Electrical Machines If the load current and the flux of a DC motor are held constant and voltage applied across its armature is increased by 5%, the speed of the motor will reduce by 5 %. increase by 5 %. depend on other factors. remain unchanged. reduce by 5 %. increase by 5 %. depend on other factors. remain unchanged. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Transformer action requires a increasing magnetic flux. constant magnetic flux. alternating electric flux. alternating magnetic lux. increasing magnetic flux. constant magnetic flux. alternating electric flux. alternating magnetic lux. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines The armature MMF waveform of a DC machine is rectangular. pulsating. triangular. sinusoidal. rectangular. pulsating. triangular. sinusoidal. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Winding conductors of an electrical power transformer are mainly insulated by rubber insulation. cotton insulation. paper insulation. wooden insulation. rubber insulation. cotton insulation. paper insulation. wooden insulation. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In travelling cranes for crane travel, trolley and boom hoist which motor is preferred? Stepper motor. Synchronous motor. DC differential compound motor. Slip ring induction motor. Stepper motor. Synchronous motor. DC differential compound motor. Slip ring induction motor. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines A dc shunt generator, when commissioned after a major repair of the field system, failed to build Up voltage. It was because field resistance was higher than critical resistance there was a break in the armature circuit field system lost residual magnetism field winding was wrongly connected field resistance was higher than critical resistance there was a break in the armature circuit field system lost residual magnetism field winding was wrongly connected ANSWER DOWNLOAD EXAMIANS APP
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