As compared to an induction motor, the air gap in a D.C. motor is? Mark as favorite Copy Link less than 50% between 50% and 90% same more Check Answer
Which of the following motor has the poorest speed regulation? Mark as favorite Copy Link Shunt motor Series motor Differential compound motor Cumulative compound motor Check Answer
For a D.C. shunt motor if the excitation is changed? Mark as favorite Copy Link torque will remain constant torque will change but power will remain constant torque and power both will change torque, power and speed, all will change Check Answer
Which of the following motors have almost constant speed over their full load range? Mark as favorite Copy Link AC. series motors Low resistance squirrel cage motors D.C. shunt motors Both (b) and (c) Check Answer
In which of the following applications D.C. series motor is invariably tried? Mark as favorite Copy Link Starter for a car Drive for a water pump Fan motor Motor operation in A.C. or D.C. Check Answer
When the speed of a dc motor increases? Mark as favorite Copy Link back e.m.f. increases and current drawn decrease back e.m.f. as well as current drawn both increase back e.m.f. as well as current drawn both decrease back e.m.f. decreases and current drawn increases Check Answer
The plugging gives the? Mark as favorite Copy Link zero torque braking smallest torque braking highest torque braking none of the above Check Answer
D.C. series motors are used? Mark as favorite Copy Link where load is constant where load changes frequently where constant operating speed is needed in none of the above situations Check Answer
The maximum end-play of a motor is about? Mark as favorite Copy Link 10 mm 6 mm 2.mm 0.4 mm Check Answer
The power mentioned on the name plate of an electric motor indicates? Mark as favorite Copy Link the power drawn in kW the power drawn in kVA the gross power the output power available at the shaft Check Answer