Electrical Machines The armature voltage control is considered suitable for a DC motor driven at constant power. current. torque. speed. power. current. torque. speed. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines A DC series motor is running with a divertor connected across its field winding. If the divertor resistance is reduced then the speed of the motor will become execessively high. decrease. remain unaltered. increase. become execessively high. decrease. remain unaltered. increase. 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. synchronizing power co efficient. damping torque. mechanical rotatory system. restoring torque. synchronizing power co efficient. damping torque. mechanical rotatory system. restoring torque. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines The voltage regulation of a DC generator at full load being zero implies that the generator is deferentially compounded. cumulatively compounded. series connected. shunt connected. deferentially compounded. cumulatively compounded. series connected. shunt connected. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Which type of bearing is provided in small induction motors to support the rotor shaft? Bush bearings. None of these Ball bearings. Cast iron bearings. Bush bearings. None of these Ball bearings. Cast iron bearings. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Under which of the following conditions is a dc motor provided with compensating winding used ? 1. Wide range of speed control above normal 2. Wide range of steady load variation with no speed control 3.Wide range of rapid variation in load Select the correct answer using the codes given below : Codes : 1 and 3 1, 2 and 3 2 and 3 1 and 2 1 and 3 1, 2 and 3 2 and 3 1 and 2 ANSWER DOWNLOAD EXAMIANS APP
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