Single Phase Motors The speed control of universal motor used for sewing machines is by Friction Centrifugal mechanism Varying the resistance Tapping the field Friction Centrifugal mechanism Varying the resistance Tapping the field ANSWER DOWNLOAD EXAMIANS APP
Single Phase Motors If a DC series motor is operated on AC supply, it will All of the listed here Have poor power factor Have poor efficiency Spark excessively All of the listed here Have poor power factor Have poor efficiency Spark excessively ANSWER DOWNLOAD EXAMIANS APP
Single Phase Motors The wattage rating for a ceiling fan motor will be in the range 250 to 500 W 50 to 150 W 200 to 250 W 10 to 20 W 250 to 500 W 50 to 150 W 200 to 250 W 10 to 20 W ANSWER DOWNLOAD EXAMIANS APP
Single Phase Motors The direction of rotation of an hysteresis motor is determined by none of these position of shaded pole with respect to main pole interchanging the supply leads retentivity of the rotor material none of these position of shaded pole with respect to main pole interchanging the supply leads retentivity of the rotor material ANSWER DOWNLOAD EXAMIANS APP
Single Phase Motors If a single phase induction motor runs slower than normal, the most likely defect is None of these short-circuit in the winding open-circuit in the winding worn bearings None of these short-circuit in the winding open-circuit in the winding worn bearings ANSWER DOWNLOAD EXAMIANS APP
Single Phase Motors Which of the following statements regarding hysteresis motor is in incorrect ? It accelerates from rest to full-speed almost instantaneously It is extremely sensitive to fluctuations in supply voltage It is extremely quiet in operation Its high starting torque is due to its high rotor hysteresis loss It accelerates from rest to full-speed almost instantaneously It is extremely sensitive to fluctuations in supply voltage It is extremely quiet in operation Its high starting torque is due to its high rotor hysteresis loss ANSWER DOWNLOAD EXAMIANS APP
EXAMIANS