6Losses in a DC machine include copper, iron and:ADielectric losses onlyBRadiation lossesCCorona lossesDMechanical (friction and windage) lossesView AnswerDiscussWorkspaceReportSaveEasy
7A DC series motor should never be started:AWith loadBWithout loadCSlowlyDWith a starterView AnswerDiscussWorkspaceReportSaveEasy
8The speed of a DC shunt motor can be increased by:AReducing supply voltageBAdding loadCIncreasing the field currentDReducing the field current (field weakening)View AnswerDiscussWorkspaceReportSaveEasy
9The speed of a DC motor is:AProportional to fluxBDirectly proportional to back EMF and inversely proportional to fluxCConstant alwaysDIndependent of fluxView AnswerDiscussWorkspaceReportSaveEasy
10Brushes in DC machines are usually made of:ACopperBIronCCarbonDAluminiumView AnswerDiscussWorkspaceReportSaveEasy