DC Motors Which of the following motors is most suitable for signalling devices and many kinds of timers ? C. series motor Reluctance motor C. shunt motor Induction motor C. series motor Reluctance motor C. shunt motor Induction motor ANSWER DOWNLOAD EXAMIANS APP
DC Motors In dc machines fractional pitch winding is used To increase the generated emf To improve cooling To reduce the sparking To reduce the generated emf To increase the generated emf To improve cooling To reduce the sparking To reduce the generated emf ANSWER DOWNLOAD EXAMIANS APP
DC Motors For a D.C. shunt motor if the excitation is changed Torque and power both will change Torque will change but power will remain constant Torque will remain constant Torque, power and speed, all will change Torque and power both will change Torque will change but power will remain constant Torque will remain constant Torque, power and speed, all will change ANSWER DOWNLOAD EXAMIANS APP
DC Motors The direction of rotation of a D.C. series motor can be changed by Interchanging field terminals None of these Interchanging supply terminals Either of (A) and (B) above Interchanging field terminals None of these Interchanging supply terminals Either of (A) and (B) above ANSWER DOWNLOAD EXAMIANS APP
DC Motors Excessive motor vibration is caused by Too much brush tension Worn bearings Open armature coil Bent shaft Too much brush tension Worn bearings Open armature coil Bent shaft ANSWER DOWNLOAD EXAMIANS APP
DC Motors By flux control method of speed control of a dc shunt motor, we can obtain speeds. Above as well as below the normal speed Above the normal speed only None of the listed here Below the normal speed only Above as well as below the normal speed Above the normal speed only None of the listed here Below the normal speed only ANSWER DOWNLOAD EXAMIANS APP
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