DC Motors The speed of a dc motor can be controlled by changing Armature circuit resistance Is flux All of the listed here Aplied voltage Armature circuit resistance Is flux All of the listed here Aplied voltage ANSWER DOWNLOAD EXAMIANS APP
DC Motors Where D.C. motor of H.P. 12 or more requires frequent starting, stopping, reversing and speed control Three point starter is used Four point starter is used All above can be used Drum type controller is used Three point starter is used Four point starter is used All above can be used Drum type controller is used ANSWER DOWNLOAD EXAMIANS APP
DC Motors In a D.C. series motor, if the armature current is reduced by 50%, the torque of the motor will be equal to 100% of the previous value 50% of the previous value 25% of the previous value 10% of the previous value 100% of the previous value 50% of the previous value 25% of the previous value 10% of the previous value ANSWER DOWNLOAD EXAMIANS APP
DC Motors Which one of the following is not the function of pole shoes in a D.C. machine? To support the field coils To spread out flux for better uniformity To reduce the reluctance of the magnetic path To reduce eddy current loss To support the field coils To spread out flux for better uniformity To reduce the reluctance of the magnetic path To reduce eddy current loss ANSWER DOWNLOAD EXAMIANS APP
DC Motors The main disadvantage of the Ward-Leonard control method is Low efficiency at high loads High maintenance cost All of these High initial cost Low efficiency at high loads High maintenance cost All of these High initial cost ANSWER DOWNLOAD EXAMIANS APP
DC Motors A three point starter is considered suitable for Shunt as well as compound motors All D.C. motors Shunt motors Shunt, compound and series motors Shunt as well as compound motors All D.C. motors Shunt motors Shunt, compound and series motors ANSWER DOWNLOAD EXAMIANS APP
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