DC Motors Dc series motors are used in those applications where _____ is required. None of the listed here High starting torque Constant speed Low no load speed None of the listed here High starting torque Constant speed Low no load speed ANSWER DOWNLOAD EXAMIANS APP
DC Motors Which method of braking is generally used in elevators? Regenerative braking Rheostat braking Plugging None of these Regenerative braking Rheostat braking Plugging None of these 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 Armature is temporarily open circuited A resistance is connected parallel to the armature A resistance is connected in series with armature A high value resistor is connected across the field winding Armature is temporarily open circuited A resistance is connected parallel to the armature A resistance is connected in series with armature ANSWER DOWNLOAD EXAMIANS APP
DC Motors The direction of rotation of a D.C. series motor can be changed by Interchanging supply terminals Interchanging field terminals None of these Either of (A) and (B) above Interchanging supply terminals Interchanging field terminals None of these Either of (A) and (B) above ANSWER DOWNLOAD EXAMIANS APP
DC Motors The power mentioned on the name plate of an electric motor indicates The power drawn in kVA The power drawn in kW The gross power The output power available at the shaft The power drawn in kVA The power drawn in kW The gross power The output power available at the shaft ANSWER DOWNLOAD EXAMIANS APP
DC Motors Excessive motor vibration is caused by Worn bearings Bent shaft Open armature coil Too much brush tension Worn bearings Bent shaft Open armature coil Too much brush tension ANSWER DOWNLOAD EXAMIANS APP
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