1.WHICH ESITNS I RUMENT IS USEDT OMEASURE LOW RESISTANCE; A. HEAVY DUTY MEGGER B

Question

1.WHICH ESITNS I RUMENT IS USEDT OMEASURE LOW RESISTANCE; A. HEAVY DUTY MEGGER B. HI-POT TEST SET C. DLR.O D. PHASE ROTATION TESTER 2 WHICH TEST INSTRUMENT IDENTIFYS THE GROSS FAULT IN THE INSULATION A. HI-POT TESTER B. D.L.R.O C. OSCILLSCOPE D. HEAVY DUTY MEGGER 3. WHAT DO YOU PERFORM BEFORE DISCONNECTING THE MEGGER OR HI-POT TEST LEADS AFTER EACH TEST A. CHECK GROUND CONNECTIONS B. BLEED OFF RESIDUAL VOLTAGES C. REMOVE GROUND LEAD FIRST D. CHECK THE TEST LEADS WHAT IS THE CORRECT METHOD OF RACKING IN A CIRCUIT BREAKER A. DOOR OPEN CONTROL POWER ON SPRING DISCHARGED,BREAKER OPEN B. DOOR CLOSE,CONTROLPOWER OFF SPRING DISCHARGED BREAKER OPEN C. DOOR CLOSED,CONTROL POWER OFF SPRING CHARGED,BREAKER OPEN D. DOOR OPEN,CONTROL POWER OFF SPRING DISCHARGED BREAKER OPEN 5. WHEN PERFORMING A VACUUM INTEGRITY TEST WHAT IS THE SAFE MINMUM DISTANCE FROM THE TEST A. 2 FEET B. 4 FEET C. 6 FEET D. 3 FEET 6. BEFORE WORKING ON CAPACITORS, THEY SHOULD BE A. ISOLATED B. REMOVED C. CHANGED D. ISOLATED AND DISCHARGED USING 1 MEG-OHM RESISTER

Explanation / Answer

1-C is correct answer.

- D.L.R.O is known as digital low resistance ohmmeter . It is a digital device which is used to measure very low resistance. Hence correct.

Why others incorrect?

-HIPOT test kit is used for high voltage dielectric testing. HENCE INCORRECT.

-Heavy duty Megger is used for measuring resistances. Most Megger can measure both type of resistances high or low. But according to question it is not suitable answer. Hence incorrect.

- Phase rotation tester tests the phase sequence . Hence incorrect.

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