Sri Gopikrishna Infrastructure Assistant Electrical Engineer Interview Questions and Answers

Earthing is the process of connecting electrical equipment or installations to the earth to prevent electric shock and protect against electrical faults.

• Earthing involves creating a connection between the electrical system and the earth.

• It is done by burying a metal conductor, such as a copper rod, in the ground.

• The metal conductor is connected to the electrical system using a wire or cable.

• Earthing provides a path for...read more

The type of DGs used at our site are diesel generators.

• Diesel generators are commonly used as backup power sources in various industries.

• They are reliable and can provide a continuous power supply during electrical outages.

• DGs are often used in remote locations or areas with unreliable grid power.

• They require regular maintenance and fuel supply to operate efficiently.

• Examples of DGs used at our site include Cummins, Ca

LT line refers to Low Tension line while HT line refers to High Tension line.

• LT line carries low voltage and is used for domestic and small-scale commercial purposes.

• HT line carries high voltage and is used for industrial and large-scale commercial purposes.

• LT line voltage is typically up to 440 volts, while HT line voltage is above 440 volts.

• LT lines are usually overhead lines, while HT lines can be both overhead and ...read more

We used different types of circuit breakers at the site depending on the specific requirements.

• We used air circuit breakers (ACBs) for low voltage applications.

• For medium voltage applications, we used vacuum circuit breakers (VCBs) or oil circuit breakers (OCBs).

• In high voltage installations, we used sulfur hexafluoride (SF6) circuit breakers.

• For specialized applications like generator protection, we used differential ...read more

The size of transformers used at the site varied depending on the specific requirements of the project.

• Transformers used at the site were of different sizes based on the power demand of the electrical system.

• For smaller projects, transformers with a capacity of around 100 kVA were used.

• For medium-sized projects, transformers with a capacity ranging from 250 kVA to 500 kVA were used.

• For larger projects, transformers wit...read more

We used a stationary type batching plant at the site.

• We used a stationary type batching plant for our construction project.

• The stationary batching plant had a higher production capacity compared to mobile plants.

• It was equipped with multiple storage bins for different types of aggregates.

• The plant had a conveyor belt system to transfer the aggregates to the mixer.

• We used this type of batching plant because it provided