JL Test Study Guide Questions and Verified Solutions 2026/2027

JL Test Study Guide Questions and Verified Solutions 2026/2027 What is a transformer? - Correct Answer An electrical device used to transfer alternating current from one circuit to another at the same frequency, but at different values of voltage and current. What is the definition of a a phase. - Correct Answer Displacement between two alternating quantities which have the same frequency but do not rise and fall in unison Why ground the secondary side of a transformer? - Correct Answer I would ground the secondary side if I could not properly isolate it. You have three 120/240 V transformer's. The customer wants 440 V. How would you achieve this? - Correct Answer Hook secondary up Y series to get 416 and step up taps. What precautions do we take before connecting transformers in a bank? - Correct Answer Check nameplate for voltage, impedance, polarity. How do you obtain full capacity of a transformer? - Correct Answer Parallel coils. How do you obtain full potential of a transformer? - Correct Answer Series coils. What are the steps to grounding? - Correct Answer Identify isolate, test, clean, ground, tag. Why do we ground? - Correct Answer To cause an operation. What is the definition of a neutral? - Correct Answer Current carrying conductor at or near ground potential. What is the definition of angular displ