Raj Petro Specialities Interview Questions and Answers

The number of circuit breakers used in an electrical system varies depending on the size and complexity of the system.

• The number of circuit breakers used in an electrical system depends on factors such as the size of the system, the number of circuits, and the specific requirements of the building or facility.

• Residential electrical systems typically have a main circuit breaker at the electrical panel, along with individual circuit breakers for each circuit in the house.

• Commer...read more

The single line diagram for HY to LT Panel diagram is a visual representation of the electrical connections and components in the system.

• The single line diagram shows the flow of electrical power from the HY (High Voltage) side to the LT (Low Tension) side.

• It includes the main components such as transformers, circuit breakers, switches, and control devices.

• The diagram also indicates the interconnections between different panels and equipment.

• Symbols and labels are used to rep...read more

Current transformer secondary is open to prevent damage to the transformer and connected equipment.

• An open secondary circuit prevents excessive current flow and protects the transformer from damage.

• It allows for safe measurement and monitoring of current without risk of short circuits.

• An open secondary also prevents damage to connected equipment by isolating it from high currents.

• In case of a fault or overload, an open secondary circuit ensures the safety of personnel working...read more

In a power failure situation, effective management involves ensuring safety, communication, and contingency planning.

• Ensure the safety of employees and customers by providing emergency lighting and clear evacuation procedures.

• Maintain open lines of communication with staff, customers, and relevant authorities to provide updates and coordinate actions.

• Implement contingency plans such as backup power sources, alternative work locations, or temporary shutdowns.

• Train employees on...read more

CT and PT are both electrical devices used in power systems, but they have different functions and applications.

• CT stands for Current Transformer, while PT stands for Potential Transformer.

• CTs are used to measure and transform high currents into manageable levels for instruments and protective relays.

• PTs are used to measure and transform high voltages into low voltages for instruments and protective relays.

• CTs are typically used in conjunction with ammeters and relays to moni...read more