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) Which of the following is not function of substation batteries? operating automatic control circuits operating protective relay systems emergency lighting circuits provide supply to the excitation system operating automatic control circuits operating protective relay systems emergency lighting circuits provide supply to the excitation system ANSWER DOWNLOAD EXAMIANS APP
GETCO Exam Paper (22-07-2015) Select the wrong statement from the following in relation to power flow analysis Approximation is used in FDLF method Y Bus is required for power flow analysis No of ittretion in N R method can not be more than 30 for any system jacobian is always required Approximation is used in FDLF method Y Bus is required for power flow analysis No of ittretion in N R method can not be more than 30 for any system jacobian is always required ANSWER DOWNLOAD EXAMIANS APP
GETCO Exam Paper (22-07-2015) The RMS value of the voltage u(t) = 3 + 4 cos(3t) is 3 + 2(1.41) 7 4.12 5 3 + 2(1.41) 7 4.12 5 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP if voltage is given by,v(t) = V₀ + V₁ cos(3t) + V₂ cos(5t)+ …RMS value is given by,√( V₀² + (V₁/√2)² + (V₂/√2)² + …)
GETCO Exam Paper (22-07-2015) Which of the following is the wrong statement in terms of slack bus? voltage and angle is specified at this bus it should be the largest generator bus in the system it should be located at the centre of the area it has finite reactive power generation capability voltage and angle is specified at this bus it should be the largest generator bus in the system it should be located at the centre of the area it has finite reactive power generation capability ANSWER DOWNLOAD EXAMIANS APP
GETCO Exam Paper (22-07-2015) Earth wire on EHV overhead transmission line is provided to protect the line against switching surge corona effect lightning surge excessive fault voltages switching surge corona effect lightning surge excessive fault voltages ANSWER DOWNLOAD EXAMIANS APP
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