11Merz–Price protection is a form of:ACirculating-current differential protectionBEarth leakage protectionCOvervoltage protectionDDistance protectionView AnswerDiscussWorkspaceReportSaveEasy
12Vacuum circuit breakers are commonly used for:ADC onlyBExtra-high voltages onlyCMedium voltages (around 11–33 kV)DVery low-voltage electronicsView AnswerDiscussWorkspaceReportSaveEasy
13An isolator is operated:AUnder full loadBOnly when the circuit is not carrying load currentCDuring faultsDTo interrupt short circuitsView AnswerDiscussWorkspaceReportSaveEasy
14The rated breaking capacity of a circuit breaker is the:ANumber of operationsBMaximum fault current it can safely interruptCVoltage onlyDNormal load currentView AnswerDiscussWorkspaceReportSaveEasy
15A distance (impedance) relay is used for protecting:ABatteriesBTransmission linesCHousehold wiringDMotors onlyView AnswerDiscussWorkspaceReportSaveEasy