Qcon-Qatar Engineering & Construction Electrical Technician Interview Questions and Answers

The test is very difficult you have to complete all 20 questions which consist GC , subject related

Q1. What is the wave trape?
Ans. 
A wave trap is a device used in electrical engineering to prevent unwanted signals or frequencies from entering a system.
• Wave traps are typically used in power systems to filter out specific frequencies that can cause interference.

• They are designed to allow only desired signals to pass through while blocking unwanted signals.

• Wave traps can be used in substations, transmission lines, and other electrical systems to impr...read more
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Q2. Which types of circuit breaker use in substation
Ans. 
Types of circuit breakers used in substations include air circuit breakers, oil circuit breakers, vacuum circuit breakers, and SF6 circuit breakers.
• Air circuit breakers are commonly used in low voltage applications.

• Oil circuit breakers are used in high voltage applications.

• Vacuum circuit breakers are compact and reliable, suitable for medium voltage applications.

• SF6 circuit breakers are used in high voltage substations
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Global warming ,covid-19, current affairs

Q1. Earthing design
Ans. Explain Earthing design using excel or any earthing design software
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Q2. Cable Sizing calculation
Ans. Explain step by step procedure of Cable Sizing
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Q3. How to handle designers in tough time
Ans. 
Communicate openly, provide support, set clear expectations, offer solutions
• Communicate openly with designers to understand their challenges and concerns

• Provide support and resources to help designers overcome tough times

• Set clear expectations and goals to keep designers focused and motivated

• Offer solutions and brainstorm ideas together to find the best way forward
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Q4. Explain your individual contribution to the project
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Q1. Transformer tests
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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 the voltage in an electrical circuit.

• They consist of two or more coils of wire, known as windings, that are wound around a core made of magnetic material.

• The primary winding is connected to the power source, while the secondary winding is con...read more
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Q2. What is motor and principles?
Ans. 
A motor is a device that converts electrical energy into mechanical energy based on the principles of electromagnetism.
• A motor consists of a rotor and a stator.

• When an electric current flows through the stator windings, it creates a magnetic field.

• The interaction between the magnetic field and the rotor's magnetic field causes the rotor to rotate.

• Motors can be classified into various types such as DC motors, AC motors,...read more
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Q3. What is MCB and use?
Ans. 
MCB stands for Miniature Circuit Breaker. It is an electrical switch designed to protect an electrical circuit from damage caused by overload or short circuit.
• MCB is a type of circuit breaker that automatically switches off the electrical circuit when it detects an overload or short circuit.

• It is commonly used in residential, commercial, and industrial electrical installations.

• MCBs are more compact and efficient compar...read more
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Q4. How to handle in construction line?
Ans. 
Handling in construction line involves effective planning, communication, problem-solving, and coordination.
• Develop a detailed project plan and schedule to ensure smooth execution.

• Communicate effectively with team members, contractors, and clients to ensure everyone is on the same page.

• Identify and solve problems promptly to avoid delays and cost overruns.

• Coordinate with different stakeholders, such as architects, engi...read more
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Q5. What is DG and principles
Ans. 
DG stands for Diesel Generator. It is a backup power source that uses diesel fuel to generate electricity.
• DG is an acronym for Diesel Generator.

• It is commonly used as a backup power source in case of power outages.

• DGs are often used in industries, commercial buildings, hospitals, and residential complexes.

• They work on the principle of converting diesel fuel into mechanical energy, which is then converted into electrica...read more
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Q1. Self introduction & previous company experience
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Q1. What need you about T/F?
Ans. 
T/F stands for Transformer, which is a device used to transfer electrical energy between two or more circuits through electromagnetic induction.
• T/F stands for Transformer, a device that changes the voltage of an alternating current in an electrical circuit.

• Transformers are essential in power distribution systems to step up or step down voltage levels as needed.

• They work on the principle of electromagnetic induction, wh...read more
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Q2. Whate is megar?
Ans. 
Megger is a portable instrument used to measure the insulation resistance of electrical equipment.
• Megger is used to test the insulation resistance of wires, cables, transformers, and electrical motors.

• It helps in identifying any insulation breakdown or faults in the equipment.

• The instrument applies a high voltage to the equipment and measures the resistance to current flow.

• Megger readings are typically measured in mega
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Q3. What is multimeter?
Ans. 
A multimeter is a versatile tool used to measure voltage, current, and resistance in electrical circuits.
• A multimeter typically has a digital display to show the measured values

• It can measure AC and DC voltage, current, resistance, and sometimes other parameters like capacitance and frequency

• Multimeters have different settings for different types of measurements, such as voltage, current, and resistance

• They often have ...read more
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Q1. What is System studies
Ans. 
System studies involve analyzing and evaluating the performance of electrical systems to ensure efficiency and reliability.
• System studies involve analyzing the behavior of electrical systems under different operating conditions.

• They help identify potential issues and optimize the performance of the system.

• Examples of system studies include load flow analysis, short circuit analysis, and protection coordination studies.
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Q2. What is load flow study
Ans. 
Load flow study is a method used in electrical engineering to analyze and calculate the flow of power in an electrical network.
• Load flow study helps in determining the steady-state operating conditions of a power system.

• It involves calculating the voltage magnitude and phase angle at each bus in the network.

• The study considers factors like power generation, transmission line losses, and load demand.

• It helps in identify...read more
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Q1. What is the procedure for selection of material, calculations and realtime experience on projects.
Ans. 
The procedure for material selection, calculations, and real-time experience in projects involves thorough research, analysis, and testing.
• Research different materials based on project requirements and constraints

• Perform calculations to determine material properties, dimensions, and feasibility

• Conduct tests and simulations to validate material selection and design choices

• Gain real-time experience through hands-on proje...read more
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