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Exam (elaborations)

LADWP Electrical Mechanic Test Exam UPDATED QUESTIONS AND CORRECT ANSWERS

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LADWP Electrical Mechanic Test Exam UPDATED QUESTIONS AND CORRECT ANSWERS Ohm's Law - CORRECT ANSWER V = I × R — Voltage equals current times resistance. Formula for electrical power in watts - CORRECT ANSWER Formula for power using resistance - CORRECT ANSWER Total resistance in a series circuit - CORRECT ANSWER P = V × I P = I² × R or P = V² / R R_T = R1 + R2 + R3 + ... Total resistance in a parallel circuit - CORRECT ANSWER 1 / R_T = 1 / R1 + 1 / R2 + ... Line vs phase voltage in a balanced 3-phase Wye system - CORRECT ANSWER V_phase Line vs phase current in a balanced 3-phase Wye system - CORRECT ANSWER Line vs phase current in a balanced 3-phase Delta system - CORRECT ANSWER I_phase Formula for three-phase power - CORRECT ANSWER Voltage drop - CORRECT ANSWER P = √3 × V_L × I_L × PF V_L = √3 × I_L = I_phase I_L = √3 × The reduction in voltage as electric current flows through a conductor due to resistance. RMS voltage - CORRECT ANSWER same heating effect. Effective AC voltage equal to a DC voltage that produces

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LADWP Electrical Mechanic
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LADWP Electrical Mechanic

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LADWP Electrical Mechanic Test Exam
UPDATED QUESTIONS AND CORRECT
ANSWERS
Ohm's Law - CORRECT ANSWER V = I × R — Voltage equals current times resistance.



Formula for electrical power in watts - CORRECT ANSWER P=V×I



Formula for power using resistance - CORRECT ANSWER P = I² × R or P = V² / R



Total resistance in a series circuit - CORRECT ANSWER R_T = R1 + R2 + R3 + ...



Total resistance in a parallel circuit - CORRECT ANSWER 1 / R_T = 1 / R1 + 1 / R2 + ...



Line vs phase voltage in a balanced 3-phase Wye system - CORRECT ANSWER V_L = √3 ×
V_phase



Line vs phase current in a balanced 3-phase Wye system - CORRECT ANSWER I_L = I_phase



Line vs phase current in a balanced 3-phase Delta system - CORRECT ANSWER I_L = √3 ×
I_phase



Formula for three-phase power - CORRECT ANSWER P = √3 × V_L × I_L × PF



Voltage drop - CORRECT ANSWER The reduction in voltage as electric current flows through
a conductor due to resistance.



RMS voltage - CORRECT ANSWER Effective AC voltage equal to a DC voltage that produces
same heating effect.
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LADWP Electrical Mechanic
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LADWP Electrical Mechanic

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