Electricity level 3 section 7 questions and answers A+ grade assured 2024/2025 GUARANTEED GRADE A+

Electricity level 3 section 7 questions and answers A+ grade assured 2024/2025 GUARANTEED GRADE A+ 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 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? 240V The installation of resistors and reactors is covered in NEC Article 470 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 A transformer can be checked for shorted turns using a(n) TTR tester Which winding of a transformer is connected to the load? Secondary Magnetic leakage in a transformer causes a decrease in ____________ when the transformer is loaded. secondary voltage Capacitors are covered in____________. NEC Article 460 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 Conductors connected to the high leg of a four-wire delta system be color-coed with what color of insulation or tape? Orange What components are installed to increase the power factor and decrease the cost of electricity caused by large inductive loads? Capacitors Most control transformers are ______. dry-type step-down What 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 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 CONTINUED...