30+ Adrenalin Esystems Interview Questions and Answers

APH leakage is a problem in boilers that can lead to reduced efficiency and increased emissions.

• APH stands for Air Preheater, which is used to heat the combustion air before it enters the boiler.

• Leakage in the APH can result in loss of heat and reduced efficiency.

• Identifying the leakage involves inspecting the APH for visible signs of damage or leakage, conducting pressure tests, and monitoring performance parameters.

• Common causes of APH leakage include worn-out seals, corros...read more

Dominant frequencies of 1×, 2×, and 3× RPM in the spectrum indicate faults in rotating equipment.

• 1× RPM indicates misalignment or unbalance

• 2× RPM indicates gear or bearing faults

• 3× RPM indicates resonance or coupling issues

Desuperheating line is used to reduce the temperature of superheated steam by injecting water or other cooling agents.

• Desuperheating line is typically located downstream of the superheater in a boiler system.

• It is used to control the temperature of the steam to prevent damage to downstream equipment.

• The location of the desuperheating line may vary depending on the specific boiler design and application.

• Examples of desuperheating systems include spray water, steam injection, a...read more

Diagnosing abnormal sound from mill motor without vibration analyzer

• Check for any visible signs of damage or wear on the motor and surrounding components

• Listen for any changes in the sound when the motor is turned off and on again

• Check the lubrication system and oil levels

• Inspect the belts and pulleys for any signs of wear or damage

• Consult with experts or manufacturers for further guidance

There are eight types of losses in a boiler.

• The eight types of losses in a boiler are: radiation, convection, exhaust, blowdown, incomplete combustion, unburnt fuel, ash, and moisture.

• Radiation loss occurs due to the heat radiated from the boiler's surface.

• Convection loss occurs due to the heat carried away by the flue gases.

• Exhaust loss occurs due to the heat carried away by the exhaust gases.

• Blowdown loss occurs due to the removal of hot water and steam from the boiler.

• Inco...read more

The height between Dearetor and BFP is important for boiler turbine efficiency, mill principle, and dosings in Dearetor and Boiler drum.

• The height ensures proper separation of steam and water in the deaerator.

• It allows for efficient operation of the boiler feed pump (BFP).

• The dosing of chemicals in the deaerator and boiler drum is optimized with the height difference.

• The mill principle is also affected by the height difference.

• Overall, the height between the deaerator and BFP...read more

The O2 analiger in a boiler is typically located in the flue gas stream.

• The O2 analiger is used to measure the oxygen content in the flue gas.

• It is important to monitor the oxygen levels in the flue gas to optimize combustion efficiency.

• The O2 analiger is usually installed in the boiler's flue gas duct or stack.

• It may be located at a specific distance from the boiler outlet to ensure accurate measurements.

• The O2 analiger may have a probe that extends into the flue gas stream ...read more

Drum pressure drops in the area of steam generation and distribution.

• Drum pressure drop can occur due to steam leakage in the distribution system.

• Pressure drop can also happen in the steam generation process, such as in the boiler or heat exchanger.

• Other factors that can cause drum pressure drop include fouling or scaling in the system.

• Monitoring and maintaining proper drum pressure is crucial for efficient and safe operation of the boiler system.

Types of losses in Boiler

• Heat loss through flue gases

• Heat loss through radiation and convection

• Incomplete combustion losses

• Blowdown losses

• Ash and unburnt losses

The Factory Act 1948 provides for various welfare provisions for workers in factories.

• Provision for cleanliness, ventilation, lighting, and drinking water

• Provision for safety measures like fencing of machinery, work on dangerous machines, and handling of hazardous substances

• Provision for welfare measures like canteens, restrooms, and first aid facilities

• Provision for working hours, overtime, and weekly holidays

• Provision for employment of young persons and women

• Provision for l...read more

Heat rate of a boiler is the amount of fuel energy input needed to produce one unit of net electrical power output.

• Heat rate is expressed in units of Btu/kWh or kcal/kWh.

• It is calculated by dividing the total fuel energy input by the net electrical power output.

• Factors affecting heat rate include boiler efficiency, turbine efficiency, and generator efficiency.

• Heat rate can be improved by optimizing combustion, reducing heat losses, and improving equipment performance.

• For exam...read more

Explanation of mill operating curve and its 6 constraints.

• Mill operating curve is a graph showing the relationship between production rate and mill load.

• The 6 constraints are: motor power, feed rate, critical speed, pulp density, mill size, and lifter height.

• Motor power is the maximum power that can be supplied to the mill.

• Feed rate is the maximum amount of material that can be fed into the mill.

