Electricity level 3 section 7 Questions and Answers 2024 ,2025 Fully Solved 100%

A three=phase, four-wire system that has the advantage of providing three-phase power and allowing lighting to be connected between any of the secondary phases and the neutral would have a(n) ________. - wye secondary A transformer can be checked for shorted turns using a(n) - TTR tester Capacitors are covered in____________. - NEC Article 460 Conductors connected to the high leg of a four-wire delta system be color-coed with what color of insulation or tape? - Orange Magnetic leakage in a transformer causes a decrease in ____________ when the transformer is loaded. - secondary voltage Most control transformers are ______. - dry-type step-down The installation of resistors and reactors is covered in - NEC Article 470 The insulating oil in a liquid-filled transformer should be regularly tested for ________. - Dielectric strength To ensure maximum safety in control transformer, the secondary control circuit is ________. - isolated from the primary line circuit What components are installed to increase the power factor and decrease the cost of electricity caused by large inductive loads? - Capacitors What is the voltage of the secondary in a transformer with 200 turns in the primary, 20 turns in the secondary, and an input voltage of 2,400V? - 240VWhat type of transformer provides 120V between the center-tapped terminal and each ungrounded terminal on either side and 240V across the full winding of each phase? - Delta-delta When voltage is stepped down in a transformer, what happens to the current in the same circuit? - It is stepped up Which of the following forces are always present in an AC circuit? - Inductance and true power Which of the following refers to the condition in which two circuits share the energy of one of the circuits? - Mutal induction Which of the following types of tranformers must be installed in a vault? - 35kV oil-insulated transformers Which of the following types of transformers can be ventilated, air-cooled, or sealed? - Dry-type transformers Which winding of a transformer is connected to the load? - Secondary