Electrical Machines If residual magnetism of a shunt generator is destroyed accidentally it may be restored by connecting its shunt field to an AC source. to a DC source. in reverse. to earth. to an AC source. to a DC source. in reverse. to earth. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines The commutator segments of DC machines are made up of brass hard-drawn copper copper alloy copper brass hard-drawn copper copper alloy copper ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In DC generators, the cause of rapid brush wear may be imperfect contact. severe sparking. rough commutator surface. any of above. imperfect contact. severe sparking. rough commutator surface. any of above. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In Ward-Leonard system, the lower limit of the speed imposed by Armature resistance. Residual magnetism of the generator. Field resistance. None of above. Armature resistance. Residual magnetism of the generator. Field resistance. None of above. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Example of double excited machine is Both are correct. None of these DC Shunt Motor Synchronous motor. Both are correct. None of these DC Shunt Motor Synchronous motor. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Two DC series motors are connected in series and are driving the same mechanical load. If the motors are now connected in parallel the speed will become one fourth. half. double. 4 times. one fourth. half. double. 4 times. ANSWER DOWNLOAD EXAMIANS APP
EXAMIANS