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Steag Energy Services Interview Questions and Answers

Updated 5 Feb 2024

Q1. APH leakage what type problem in Boiler and identify of leakage .

Ans.

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

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Q2. Desuperheting line identify and which location.

Ans.

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

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Q3. There are eight types loss in Boiler

Ans.

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

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Q4. O2 analiger location in Boiler

Ans.

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

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Q5. Drum pressure which area drop

Ans.

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.

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Q6. Types of losses in Boiler

Ans.

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

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