GETCO Exam Paper (22-07-2015) The RMS value of the voltage u(t) = 3 + 4 cos(3t) is 3 + 2(1.41) 5 4.12 7 3 + 2(1.41) 5 4.12 7 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) The insulation strength of an EHV transmission line is mainly governed by Load power factor Corona Switching over voltages Harmonics Load power factor Corona Switching over voltages Harmonics ANSWER DOWNLOAD EXAMIANS APP
GETCO Exam Paper (22-07-2015) What is the surge impedance loading of 400 kV line with surge impedance given as 160 Ω 400 MW 250 MW 1000 kW 1000 MW 400 MW 250 MW 1000 kW 1000 MW ANSWER EXPLANATION DOWNLOAD EXAMIANS APP SIL = (kV)²/Z₀
GETCO Exam Paper (22-07-2015) Hopkinson's test is the test to be carried out on two identical induction motors two identical DC motors induction motor with any DC motor induction motor with synchronous motor two identical induction motors two identical DC motors induction motor with any DC motor induction motor with synchronous motor ANSWER EXPLANATION DOWNLOAD EXAMIANS APP In hopkinson test known as regenerative testtwo identical machine coupledD.C shunt motorD.C shunt generatortemperature rise can be check under rated conditionlarge machine can be tested without drawing much power.
GETCO Exam Paper (22-07-2015) The PU impedance of a 1089 MVA, 33 kV generator is 1, the ohmic value of its impedance is: 0.5 10 1 100 0.5 10 1 100 ANSWER DOWNLOAD EXAMIANS APP
GETCO Exam Paper (22-07-2015) Which of the following is the wrong statement in terms of slack bus? it should be the largest generator bus in the system it should be located at the centre of the area voltage and angle is specified at this bus it has finite reactive power generation capability it should be the largest generator bus in the system it should be located at the centre of the area voltage and angle is specified at this bus it has finite reactive power generation capability ANSWER DOWNLOAD EXAMIANS APP
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