Electrical Machines Which of the following transformer insulating oil generally used in India? Paraffin based insulating oil. Naphtha based insulating oil. Olefin based insulating oil. Aromatics based insulating oil. Paraffin based insulating oil. Naphtha based insulating oil. Olefin based insulating oil. Aromatics based insulating oil. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Which of the following are variable losses? shunt field copper loss armature copper loss hysteresis loss eddy current loss shunt field copper loss armature copper loss hysteresis loss eddy current loss ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Which of the following DC Motor uses 4-point starter? DC shunt motor with field weaking control. DC shunt motor with armature resistance. DC compound motor. DC series motor. DC shunt motor with field weaking control. DC shunt motor with armature resistance. DC compound motor. DC series motor. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Addition of 0.3 % to 4.5 % silicon to iron increases the electrical resistivity of iron. reduces the saturation magnetization. increases the hysteresis loss. None of these increases the electrical resistivity of iron. reduces the saturation magnetization. increases the hysteresis loss. None of these ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Consider the following statements : 1. interpole windings are connected in series with armature windings 2. polarity of interpoles must be the same as that of the main poles in advance 3. distortion of the main field under the pole shoes is not affected by the use of interpoles From above, the correct answer is 1 and 2 1 and 3 2 and 3 1 alone 1 and 2 1 and 3 2 and 3 1 alone ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Which machine is used for battery charging? Compounded DC generator. None of these. DC shunt generator. DC series generator. Compounded DC generator. None of these. DC shunt generator. DC series generator. ANSWER DOWNLOAD EXAMIANS APP
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