10+ Amazon Interview Questions and Answers

The pitch system in engineering controls the angle of the blades on a wind turbine or aircraft to optimize performance.

• Pitch system adjusts blade angle to control speed and power output

• Can be controlled manually or automatically based on wind conditions

• Diagram should show blades connected to pitch system and control mechanism

Power can be converted and matched to grid parameters using power converters and control systems.

• Use power converters such as inverters to convert power from DC to AC or vice versa.

• Implement control systems to ensure the converted power matches the grid parameters.

• Adjust parameters such as voltage, frequency, and phase angle to match the grid requirements.

• Utilize communication protocols like Modbus or DNP3 for grid integration.

• Perform testing and validation to ensure complian...read more

The Pitch system in Gearless technology controls the angle of the blades to optimize energy production.

• Pitch system adjusts the angle of the blades based on wind conditions to maximize energy output.

• It helps in protecting the turbine from damage during high wind speeds by adjusting the blade angle.

• Pitch system can be controlled manually or automatically depending on the turbine design.

• Examples of Pitch system in action can be seen in wind turbines where the blades adjust thei...read more

Enercon Turbines have different models based on size, capacity, and technology.

• E-48/800 kW - small size, suitable for low wind speed areas

• E-82/2 MW - medium size, suitable for moderate wind speed areas

• E-126/7.5 MW - large size, suitable for high wind speed areas

• Different models have varying rotor diameters, hub heights, and power outputs

The performance of a turbine is evaluated by measuring key parameters such as efficiency, power output, and heat rate.

• Efficiency is calculated by dividing the actual power output by the theoretical power output.

• Power output is measured in kilowatts or megawatts.

• Heat rate is the amount of fuel required to produce a unit of electricity.

• Performance can also be evaluated by monitoring vibration levels, temperature, and pressure.

• Regular maintenance and tuning can improve turbine p...read more

I have solved errors related to software bugs, hardware malfunctions, calibration issues, and communication failures on the machine.

• Software bugs: Debugging code to fix issues with program logic or functionality.

• Hardware malfunctions: Repairing or replacing faulty components to restore machine operation.

• Calibration issues: Adjusting settings to ensure accurate measurements or performance.

• Communication failures: Troubleshooting network connections or data transfer problems.

• Exa...read more

Power flow & Control flow of Enercon WEC involves the generation of electricity from wind energy and the management of power output.

• Power flow in Enercon WEC involves converting kinetic energy from wind into electrical power through the rotation of the turbine blades.

• Control flow includes monitoring wind speed, adjusting blade pitch angle, and regulating generator output to optimize power generation.

• Enercon WECs use advanced control systems to ensure efficient power flow and ...read more

The Present LPA refers to the current annual salary of the individual.

• Present LPA stands for Present Last Payable Amount.

• It is the current annual salary of the individual.

• It is important for employers to know the Present LPA of potential employees to determine salary expectations.

• Candidates can negotiate their salary based on their Present LPA.

The expected LPA (Lakhs Per Annum) is the average annual salary that an engineer can expect to earn.

• The expected LPA can vary based on factors such as experience, education, industry, and location.

• For example, a fresh graduate engineer may have an expected LPA of 3-6 lakhs, while a senior engineer with years of experience may have an expected LPA of 10-20 lakhs.

• Engineers working in industries like IT or oil and gas tend to have higher expected LPA compared to engineers in oth...read more

Excitation starts by applying a voltage to the field winding of the generator.

• Excitation starts by applying a voltage to the field winding of the generator.

• This voltage creates a magnetic field in the generator's rotor.

• The magnetic field induces a voltage in the stator windings, which generates electricity.

• Excitation can be achieved through various methods such as self-excitation, separate excitation, or permanent magnet excitation.

The E48 turbine uses optical communication for data transmission.

• Optical communication involves using light to transmit data instead of electrical signals.

• Fiber optic cables are commonly used in optical communication for their high bandwidth and low interference.

• Optical communication in the E48 turbine may be used for monitoring and controlling various parameters such as temperature, pressure, and speed.