• Critical speed is the speed at which the centrifugal force is equal to the gravit...read more

De-ashing process from ESP to silo involves several steps.

• The ash is collected in hoppers located at the bottom of the ESP.

• The ash is then transported to the silo using a pneumatic conveying system.

• The ash is stored in the silo until it can be disposed of properly.

• Regular maintenance of the ESP and pneumatic conveying system is necessary to ensure efficient de-ashing.

• Proper safety measures must be taken during the de-ashing process to prevent accidents.

Answering questions related to difficult maintenance activities and troubleshooting DE system issues.

• Performed difficult maintenance activities such as replacing a faulty gearbox in a wind turbine

• To physically find out if DE system is jammed, I would inspect the system for any blockages or obstructions

• If the bag on DE system is torn, I would conduct a visual inspection and check for any leaks or tears in the bag

PLF stands for Plant Load Factor. It is the ratio of actual power generated by a power plant to its maximum possible power generation.

• Improving maintenance and reducing downtime can increase PLF

• Upgrading equipment and technology can also improve PLF

• Optimizing fuel consumption and reducing fuel wastage can increase PLF

• Implementing energy-efficient practices can also improve PLF

• For example, a wind power plant can improve PLF by installing taller wind turbines or using more effi...read more

The process of deploying contract labour involves several steps such as identifying the need, selecting the vendor, negotiating terms, and monitoring performance.

• Identify the need for contract labour

• Select a vendor through a bidding process or referrals

• Negotiate terms and conditions of the contract

• Ensure compliance with legal and regulatory requirements

• Monitor the performance of the contract labour and vendor

• Terminate the contract when the need is fulfilled or if performance ...read more

Onan and ONAF are two cooling methods used in transformers.

• ONAN stands for Oil Natural Air Natural, while ONAF stands for Oil Natural Air Forced.

• ONAN is a self-cooling method where the transformer is cooled by natural convection of oil and air, while ONAF uses fans to force air over the transformer.

• ONAF is more efficient than ONAN, but also more expensive.

• ONAF is used in transformers where the ONAN method is not sufficient to dissipate the heat generated.

• The choice between ON...read more

Uncontrollable losses in boiler are those losses that cannot be controlled by the operator.

• Unburnt fuel losses

• Heat loss due to radiation and convection

• Moisture in fuel and combustion air

• Blowdown losses

• Losses due to incomplete combustion

• Losses due to excess air

• Losses due to soot and scale buildup

Centrifugal pump performance characteristics refer to the relationship between flow rate, head, power, and efficiency.

• Flow rate is the volume of fluid that passes through the pump per unit time.

• Head is the energy added to the fluid by the pump and is proportional to the pressure increase.

• Power is the energy required to operate the pump and is proportional to the flow rate and head.

• Efficiency is the ratio of the energy added to the fluid to the energy required to operate the p...read more

Rankine Cycle is a thermodynamic cycle used in steam power plants to convert heat energy into mechanical work.

• Rankine Cycle is a theoretical cycle that consists of four processes: compression, heat addition, expansion, and heat rejection.

• It is commonly used in steam power plants to generate electricity.

• The cycle begins with the compression of a working fluid (usually water) in a pump.

• The compressed fluid then enters a boiler where it is heated by the combustion of fuel.

• The hi...read more

The IR resistance of a motor refers to the insulation resistance, which measures the resistance of the insulation material surrounding the motor windings.

• IR resistance is measured in ohms and indicates the ability of the insulation to prevent current leakage.

• A higher IR resistance value indicates better insulation quality and less risk of electrical faults.

• Regular testing of IR resistance is important to ensure the motor's safety and reliability.

• For example, a motor with an I...read more

Boiler water & steam quality, cooling system & water consumption, coal analysis as per IS standard.

• Boiler water quality refers to the purity of water used in boilers to prevent corrosion and scale buildup.

• Steam quality is the measure of the amount of moisture in steam, with higher quality steam having less moisture.

• Cooling system quality control involves monitoring water quality to prevent fouling and corrosion in the system.

• Water consumption in cooling systems should be opti...read more

HP and KW are units of power measurement, with HP being the imperial unit and KW being the metric unit.

• HP stands for horsepower and is commonly used in the United States and other countries that use the imperial system of measurement.

• KW stands for kilowatt and is commonly used in countries that use the metric system of measurement.

• 1 horsepower is equal to 0.7457 kilowatts.

• The relationship between HP and KW is important in industries such as automotive and manufacturing, where...read more

The capacity of ESP hoppers varies depending on the size and model of the equipment.

• ESP hoppers can range from a few hundred cubic feet to several thousand cubic feet in capacity.

