Electrical Machines Motors for fans and pumps are selected in the rpm range 1440 to 2880. 375 to 500. 500 to 720. 720 to 920. 1440 to 2880. 375 to 500. 500 to 720. 720 to 920. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines The teeth in the armature of a DC machines are sometimes skewed. This is done to reduce vibrations. eddy electric current loss. copper loss. hysteresis loss. vibrations. eddy electric current loss. copper loss. hysteresis loss. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines A 4 pole lap wound dc generator has 4 brushes, if one of the brush is damaged, what will be the change in V, I and P ratings V/2, I/2 and P/4 V, I and P V/2, I and P/2 V, I/2 and P/2 V/2, I/2 and P/4 V, I and P V/2, I and P/2 V, I/2 and P/2 ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines The armature shaft must be able to with stand Bending moment due to weight of the armature. Twisting stains due to transmission of torque. All of these Any unbalanced magnetic pull on the armature core. Bending moment due to weight of the armature. Twisting stains due to transmission of torque. All of these Any unbalanced magnetic pull on the armature core. 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. 4 times. double. one fourth. half. 4 times. double. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines If an additional resistance is connected in series with a DC series motor operating at rated speed, the speed of the motor will Oscillate around the normal speed. Reduce. Increase. Remain unaltered. Oscillate around the normal speed. Reduce. Increase. Remain unaltered. ANSWER DOWNLOAD EXAMIANS APP
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