DC Motors Which of the following motors is most suitable for signalling devices and many kinds of timers ? Induction motor C. series motor Reluctance motor C. shunt motor Induction motor C. series motor Reluctance motor C. shunt motor ANSWER DOWNLOAD EXAMIANS APP
DC Motors As there is no back e.m.f. at the instant of starting a D.C. motor, in order to prevent a heavy current from flowing though the armature circuit A high value resistor is connected across the field winding A resistance is connected parallel to the armature Armature is temporarily open circuited A resistance is connected in series with armature A high value resistor is connected across the field winding A resistance is connected parallel to the armature Armature is temporarily open circuited A resistance is connected in series with armature ANSWER DOWNLOAD EXAMIANS APP
DC Motors For the same H.P. rating and full load speed, following motor has poor starting torque Cumulatively compounded Differentially compounded Shunt Series Cumulatively compounded Differentially compounded Shunt Series ANSWER DOWNLOAD EXAMIANS APP
DC Motors Armature reaction in dc motor is increased By interpoles When the armature current increases When the field current increases When the armature current decreases By interpoles When the armature current increases When the field current increases When the armature current decreases ANSWER DOWNLOAD EXAMIANS APP
DC Motors The direction of rotation of a D.C. series motor can be changed by Interchanging supply terminals None of these Interchanging field terminals Either of (A) and (B) above Interchanging supply terminals None of these Interchanging field terminals Either of (A) and (B) above ANSWER DOWNLOAD EXAMIANS APP
DC Motors For constant torque drive which speed control method is preferred? Mechanical loading system Field control Armature voltage control Shunt armature control Mechanical loading system Field control Armature voltage control Shunt armature control ANSWER DOWNLOAD EXAMIANS APP
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