L&T Power Commissioning Manager Interview Questions and Answers

There are several types of testing performed in transformers.

• Routine testing: performed during manufacturing to ensure the transformer meets specifications.

• Type testing: performed on a sample transformer to verify its design and performance.

• Special testing: performed for specific requirements or conditions, such as temperature rise testing or impulse testing.

• Diagnostic testing: performed to assess the condition of a tr...read more

A transformer double pole structure is a configuration that includes two poles in a transformer.

• A transformer double pole structure is used to increase the voltage capacity of a transformer.

• It consists of two separate poles, each with its own primary and secondary windings.

• The primary windings of both poles are connected in parallel, while the secondary windings are connected in series.

• This configuration allows for hig...read more

The current carrying capacity of AB cable refers to the maximum amount of electrical current that the cable can safely carry.

• The current carrying capacity depends on factors such as the cable's size, material, insulation, and ambient temperature.

• It is important to consider the cable's ampacity rating and derating factors for different installation conditions.

• AB cable is typically used for overhead power distribution an...read more

Hazardous classification refers to the categorization of substances or environments based on their potential to cause harm or danger.

• Hazardous classification is used to identify and communicate the level of risk associated with different substances or environments.

• It helps in determining the appropriate safety measures and precautions to be taken.

• Classification criteria include factors such as flammability, explosivene...read more

Electrical codes play a crucial role in lighting design, ensuring safety, efficiency, and compliance.

• Electrical codes provide guidelines for the installation, wiring, and operation of lighting systems.

• They specify the minimum requirements for electrical components, such as switches, fixtures, and wiring methods.

• Codes address issues like proper grounding, circuit protection, and voltage limitations to prevent electrical...read more