Hamad Transformers 14/12/2021 A. 180° B. 120″ C. 90° D. 75° Related Mcqs: No-load current in a transformer________________?A. lags behind the voltage by about 75° B. leads the voltage by about 75° C. lags behind the voltage by about 15° D. leads the voltage by about 15°... A common method of cooling a power transformer is_______________?A. natural air cooling B. air blast cooling C. oil cooling D. any of the above... The chemical used in breather for transformer should have the quality of____________?A. ionizing air B. absorbing moisture C. cleansing the transformer oil D. cooling the transformer oil... Which of the following is not a routine test on transformers ?A. Core insulation voltage test B. Impedance test C. Radio interference test D. Polarity test... In a step-down transformer, there is a change of 15 A in the load current. This results in change of supply current of_________________?A. less than 15 A B. more than 15 A C. 15 A D. none of the above...
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