GETCO Exam Paper (30-11-2008) In the parallel operation of transformers, which statement is false transformers kVA ratings equal transformers transformation ratios same None of these transformers voltage ratings same transformers kVA ratings equal transformers transformation ratios same None of these transformers voltage ratings same ANSWER DOWNLOAD EXAMIANS APP
GETCO Exam Paper (30-11-2008) When a star delta transformer bank of three single phase transformers is to be used for step down transformation with line voltages of 23000 V and 2300 V, the ratio of transformation will be 12.1:1 5.8:1 10.0:1 17.2:1 12.1:1 5.8:1 10.0:1 17.2:1 ANSWER DOWNLOAD EXAMIANS APP
GETCO Exam Paper (30-11-2008) Interconnected power systems operating with "tie line bias" will respond to both frequency and tie line load changes tie line load changes only frequency changes only tie line voltage changes only both frequency and tie line load changes tie line load changes only frequency changes only tie line voltage changes only ANSWER DOWNLOAD EXAMIANS APP
GETCO Exam Paper (30-11-2008) The recovery voltage will be maximum for p.f. of 0.5 0.707 unity zero 0.5 0.707 unity zero ANSWER DOWNLOAD EXAMIANS APP
GETCO Exam Paper (30-11-2008) The power handling capabilities of transmission lines are controlled by load frequency control equipments determined by system operators set by design factors both (a) & (c ) controlled by load frequency control equipments determined by system operators set by design factors both (a) & (c ) ANSWER DOWNLOAD EXAMIANS APP
GETCO Exam Paper (30-11-2008) In a transformer it is difficult to measure the efficiency by output-input measurement methods because the output is sinusoidal and hence cannot be measured efficiency of transformer is usually high and hence extremely accurate measurements will be necessary losses are abnormally high output is out of phase with respect to input the output is sinusoidal and hence cannot be measured efficiency of transformer is usually high and hence extremely accurate measurements will be necessary losses are abnormally high output is out of phase with respect to input ANSWER DOWNLOAD EXAMIANS APP
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