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
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
Between Field’s test and Hopkinson’s test the main common thing is that both? Mark as favorite Copy Link use negligible power are regenerative tests need two similar mechanically coupled motors need two electrically coupled series motors Check Answer
For the same H.P. rating and full load speed, following motor has poor starting torque? Mark as favorite Copy Link shunt series differentially compounded cumulatively compounded Check Answer
Which of the following tests can be conducted on all types of D.C. machines? Mark as favorite Copy Link Hopkinson's test Running down test Block rotor test Brake test Check Answer
In D.C. shunt motors as load is reduced? Mark as favorite Copy Link the speed will increase abruptly the speed will increase in proportion to reduction in load the speed will remain almost constant the speed will reduce Check Answer