Electrical Machines Brushes are always placed on--------------- , in order to achieve sparkles commutation? GNA MNA None of these either GNA or MNA GNA MNA None of these either GNA or MNA ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines The direction of rotation of a 3 - Φ induction motor can be reversed by transposing any two leads from slip rings. transposing any two leads from supply. disconnecting any one phase. transposing all the three leads from the supply. transposing any two leads from slip rings. transposing any two leads from supply. disconnecting any one phase. transposing all the three leads from the supply. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Minimum allowable resistivity of power transformer insulating oil is generally taken as 2 X 1012 Ω - cm at 27°C and 0.2 X 1012 3 X 1012 Ω - cm at 27°C and 0.3 X 1012 4 X 1012 Ω - cm at 27°C and 0.4 X 1012 1 X 1012 Ω - cm at 27°C and 0.1 X 1012 2 X 1012 Ω - cm at 27°C and 0.2 X 1012 3 X 1012 Ω - cm at 27°C and 0.3 X 1012 4 X 1012 Ω - cm at 27°C and 0.4 X 1012 1 X 1012 Ω - cm at 27°C and 0.1 X 1012 ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines The application that need frequent starting and stopping is jaw crushers. paper mills. blowers. lifts and hoists. jaw crushers. paper mills. blowers. lifts and hoists. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines The sequence of induction motor is RYB, then the direction of induction motor can be changed by which of the following sequence? All of these BYR BRY RBY All of these BYR BRY RBY ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines A 220 V DC machine has an armature resistance 1 Ω. If the full load current is 20 A, the difference of induced voltage between generator and motor is 20 V. 40 V. 0 V. 60 V. 20 V. 40 V. 0 V. 60 V. ANSWER DOWNLOAD EXAMIANS APP
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