Al-Jazeera Senior Engineer Interview Questions and Answers

How to handle emergency.

Q1. Boiler light up sop
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Q2. Turbine rolling procedure
Ans. 
Turbine rolling procedure involves carefully starting and stopping the turbine to prevent damage.
• Ensure proper lubrication of bearings before starting the turbine.

• Gradually increase the speed of the turbine to prevent sudden stress on the components.

• Monitor temperature and vibration levels during the rolling procedure.

• Follow manufacturer's guidelines for specific turbine rolling procedures.

• Perform regular maintenance c...read more
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Q1. Design a system like youtube
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Design a system similar to YouTube for video sharing and streaming
• Implement user authentication and authorization for uploading and viewing videos

• Create a database to store video metadata, user information, and comments

• Develop a recommendation algorithm based on user preferences and viewing history

• Utilize a content delivery network (CDN) for efficient video streaming

• Include features like video monetization, live stream...read more
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Q1. Project related
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Q1. Scenario based question on kafka
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Kafka is a distributed streaming platform used for building real-time data pipelines and streaming applications.
• Kafka uses a publish-subscribe model for messaging, allowing multiple producers and consumers.

• Topics in Kafka are partitioned for scalability; for example, a topic with 3 partitions can handle 3 consumers simultaneously.

• Kafka ensures message durability through replication; if one broker fails, others can stil...read more
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Q1. Dg change over panal reading
Ans. 
The reading on the DG changeover panel indicates the status of the diesel generator system.
• The reading on the panel will show which power source (main or backup) is currently supplying electricity.

• It may also display information about the load on the generator and any alarms or warnings.

• Regularly monitoring the panel reading is important to ensure smooth operation of the generator system.
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Q2. Ahu maintenance ke side se
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Q1. Ahu solar panel
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Q2. Plc and working dol starter
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Q1. What is the method for calculating the fault current of a VCB breaker?
Ans. 
Calculating fault current for a VCB involves system parameters, fault impedance, and breaker ratings.
• Identify the system voltage and configuration (e.g., three-phase, single-phase).

• Determine the source impedance (Zs) and load impedance (Zl).

• Calculate the fault impedance (Zf), which may be negligible in short-circuit conditions.

• Use the formula: Fault Current (If) = Voltage (V) / Total Impedance (Zs + Zl + Zf).

• Example: F...read more
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Q2. What type of breaker do you prefer for high voltage (HV) and low tension (LT) sides along with protection features?
Ans. 
For HV, I prefer SF6 circuit breakers; for LT, MCBs or MCCBs are ideal, each with specific protection features.
• HV Side: SF6 Circuit Breakers - Excellent insulation and arc-extinguishing properties.

• LT Side: MCBs - Protect against overload and short circuits, ideal for residential applications.

• LT Side: MCCBs - Provide adjustable settings for overload protection, suitable for industrial use.

• Protection Features: Earth Faul...read more
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Q3. How do you manage voltage optimization?
Ans. 
Voltage optimization involves adjusting voltage levels to improve efficiency and reduce energy consumption in electrical systems.
• Conduct a voltage audit to identify areas of over-voltage.

• Implement voltage regulation devices like transformers or capacitors.

• Use smart grid technology for real-time voltage monitoring.

• Example: Installing a voltage optimizer can reduce energy costs by 10-15%.

• Regular maintenance and monitorin...read more
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Q1. What is the transformer
Ans. 
A transformer is an electrical device that transfers electrical energy between two or more circuits through electromagnetic induction.
• Transformers are used to increase or decrease voltage levels in electrical circuits.

• They consist of two coils of wire, known as the primary and secondary coils.

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

• The changing magnetic field i...read more
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Q2. What is ACB and it how to work
Ans. 
ACB stands for Air Circuit Breaker, which is a type of circuit breaker that operates in the air as an arc extinguishing medium.
• ACB is used to protect electrical circuits from overloads and short circuits by automatically disconnecting the power supply when a fault is detected.

• It consists of a set of contacts that open and close to interrupt the flow of current in the circuit.

• ACBs are commonly used in industrial and com...read more
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Q3. Let me DG Safety device
Ans. 
DG Safety device is a safety device used to protect diesel generators from damage or malfunction.
• DG Safety device monitors parameters like temperature, oil pressure, and voltage to ensure safe operation.

• It can automatically shut down the generator in case of any abnormal readings to prevent damage.

• Examples of DG Safety devices include automatic voltage regulators, engine control modules, and temperature sensors.
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Q4. What is transformer safety
Ans. 
Transformer safety refers to measures taken to prevent accidents and ensure the proper functioning of transformers.
• Regular maintenance checks to identify any potential issues

• Proper grounding to prevent electrical shocks

• Using protective equipment when working with transformers

• Following safety guidelines and protocols

• Installing safety devices such as pressure relief valves

• Training employees on safe handling and operation...read more
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