Category: Electrical MCQ

1. What is the primary dielectric medium used in Vacuum Circuit Breakers (VCBs)? (a). Gas (b). Oil (c). Air (d).

1. What is the primary medium used in SF6 circuit breakers to extinguish electrical arc? (a). Oil (b). Air (c).

1. What is the interrupting medium used in Air Blast Circuit Breaker (ABCB)? (a). Oil (b). Water (c). compressed air

1. What is the primary quenching medium used in air break circuit breakers? (a). Water (b). boil (c). air (d).

1. What is the primary function of insulating oil in oil circuit breakers? (a). generate electricity (b). extinguishing the arc

1. What is the primary purpose of a circuit breaker? (a). Producing abnormal currents (b). Interrupts abnormal currents and acts

1. What is the primary goal of earthing in electrical systems? (a). Enhancing system efficiency (b). Facilitating the venting of

1. Where is Step-Up or Primary Substations positioned? (a). Load centers (b). Generating stations (c). Towns (d). Industrial areas 2.