Compass Group Support Services Electrical Maintenance Supervisor Interview Questions and Answers

Q1. Technical questions
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Q1. What is transformer vector group
Ans. 
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
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Q2. Why we are desting vbd test in transformer
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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
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Q1. About Switch yard and SLD
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Q2. Generators, synchronisation, excitor, AVR.
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Q1. Power and distrubution transformers and protections.
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Q2. Simocodes and its programmes, generator governors,
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Q1. About salary and salary negotiation.
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Q2. Company rules and regulations.
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Q1. What is transformer?
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Q1. Maintenance engineer
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Q2. Facility management, inventory, MMR, DSR, DMR
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Q1. Only facility maintenance
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Q2. Electrical, plumbing, HVAC, civil
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Q1. Why job thik Electrical filed
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Q2. What this work electrical engineering
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Q3. Total Experience this field
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Q1. Transformers knowledge
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Q2. Dg knowledge of vcb lt panel
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Electrical maintenance

Q1. What is starter and starter circuit?
Ans. 
A starter is an electrical device that starts and stops a motor by providing the necessary power to it. The starter circuit is the electrical circuit that controls the starter.
• A starter is typically composed of a contactor, overload relay, and control circuit.

• The starter circuit includes components such as switches, relays, fuses, and wiring.

• The starter circuit is responsible for providing power to the starter and ensu...read more
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Q2. What is transformer?Types of transformer ?
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A transformer is an electrical device that transfers electrical energy between two or more circuits through electromagnetic induction.
• Transformers are used to increase or decrease the voltage in electrical power transmission and distribution systems.

• They consist of two or more coils of wire, known as windings, that are wound around a core made of magnetic material.

• The primary winding receives electrical energy from the...read more
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Q3. What is circuit breaker? types of circuit breaker?
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A circuit breaker is an electrical switch that automatically interrupts the flow of current in a circuit.
• Circuit breakers are used to protect electrical circuits from overloads, short circuits, and faults.

• They are designed to open and close the circuit under normal and abnormal conditions.

• Common types of circuit breakers include thermal, magnetic, and thermal-magnetic circuit breakers.

• Thermal circuit breakers use a bim...read more
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Q4. What is generator? working principle of generator?
Ans. 
A generator is a device that converts mechanical energy into electrical energy.
• Generators work on the principle of electromagnetic induction.

• They consist of a rotor and a stator, with the rotor rotating inside the stator.

• The rotation of the rotor creates a magnetic field, which induces an electrical current in the stator windings.

• The electrical output of a generator can be AC or DC, depending on the design.

• Examples of ...read more
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Q5. What is mcb? working principle of mcb?
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MCB stands for Miniature Circuit Breaker. It is an electrical switch that automatically trips when the current exceeds its rating.
• MCB is a type of circuit breaker that is commonly used in residential and commercial buildings.

• It is designed to protect electrical circuits from damage caused by overloading or short circuits.

• The working principle of MCB is based on the thermal and magnetic properties of the materials used ...read more
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