6Earthing (grounding) of equipment is done to:AProtect people from electric shockBIncrease voltageCReduce frequencyDSave energyView AnswerDiscussWorkspaceReportSaveEasy
7Which circuit breaker uses SF₆ gas?AOil circuit breakerBVacuum breakerCAir-blast breakerDSF₆ circuit breakerView AnswerDiscussWorkspaceReportSaveEasy
8An isolator is operated:ADuring faultsBTo interrupt short circuitsCUnder full loadDOnly when the circuit is not carrying load currentView AnswerDiscussWorkspaceReportSaveEasy
9A circuit breaker differs from a fuse because it:AWorks only on DCBCan be reset and reused after trippingCMelts when overloadedDCannot protect circuitsView AnswerDiscussWorkspaceReportSaveEasy
10A differential relay operates when:AThe difference between currents entering and leaving a zone exceeds a set valueBVoltage is normalCCurrent is equal on both sidesDFrequency is constantView AnswerDiscussWorkspaceReportSaveEasy