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Question 9/43
In azone-selective interlocking (ZSI)scheme, what condition allows an upstream breaker to tripwithout intentional delay?
Correct Answer: C
In ZSI schemes, downstream breakers send restraint signals upstream when they detect faults. Ifno restraint signal is received, the upstream breaker assumes the downstream device failed and tripswithout intentional delayto clear the fault. NETA Level 2 technicians must understand this fail-safe logic when commissioning protection systems and verifying selective coordination.
- Question List (43q)
- Question 1: A 3-phase, 480 V system supplies a balanced load drawing50 A...
- Question 2: A digital multimeter (DMM), when set to measure voltage, typ...
- Question 3: A tagout device must be able to withstand a minimum pull for...
- Question 4: A transformer contains insulating fluid with aspecific gravi...
- Question 5: Using the provided diagram, what is thetotal circuit resista...
- Question 6: In apurely inductive circuit, what is the phase relationship...
- Question 7: Cells are connected inparallelin order to increase:...
- Question 8: OSHA requires testing of a voltmeterafterverifying absence o...
- Question 9: In azone-selective interlocking (ZSI)scheme, what condition ...
- Question 10: ASTM D 924 is a required acceptance test for liquid-filled t...
- Question 11: Which property of an insulating liquid is defined as thelowe...
- Question 12: Writethree thousand forty-eight ten-thousandthsin decimal fo...
- Question 13: During aCT saturation test, voltage increases sharply with l...
- Question 14: Which portion of a three-phase system carries current throug...
- Question 15: Which voltage is recommended by NETA-ATS for a15-minute AC w...
- Question 16: When reinstalling a draw-out circuit breaker into a metal-cl...
- Question 17: The three-phase connection in whichone end of each winding i...
- Question 18: Secondary injection testing of a low-voltage air circuit bre...
- Question 19: Which portion of an electrical transmission system experienc...
- Question 20: To reverse the direction of rotation of a three-phase induct...
- Question 21: According to NETA-ATS, which test decal color should be appl...
- Question 22: In azone-interlocked low-voltage circuit breakerscheme, if t...
- Question 23: Thebreaking capacityof a circuit breaker is typically expres...
- Question 24: Cells are connected inseriesin order to increase:...
- Question 25: Under what condition istagout without lockoutpermitted accor...
- Question 26: Which terminal set would you expect to find on adigital low-...
- Question 27: During charging of lead-acid batteries, whichexplosive gasma...
- Question 28: The dataplate on a condenser bushing listsC2values. What do ...
- Question 29: During avacuum circuit breaker bottle integrity test, which ...
- Question 30: Using a typical breaker control diagram, which coil is most ...
- Question 31: The smallest particle of a substance that still retains the ...
- Question 32: A battery bank consists of60 cells, each rated2 V. What is t...
- Question 33: When personnel are working in apermitted confined space, how...
- Question 34: Polarization Index (PI) is defined as the ratio of insulatio...
- Question 35: What is theprimary purposeof the National Electrical Code (N...
- Question 36: What is the purpose of ablow-out coilin a circuit breaker?...
- Question 37: Underground service conductors between the service equipment...
- Question 38: For aDielectric Absorption Ratio (DAR)test on a transformer,...
- Question 39: When applying personal protective grounds, which connection ...
- Question 40: Each switchboard used asservice equipmentmust be provided wi...
- Question 41: Shown below is a current transformer with multiple secondary...
- Question 42: Arc-flash incident energy is expressed in:...
- Question 43: What is meant by adead-tank circuit breaker?...
