GETCO Exam Paper (22-07-2015) Calculate torque developed by the 3-phase, 5 HP, 4 pole induction motor runs at 1500 rpm 23.5 N-m 22 N-m 10 N-m 0 N-m 23.5 N-m 22 N-m 10 N-m 0 N-m ANSWER EXPLANATION DOWNLOAD EXAMIANS APP P = 2πTN/60 where N is speed in rpm
GETCO Exam Paper (22-07-2015) In synchronous motor, V-curve is a graph of Armature current Vs power factor Armature current Vs Field current Armature current Vs active power Armature current Vs reactive power Armature current Vs power factor Armature current Vs Field current Armature current Vs active power Armature current Vs reactive power ANSWER EXPLANATION DOWNLOAD EXAMIANS APP v curve: armature current → field currentInverted V curve: power factor → field current
GETCO Exam Paper (22-07-2015) The Y bus matrix is a sparse matrix because … Y primitive is a sparse matrix lines are connected to less no. of buses no of lines are less bus incidence matrix is a sparse matrix Y primitive is a sparse matrix lines are connected to less no. of buses no of lines are less bus incidence matrix is a sparse matrix ANSWER DOWNLOAD EXAMIANS APP
GETCO Exam Paper (22-07-2015) In G-S method of power flow problem, the number of iterations _____ depends on voltage control buses remains fixed depends on tolerance depends on no of buses depends on voltage control buses remains fixed depends on tolerance depends on no of buses ANSWER DOWNLOAD EXAMIANS APP
GETCO Exam Paper (22-07-2015) Root Locus is locus of the _____ close loop poles to close loop zeros open loop poles to open loop zeros open loop zeros to close poles close loop poles close loop poles to close loop zeros open loop poles to open loop zeros open loop zeros to close poles close loop poles ANSWER DOWNLOAD EXAMIANS APP
GETCO Exam Paper (22-07-2015) Which of the following is a reason to decouple AVR and LFC loops when there is a shortage of reactive power? deference of error is the main reason angle of the voltage is not considered AVR loop response is slower than LFC loop Change in voltage magnitude marginally affects real power deference of error is the main reason angle of the voltage is not considered AVR loop response is slower than LFC loop Change in voltage magnitude marginally affects real power ANSWER DOWNLOAD EXAMIANS APP
EXAMIANS