Electrical Machines which of the following type of brush and their application is/are correct All of these carbon brush → normal ratings electro graphite → large ratings copper graphite → low voltage high current density All of these carbon brush → normal ratings electro graphite → large ratings copper graphite → low voltage high current density ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Which one of the following statement is correct ? In an induction motor if the air gap is increased then its power factor will reduce its speed will increase its speed will reduce its efficiency will improve its power factor will reduce its speed will increase its speed will reduce its efficiency will improve ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines The noise resulting from vibrations of lamination set by magnetic forces, is termed as zoom. magnetostriction. boo. hum. zoom. magnetostriction. boo. hum. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Which of the following motors has negative speed regulation? Differential compound motors. Shunt motors. Series motors. Both B and C. Differential compound motors. Shunt motors. Series motors. Both B and C. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In synchronous generator a synchronous dead load (lamp, furnaces etc) has no ____________ hence it has no natural frequency of oscillation. damping torque. synchronizing power co efficient. mechanical rotatory system. restoring torque. damping torque. synchronizing power co efficient. mechanical rotatory system. restoring torque. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In a synchronous motor torque or load angle δ ------------- with increase in load increases None of these remains unaffected decreases increases None of these remains unaffected decreases ANSWER DOWNLOAD EXAMIANS APP
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