A transformer has reactance 0.25 pu given on a 230 kV, 75 MVA base. The reactance on a 345 kV, 100 MVA base is ( )。
A. 0.15 pu.
B. 0.20 pu.
C. 0.12 pu.
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Which answer only lists renewable energy sources?( )
A. Wind, Solar, Hydro
B. Solar, Coal, Wave
Coal, Wind, Solar
D. Hydro, Nuclear, Tidal
Which tests are used to find the parameters of an INDUCTION MACHINE?( )
A. No load test, blocked rotor test
B. Open-circuit test, short circuit test
C. No load test, short circuit test
Calculate the turns ratio for a 200 MVA, 20/220 kV transformer.( )
A. 0.20
B. 0.15
C. 0.12
D. 0.09
Which of the following faults is an SYMMETRICAL or BALANCED fault? ( )
A. Phase to ground
B. Three phase to ground
C. Phase to phase
Double phase to ground
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