KEC International Electrical Engineer Interview Questions, Process, and Tips

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Q1. Root 3 what is this
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Q2. 66 conversation for Roman number
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Q1. Auxin what is theis
Ans. 
Auxin is a plant hormone that regulates growth and development.
• Auxin is responsible for cell elongation and division in plants.

• It plays a role in phototropism, gravitropism, and apical dominance.

• Examples of auxin include indole-3-acetic acid (IAA) and synthetic auxins like 2,4-D.
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Q2. Iaa what is this
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Q1. Tell me about your past work experience
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Q2. What is the difference between CB and isolator
Ans. 
CB is a switch that can interrupt the circuit during fault conditions, while an isolator is a switch that can only isolate the circuit.
• CB is used for protection against overcurrent, short circuit, and earth fault

• Isolator is used for isolation of a circuit for maintenance or repair work

• CB can be operated manually or automatically, while isolator is operated manually only

• CB has contacts that can break the circuit, while
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Q3. Rating of various equipment used in particular sub station
Ans. 
The rating of equipment in a substation is crucial for its efficient functioning.
• The rating of transformers should be based on the maximum load they are expected to carry.

• Circuit breakers should be rated for the maximum fault current they may encounter.

• Busbars should be rated for the maximum current they may carry.

• Lightning arresters should be rated for the maximum voltage they may encounter.

• The rating of capacitors sh...read more
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Q4. What is power transformer
Ans. 
A power transformer is an electrical device that transfers electrical energy between two or more circuits through electromagnetic induction.
• It is used to step up or step down the voltage of an alternating current (AC) power supply.

• It consists of two or more coils of insulated wire wound around a magnetic core.

• The primary coil is connected to the input voltage source and the secondary coil is connected to the output loa...read more
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Q5. What are the different types of test to be performed in power transformer
Ans. 
Different types of tests to be performed in power transformer
• Insulation resistance test

• Ratio test

• Polarity test

• Vector group test

• No-load test

• Load test

• Temperature rise test
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Q6. Function of different types of relay
Ans. 
Relays are used to control high voltage or current circuits with low voltage signals.
• Electromagnetic relays use an electromagnet to open or close a circuit.

• Solid-state relays use semiconductors to switch the circuit.

• Thermal relays protect motors from overheating by tripping the circuit when the temperature exceeds a set limit.

• Time delay relays are used to delay the opening or closing of a circuit for a specific time pe...read more
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