• The capacity can also depend on the type of material being collected in the hopper.

• It is important to regularly monitor and maintain the hopper to prevent overfilling and potential equipment damage.

Transformer simulation test is conducted to ensure the proper functioning of the transformer under different conditions.

• To verify the transformer's ability to withstand overloads and short circuits

• To determine the transformer's efficiency and voltage regulation

• To identify any potential issues with the transformer's insulation or winding

• To ensure the transformer meets industry standards and specifications

• Examples of tests include short circuit test, open circuit test, and load...read more

Balanced drought system is a water management system that balances water supply and demand during droughts.

• It involves managing water resources to ensure that there is enough water to meet the needs of all users during a drought.

• This can include measures such as water conservation, water recycling, and water transfers.

• The goal is to prevent water shortages and ensure that all users have access to water, even during times of drought.

• Examples of balanced drought systems include...read more

Parameters for clarified water include turbidity, pH, conductivity, and total dissolved solids.

• Turbidity should be less than 1 NTU

• pH should be between 6.5 and 8.5

• Conductivity should be less than 1000 µS/cm

• Total dissolved solids should be less than 500 mg/L

A motor is a device that converts electrical energy into mechanical energy, while MCB stands for Miniature Circuit Breaker used for electrical protection.

• Motor is a machine that converts electrical energy into mechanical energy

• MCB is a Miniature Circuit Breaker used for electrical protection

• Motors are commonly used in various applications such as fans, pumps, and conveyor belts

• MCBs are designed to automatically switch off electrical circuits in case of overload or short circu...read more

Types of motor devices include AC motors, DC motors, stepper motors, and servo motors.

• AC motors: commonly used in household appliances and industrial applications

• DC motors: used in battery-operated devices and automotive applications

• Stepper motors: used in precision positioning applications

• Servo motors: used in robotics and automation for precise control

PRV is used in transformers to regulate the voltage and protect the equipment from overvoltage.

• PRV stands for Pressure Relief Valve.

• It regulates the voltage and maintains it within safe limits.

• It protects the transformer from overvoltage and prevents damage to the equipment.

• PRV is installed on the transformer tank and is designed to release excess pressure in case of an overvoltage event.

• It is a safety feature that ensures the longevity and reliability of the transformer.

Job Hazard Analysis

• J.H.A stands for Job Hazard Analysis

• It is a process used to identify potential hazards in the workplace and determine the best way to eliminate or control them

• Involves breaking down a job into its individual tasks and identifying hazards associated with each task

• Examples include identifying risks of falls, exposure to harmful chemicals, or operating heavy machinery

DCP extinguisher stands for Dry Chemical Powder extinguisher.

• DCP extinguisher is a type of fire extinguisher that uses dry chemical powder to extinguish fires.

• It is commonly used for Class A, B, and C fires.

• DCP extinguishers are effective for fires involving flammable liquids, gases, and electrical equipment.

Turbine heat rate is the amount of fuel energy input required to produce one unit of electricity output.

• Turbine heat rate is calculated by dividing the total fuel energy input by the electricity output.

• It is usually expressed in British thermal units (BTUs) per kilowatt-hour (kWh).

• Lower the heat rate, higher the efficiency of the turbine.

• Factors affecting heat rate include turbine design, fuel quality, and operating conditions.

• For example, a gas turbine with a heat rate of 7,...read more

Control Loop system is a system that automatically controls a process variable to a desired set point.

• Control Loop system consists of a controller, process variable, set point, and final control element.

• Examples include PID control loops used in temperature control systems.

• Control Loop systems help maintain stability and accuracy in industrial processes.

The process of plant involves various steps from raw material intake to final product delivery.

• Raw material intake and inspection

• Processing and manufacturing

• Quality control and testing

• Packaging and labeling

• Storage and inventory management

• Delivery and logistics

Safety full form is Security and Accident-Free Environment for You

• Safety stands for Security and Accident-Free Environment for You

• It is a set of practices and procedures implemented to prevent accidents, injuries, and hazards in the workplace

• Safety measures can include training programs, safety equipment, emergency response plans, and regular inspections

• Examples of safety practices include wearing personal protective equipment, following proper procedures for handling hazardo...read more

Safety R.A stands for Safety Risk Assessment.

• Safety R.A is a process of identifying, analyzing, and evaluating potential risks in a workplace or environment.

• It helps in determining the likelihood of an incident occurring and the potential consequences.

• Safety R.A involves assessing hazards, determining risk levels, and implementing control measures to mitigate risks.

• Examples of Safety R.A include conducting job hazard analysis, safety audits, and safety inspections.