Electrical Testing Commissioning Engineer

Electrical Testing Commissioning Engineer Interview Questions and Answers

Updated 11 Jul 2025
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Q. What is a switchgear and what is a switchyard

Ans.

Switchgear is an electrical device used to control, protect, and isolate electrical equipment. Switchyard is an outdoor area where high-voltage electrical equipment is installed.

  • Switchgear is used to control and protect electrical equipment, such as transformers, generators, and motors.

  • It is designed to handle high voltages and currents and includes devices like circuit breakers, fuses, and relays.

  • Switchgear can be found in various settings, including power plants, substation...read more

Asked in Voltech

2d ago

Q. What is a motor, and can you provide some explanation about it?

Ans.

A motor is an electrical device that converts electrical energy into mechanical energy.

  • Motors are used in various applications such as fans, pumps, compressors, and conveyor systems.

  • They work on the principle of electromagnetic induction.

  • The two main types of motors are AC motors and DC motors.

  • AC motors are commonly used in household appliances while DC motors are used in electric vehicles and robotics.

  • Motors require regular maintenance to ensure optimal performance and longe...read more

3d ago

Q. What are your thoughts on electrical power systems?

Ans.

Electrical power systems are essential for distributing and managing electricity efficiently.

  • Electrical power systems consist of generators, transformers, transmission lines, and distribution networks.

  • They play a crucial role in supplying electricity to homes, businesses, and industries.

  • Proper design, installation, testing, and maintenance of electrical power systems are essential to ensure safety and reliability.

  • Issues such as voltage fluctuations, power outages, and equipme...read more

Asked in Flowmore

4d ago

Q. What types of relays are used in a substation?

Ans.

Different types of relays used in a substation include protective relays, auxiliary relays, and control relays.

  • Protective relays are used to detect abnormal conditions in the power system and initiate corrective actions.

  • Auxiliary relays are used for auxiliary functions such as interlocking, signaling, and indication.

  • Control relays are used to control the operation of various equipment in the substation.

  • Examples of relays used in a substation include differential relays, overc...read more

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6d ago

Q. What are the different types of circuit breakers?

Ans.

Types of breakers include circuit breakers, fuse breakers, and earth leakage circuit breakers.

  • Circuit breakers: Automatically switch off electrical circuits during abnormal conditions.

  • Fuse breakers: Use a fuse to interrupt the circuit when current exceeds a certain level.

  • Earth leakage circuit breakers: Detects leakage current and disconnects the circuit to prevent electric shock.

  • Examples: Miniature circuit breaker (MCB), Residual current circuit breaker (RCCB), Molded case ci...read more

4d ago

Q. What are your work abilities?

Ans.

An Electrical Testing Commissioning Engineer ensures electrical systems are installed, tested, and operationally ready for use.

  • Conducting tests on electrical systems to ensure compliance with specifications.

  • Performing inspections and troubleshooting to identify issues.

  • Coordinating with project teams to ensure timely completion of commissioning activities.

  • Documenting test results and preparing reports for stakeholders.

  • Example: Testing a new transformer installation for proper ...read more

Electrical Testing Commissioning Engineer Jobs

Talent Corner Hr Services logo
Electrical Testing And Commissioning Engineer 2-4 years
Talent Corner Hr Services
0.0
₹ 4 L/yr - ₹ 4 L/yr
South Goa

Asked in Flowmore

5d ago

Q. How can power factor be improved?

Ans.

Improving power factor involves reducing reactive power consumption and increasing the efficiency of the system.

  • Install power factor correction capacitors to offset reactive power

  • Upgrade to more efficient equipment to reduce reactive power consumption

  • Implement power factor correction techniques such as phase-shifting transformers

  • Regularly monitor and maintain power factor levels to ensure efficiency

  • Educate staff on the importance of maintaining a high power factor

4d ago

Q. Pn junction for 3 conditions

Ans.

Pn junction refers to the interface between a p-type and n-type semiconductor material, exhibiting different behaviors under forward bias, reverse bias, and breakdown conditions.

  • Under forward bias, electrons and holes are pushed towards the junction, allowing current to flow easily.

  • Under reverse bias, the junction acts as a barrier to current flow, with only a small leakage current passing through.

  • In breakdown condition, the reverse bias voltage is so high that the junction b...read more

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5d ago

Q. What are the company benefits?

Ans.

Company benefits include health insurance, retirement plans, paid time off, and professional development opportunities.

  • Health insurance coverage for employees and their families

  • Retirement plans such as 401(k) with employer matching

  • Paid time off for vacation, sick leave, and holidays

  • Professional development opportunities like training programs or tuition reimbursement

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