Rays Power Infra Interview Questions and Answers

A step-up transformer is used to increase the voltage in an electrical circuit.

• Step-up transformers have more turns in the secondary coil than in the primary coil.

• They work based on the principle of electromagnetic induction.

• The primary coil is connected to a power source with a lower voltage, while the secondary coil is connected to the load.

• The increased voltage in the secondary coil is proportional to the ratio of the number of turns in the secondary coil to the number of ...read more

MSP (Microsoft Project) is a project management software developed by Microsoft, while Primavera is a project management software developed by Oracle.

• MSP is developed by Microsoft, while Primavera is developed by Oracle.

• MSP is more commonly used for smaller projects, while Primavera is preferred for larger and more complex projects.

• MSP is known for its user-friendly interface and ease of use, while Primavera is known for its robust features and advanced capabilities.

• MSP is of...read more

I will plan a 50 Mwp project by conducting feasibility studies, creating a detailed project timeline, securing necessary permits, sourcing materials and contractors, and implementing a quality control plan.

• Conduct feasibility studies to assess site suitability and potential challenges

• Create a detailed project timeline outlining key milestones and deadlines

• Secure necessary permits and approvals from local authorities

• Source materials and contractors through a competitive biddin...read more

The critical path is the longest sequence of tasks in a project that must be completed on time in order for the project to finish on schedule.

• Identifying the critical path helps in determining the minimum time needed to complete a project.

• It consists of tasks that have zero slack or float, meaning any delay in these tasks will delay the entire project.

• Activities on the critical path are often marked with a double line in project management diagrams.

• By focusing on tasks on the...read more

The commissioning process of a PV solar plant involves testing, adjusting, and optimizing the system to ensure it is functioning properly.

• Testing the electrical components and connections to ensure they are working correctly

• Adjusting the system settings to maximize efficiency and output

• Optimizing the performance of the solar panels to achieve the desired energy production

• Checking for any potential issues or malfunctions that may affect the operation of the plant

Transformer types of testing include routine tests, type tests, and special tests to ensure proper functioning and safety.

• Routine tests include insulation resistance, turns ratio, and polarity tests.

• Type tests are conducted on a prototype to verify design parameters like temperature rise and short-circuit withstand.

• Special tests may include impulse voltage, partial discharge, and noise level tests.

• Testing ensures transformers meet performance standards and safety regulations.