Electrical Engineer 2
Electrical Engineer 2 Interview Questions and Answers
Q1. what are all the breakers you know tell their uses and benefits?
Breakers are electrical switches that protect circuits from overloading and short circuits.
Circuit Breaker - protects circuits from overloading and short circuits
Ground Fault Circuit Interrupter (GFCI) - protects against electrical shock in wet areas
Arc Fault Circuit Interrupter (AFCI) - protects against electrical fires caused by arcing
Main Breaker - controls power to the entire electrical panel
Miniature Circuit Breaker (MCB) - protects individual circuits from overloading a...read more
Q2. do you know anything about starters where it used?
Starters are used to control the starting current of motors.
Starters are used to limit the inrush current during motor starting.
They protect the motor from damage due to high starting current.
Types of starters include direct-on-line, star-delta, and soft starters.
Starters are commonly used in industrial and commercial applications.
Examples of applications include pumps, fans, and conveyor belts.
Q3. which relay is used in our panel ?
I'm sorry, I don't have the available data to answer this question.
Q4. how do you size Transformer ?
Transformers are sized based on load requirements and voltage levels.
Determine the load requirements of the system
Calculate the required kVA rating based on the load requirements
Determine the voltage levels of the system
Select a transformer with a kVA rating and voltage levels that meet the requirements
Consider factors such as efficiency, temperature rise, and impedance when selecting a transformer
Q5. how do you do voltage drop?
Voltage drop is the reduction in voltage that occurs as electricity flows through a circuit due to resistance.
Calculate the total resistance of the circuit
Determine the current flowing through the circuit
Multiply the current by the total resistance to get the voltage drop
Use Ohm's Law (V=IR) to calculate voltage drop across individual components
Consider using voltage drop calculators or tables for more complex circuits
Q6. How to choose your cable ?
Choose cable based on voltage, current, temperature, environment and application.
Determine voltage and current requirements
Consider temperature range and environmental conditions
Choose cable type based on application (e.g. power, data, signal)
Select appropriate conductor material (e.g. copper, aluminum)
Check for any regulatory requirements or standards (e.g. NEC, UL)
Examples: THHN for indoor power, Cat6 for data transmission, coaxial for RF signals
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Q7. IEC codes and standards?
IEC codes and standards are international standards for electrical engineering.
IEC stands for International Electrotechnical Commission
IEC codes and standards ensure safety, reliability, and compatibility of electrical systems and equipment
Examples of IEC standards include IEC 60601 for medical electrical equipment and IEC 61850 for communication networks and systems in substations
Q8. how do you size DG ?
DG sizing depends on load demand, backup requirements, fuel availability, and budget.
Calculate the total load demand of the system
Determine the backup requirements and duration
Consider the availability of fuel and its cost
Evaluate the budget for the project
Select a DG with appropriate capacity and efficiency
Perform a feasibility study and cost-benefit analysis
Consider environmental regulations and noise restrictions
Ensure proper installation and maintenance
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