO Exam Paper (22-07-2015) Speed of induction motor at rated torque is _____ than at maximum torque. depends on load same lesser greater depends on load same lesser greater ANSWER DOWNLOAD EXAMIANS APP
GETCO Exam Paper (22-07-2015) Which of the following award was not awarded to late Dr. Abdul Kalam? Padma Vibhushan Veer Chakra Bharat Ratna Padma Bhusan Padma Vibhushan Veer Chakra Bharat Ratna Padma Bhusan ANSWER DOWNLOAD EXAMIANS APP
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