GETCO Exam Paper (22-07-2015) Fast excitation system of the generator will _____ Improve the reactive power control Improve the voltage control Improve the dynamic stability Improve the power factor Improve the reactive power control Improve the voltage control Improve the dynamic stability Improve the power factor ANSWER DOWNLOAD EXAMIANS APP
GETCO Exam Paper (22-07-2015) In synchronous motor, V-curve is a graph of Armature current Vs Field current Armature current Vs reactive power Armature current Vs active power Armature current Vs power factor Armature current Vs Field current Armature current Vs reactive power Armature current Vs active power Armature current Vs power factor ANSWER EXPLANATION DOWNLOAD EXAMIANS APP v curve: armature current → field currentInverted V curve: power factor → field current
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) In rotating electrical machines, the insulation temperature limit for class B type is 105˚C 150˚C 180˚C 130˚C 105˚C 150˚C 180˚C 130˚C ANSWER EXPLANATION DOWNLOAD EXAMIANS APP insulation Class and temperature limit(in ˚C) is given below:Y - 90A- 105E- 120B-130F-155H-180C- above 180
GETCO Exam Paper (22-07-2015) Which of the following is the most likely reason for large overshoot in a control system? high positive correcting torque high retarding torque High gain in a system presence of dead time delay high positive correcting torque high retarding torque High gain in a system presence of dead time delay ANSWER DOWNLOAD EXAMIANS APP
GETCO Exam Paper (22-07-2015) Normally the angle of the transmission line is kept _____ because of _____ reasons 45, steady state stability 45, transient stability 90, steady state stability 90, transient stability 45, steady state stability 45, transient stability 90, steady state stability 90, transient stability ANSWER DOWNLOAD EXAMIANS APP
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