Sodexo Junior Engineer Electrical Interview Questions and Answers

Transformer vector group is a method used to represent the phase shift between the primary and secondary windings of a transformer.

• Transformer vector group indicates the relationship between the primary and secondary winding phases.

• It helps in determining the connection and phase shift of the transformer windings.

• Common vector groups include Yy0, Yd1, Dyn11, etc.

• Vector group is important for parallel operation of trans

VBD test is conducted in transformers to ensure insulation integrity and detect any potential faults.

• VBD test helps in identifying any weak spots in the insulation of the transformer

• It helps in preventing breakdowns and ensuring the safety and reliability of the transformer

• By conducting VBD test, any potential faults can be detected early and necessary maintenance can be carried out

• It is a standard procedure in transfo

A transformer is an electrical device that transfers electrical energy between two or more circuits through electromagnetic induction. Safety measures are important to prevent accidents and ensure proper functioning of transformers.

• A transformer is used to step up or step down voltage levels in electrical systems.

• It consists of two or more coils of wire, known as windings, which are wound around a core made of magnetic...read more

DG stands for Diesel Generator. It is a type of generator that uses diesel fuel to produce electrical energy.

• DG is commonly used as a backup power source in case of power outages.

• It consists of an engine that runs on diesel fuel and an alternator that converts mechanical energy into electrical energy.

• DG sets are often used in industries, commercial buildings, and residential complexes.

• They are capable of providing powe...read more

AHU stands for Air Handling Unit.

• AHU is a device used to regulate and circulate air as part of a heating, ventilation, and air conditioning (HVAC) system.

• It typically consists of a blower, heating or cooling elements, filters, dampers, and sound attenuators.

• AHUs are commonly found in commercial and industrial buildings to maintain indoor air quality and comfort.

• Examples of AHU manufacturers include Trane, Carrier, and

Air Handling Unit

• AHU stands for Air Handling Unit

• AHUs are used to regulate and circulate air as part of HVAC systems

• They typically consist of a blower, heating or cooling elements, filters, and dampers

• AHUs are commonly found in commercial and industrial buildings

A paint robot is a machine that automates the process of painting objects.

• Paint robots use a combination of sensors, actuators, and programming to apply paint to objects.

• They can be programmed to follow specific paths and patterns to ensure even and consistent coverage.

• Paint robots can be used in various industries such as automotive, aerospace, and manufacturing.

• They can be equipped with different types of paint appli...read more

The PT CED process refers to the Potential Transformer Current Excitation and Demagnetization process.

• PT CED process is used in electrical power systems to test and calibrate potential transformers.

• During the process, a known current is injected into the primary winding of the potential transformer.

• This current creates a magnetic field that induces a voltage in the secondary winding.

• The induced voltage is then measured...read more