10+ Amazon Interview Questions and Answers

To line up the gauge glass in a steam drum, follow these steps:

• Ensure the steam drum is depressurized and cooled down

• Remove any obstructions or debris from the gauge glass openings

• Align the gauge glass with the corresponding openings on the steam drum

• Secure the gauge glass using appropriate gaskets and bolts

• Tighten the bolts evenly to ensure a proper seal

• Check for any leaks or abnormalities in the gauge glass

• If necessary, adjust the alignment by loosening and repositioning th...read more

Condition based monitoring analysis is crucial for maintenance in thermal power plants.

• Condition based monitoring involves analyzing data from various sensors to detect any abnormalities or potential failures in equipment.

• This analysis helps in predicting maintenance requirements and scheduling maintenance activities accordingly.

• Thermal power plants use various techniques such as vibration analysis, oil analysis, and thermography for condition monitoring.

• Regular maintenance a...read more

There are three types of lubrication: boundary, mixed, and hydrodynamic.

• Boundary lubrication occurs when there is direct contact between two surfaces and a lubricant is used to reduce friction.

• Mixed lubrication is a combination of boundary and hydrodynamic lubrication.

• Hydrodynamic lubrication occurs when a fluid film is created between two surfaces, reducing friction and wear.

• Examples of lubricants include oil, grease, and graphite.

• The type of lubrication used depends on the ...read more

Possible reasons for high tph plant but low productions.

• Inefficient equipment or machinery

• Poor maintenance of equipment

• Inadequate training of staff

• Lack of raw materials or supplies

• Issues with the production process

• Quality control problems

• Ineffective management or leadership

• Market demand or competition

• Environmental factors

• Logistical issues

TG interlock is a safety mechanism that prevents simultaneous operation of two or more circuit breakers.

• TG interlock ensures that only one circuit breaker can be closed at a time.

• It prevents damage to equipment and ensures safety of personnel.

• For example, if two circuit breakers are connected to the same transformer, TG interlock will prevent both breakers from being closed simultaneously.

• TG interlock is commonly used in power distribution systems.

• It is an important safety fe...read more

Low production can be caused by various factors.

• Inefficient production processes

• Lack of skilled workers

• Equipment breakdowns

• Low morale among workers

• Supply chain disruptions

• Inadequate raw materials

• Poor planning and scheduling

• Market demand fluctuations

Yes, it can be appropriate to deviate from the plan in certain situations.

• Deviation from the plan may be necessary when unforeseen circumstances arise.

• Flexibility is important in adapting to changing market conditions or customer needs.

• Deviation should be based on careful analysis and consideration of potential risks and benefits.

• Examples of appropriate deviation include adjusting strategies to address new competitors or changing consumer preferences.

The Vernier caliper is used to measure the length or diameter of an object in millimeters.

• The Vernier caliper has a main scale and a sliding Vernier scale.

• To measure an object, align it between the jaws of the caliper and read the measurement on the Vernier scale.

• The Vernier scale allows for more precise measurements than a regular ruler.

• Example: If the main scale reads 10 mm and the Vernier scale aligns with the 0.5 mm mark, the measurement is 10.5 mm.

To organize daily and weekly priorities, it is important to prioritize tasks, create a schedule, and regularly review and adjust priorities.

• Identify and prioritize tasks based on urgency and importance

• Create a schedule or to-do list to allocate time for each task

• Regularly review and adjust priorities based on changing circumstances

• Delegate tasks to appropriate team members if necessary

• Use tools or software to track and manage priorities

• Communicate priorities to team members a...read more

The data transfer speed of Profibus DP is up to 12 Mbps.

• Profibus DP uses a high-speed RS-485 physical layer

• The maximum cable length is 1200 meters

• It supports up to 126 devices on a single network

• It is commonly used in industrial automation applications

LRS stands for Load Rejection Switching and GRR stands for Grid Rejection Switching.

• LRS is a technique used to test the ability of a generator to withstand sudden load rejection.

• GRR is a technique used to test the ability of a generator to withstand sudden grid rejection.

• Both LRS and GRR are important tests for ensuring the reliability and stability of power systems.

• During LRS and GRR tests, the generator is disconnected from the load or grid, respectively, and the response o...read more

Fan's law states that the volume of air flow is directly proportional to the fan speed and the pressure difference.

• Fan's law is used to calculate the air flow rate in a ventilation system.

• It states that if the fan speed is doubled, the air flow rate will also double.

• Similarly, if the pressure difference is doubled, the air flow rate will also double.

• Fan's law is important in HVAC systems, where air flow rate is critical for maintaining indoor air quality and temperature.

• It ca...read more

Cement is a binding material used in construction to hold together other materials like bricks, stones, and concrete.

• Cement is made by heating limestone and clay in a kiln at high temperatures.

• It is commonly used in the construction of buildings, bridges, roads, and other infrastructure.

• There are different types of cement, such as Portland cement, which is the most commonly used type.

• Cement can also be mixed with water and other materials to create concrete.

• It is important to...read more

VFDs have limitations that can affect their performance and efficiency.

• VFDs can generate harmonic distortion that can damage other equipment in the system.

• VFDs can cause motor insulation breakdown due to voltage spikes.

• VFDs can produce electromagnetic interference that can affect other electronic devices.

• VFDs can be expensive to purchase and maintain compared to traditional motor starters.

• VFDs require specialized knowledge and training to install and operate effectively.