NETA 3 questions with correct answers

NETA 3 questions with correct answers

Insulator thickness for high voltage power lines should be based on ______ voltage - ANSWER: ➡ Peak
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Maximum acceptable ASTM D974 on new transformer oil is ______ - ANSWER: ➡ .015
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Minimum IR for 480 gen with random wound stator coils manuf in 1995 - ANSWER: ➡ 5 megohms
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Bimetallic strips in thermal relays have two metal strips with a different - ANSWER: ➡ Coefficient of
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expansion
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AC dielectric withstand Maintenance of 5 kV dry transformer should not exceed _____% of factory
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voltage for one minute - ANSWER: ➡ 65
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Lead acid storage batteries do Not include which hazard? - ANSWER: ➡ High voltage arcing
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High resistance connections in DC armatures are best identified by - ANSWER: ➡ Trending
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Air terminals for lightning protection that exceed 24" shall be supported at not less than _____ their
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height - ANSWER: ➡ 1/2
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Most low voltage circuit breaker manufacturers recommend that contacts touch within _____" of each
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other - ANSWER: ➡ 1/8
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Circular mil area = - ANSWER: ➡ D squared
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What would cause low specific gravity in a battery - ANSWER: ➡ Low charge voltage
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D1816 1mm gap - ANSWER: ➡ 34kV
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, Locked rotor kva - ANSWER: ➡ HP x max code value
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Locked rotor current - ANSWER: ➡ Locked rotor kVA/(1.732 x kV)
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A moving iron meter operates by applying ____ current to the coil - ANSWER: ➡ AC
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Arcing fault relative to bolted fault is _____% - ANSWER: ➡ 80
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a . b= - ANSWER: ➡ |a| x |b| x cosine theta
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Which test is an acceptable alternative to PF on transformer bushings? - ANSWER: ➡ NBDFR
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The easiest method for determining contact sequence on a low voltage cb is - ANSWER: ➡ Light circuit
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Trip current supervision is a metering parameter of an IED True or False - ANSWER: ➡ False
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IEC61850 has roots in RTU while DNP3 has roots in LAN/WAN true or false - ANSWER: ➡ False
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The generally accepted deviation from nominal 60hz is _____hz - ANSWER: ➡ .5
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A ______requires very little energy to be activated - ANSWER: ➡ Shunt reactor
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In a wye connected system without neutral grounding, zero sequence currents are - ANSWER: ➡ Zero
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True/false: Fuse resistance is a required maintenance test for low voltage starters with fused
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protection - ANSWER: ➡ False
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Resistance grounding is used for voltages - ANSWER: ➡ 3.3kV-11kV
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