Electrical Machines The wound rotor type IM is used for____________ speed operation. constant. maximum. minimum. variable. constant. maximum. minimum. variable. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Oil is provided in an oil filled transformer for lubrication. insulating. both cooling and insulation. cooling. lubrication. insulating. both cooling and insulation. cooling. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines A transformer has hysteresis loss of 30 W, at 240 V, 60 Hz. The hysteresis loss at 200 V, 50 Hz will be 30 W. 25 W. 28 W. 36 W. 30 W. 25 W. 28 W. 36 W. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines A bipolar dc machine with interpoles has a main-pole flux of ф per pole and an interpole flux of Фᵢ per pole. The yoke of the machine is devide into four quadrants by the main-pole axis and The commutation axis. The flux-distribution in the quadrants will be ½ ( ф - фᵢ ) in all the four quadrants ½ ( ф + фᵢ ) in all the four quadrants ½ ( ф + фᵢ ) in two diametrically opposite quadrants and ½ ( ф - фᵢ ) in the remaining two Quadrants ½ ( ф + фᵢ ) in two adjacent quadrants and ½ ( ф - фᵢ ) in the remaining two quadrants ½ ( ф - фᵢ ) in all the four quadrants ½ ( ф + фᵢ ) in all the four quadrants ½ ( ф + фᵢ ) in two diametrically opposite quadrants and ½ ( ф - фᵢ ) in the remaining two Quadrants ½ ( ф + фᵢ ) in two adjacent quadrants and ½ ( ф - фᵢ ) in the remaining two quadrants 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. mechanical rotatory system. damping torque. synchronizing power co efficient. restoring torque. mechanical rotatory system. damping torque. synchronizing power co efficient. restoring torque. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Maximum power developed in a cylindrical synchronous machine depends on synchronous reactance both 1and 2 load angle excitation synchronous reactance both 1and 2 load angle excitation ANSWER DOWNLOAD EXAMIANS APP
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