1The rated breaking capacity of a circuit breaker is the:ANormal load currentBVoltage onlyCNumber of operationsDMaximum fault current it can safely interruptView AnswerDiscussWorkspaceReportSaveEasy
2Which circuit breaker uses SF₆ gas?AOil circuit breakerBVacuum breakerCAir-blast breakerDSF₆ circuit breakerView AnswerDiscussWorkspaceReportSaveEasy
3A circuit breaker differs from a fuse because it:ACannot protect circuitsBWorks only on DCCMelts when overloadedDCan be reset and reused after trippingView AnswerDiscussWorkspaceReportSaveEasy
4An MCB is used for:AProtection of low-voltage circuits against overload and short circuitBGenerators onlyCHigh-voltage transmission linesDTransformers onlyView AnswerDiscussWorkspaceReportSaveEasy
5A surge arrester is connected:ABetween two phases onlyBBetween the line and earthCIn series with the lineDAcross the load onlyView AnswerDiscussWorkspaceReportSaveEasy