DC Motors D.C. series motors are used Where load is constant Where load changes frequently None of these Where constant operating speed is needed Where load is constant Where load changes frequently None of these Where constant operating speed is needed 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 Below the normal speed only None of the listed here Above as well as below the normal speed Above the normal speed only Below the normal speed only None of the listed here ANSWER DOWNLOAD EXAMIANS APP
DC Motors Which of the following motors is most suitable for signalling devices and many kinds of timers ? Induction motor Reluctance motor C. shunt motor C. series motor Induction motor Reluctance motor C. shunt motor C. series motor ANSWER DOWNLOAD EXAMIANS APP
DC Motors The power mentioned on the name plate of an electric motor indicates The gross power The power drawn in kW The output power available at the shaft The power drawn in kVA The gross power The power drawn in kW The output power available at the shaft The power drawn in kVA ANSWER DOWNLOAD EXAMIANS APP
DC Motors If conditions for maximum power for a dc motor are established, the efficiency of the motor will be 60 to 70 % Less than 50% 100 % 80 to 90 % 60 to 70 % Less than 50% 100 % 80 to 90 % ANSWER DOWNLOAD EXAMIANS APP
DC Motors In a dc motor, the brushes are shifted from the mechanical neutral plane in a direction opposite to the rotation to _____ Increase speed Decrease speed Reduce sparking Produce flat characteristics Increase speed Decrease speed Reduce sparking Produce flat characteristics ANSWER DOWNLOAD EXAMIANS APP
EXAMIANS