Oman National Engineering & Investment Company Senior Electrical Technician Interview Questions and Answers

Transformer principle involves electromagnetic induction to transfer electrical energy between two or more circuits.

• Transformers work based on Faraday's law of electromagnetic induction.

• They consist of primary and secondary coils wound around a core.

• The primary coil is connected to a voltage source, creating a changing magnetic field.

• This changing magnetic field induces a voltage in the secondary coil, transferring ene...read more

Ring main unit is a type of switchgear used in electrical distribution systems to control and protect power cables.

• Ring main unit consists of a ring of interconnected switches and fuses to distribute power to multiple circuits.

• It is used to isolate faulty sections of the network and maintain power supply to the rest of the system.

• Ring main unit can be operated manually or automatically depending on the design.

• Examples ...read more

HV panels are typically tested using high voltage testing equipment to ensure they are functioning properly and safely.

• HV panels are tested using high voltage testing equipment to check insulation resistance, continuity, and functionality

• Testing is done according to relevant standards and safety regulations

• Examples of high voltage testing equipment include insulation testers, megohmmeters, and high potential testers