ABB
ABB is a leader in power and automation technologies.
Drafted with Aria, reviewed by the AiCanCode.org team. Spotted an error? Use Give Feedback at the bottom of the page.
Company context
ABB’s businesses cover electrification, motion and automation, including motors, drives, control and measurement technologies. Use the role description to choose the most relevant topics. Official company profile.
Selection preparation
Check the specific role’s official posting and recruiter instructions for eligibility and selection stages. Technical discussion, project explanation, aptitude and behavioral practice may be useful, but this guide does not verify a fixed sequence of company interview rounds.
What to revise
- Electric Circuits (whole subject)
- Electromagnetic Fields (whole subject)
- Signals & Systems (whole subject)
- Electrical Machines (whole subject)
- Power Systems (whole subject)
- Control Systems (whole subject)
- Measurements (whole subject)
- Analog & Digital Electronics (whole subject)
- Power Electronics (whole subject)
Original practice questions
These are preparation examples, not questions attributed to this employer.
What is the difference between a synchronous and an asynchronous motor? At fixed supply frequency, synchronous motors run at synchronous speed within their stable operating range. Wound-field types use DC excitation, but permanent-magnet and reluctance types do not; induction motors require slip to develop torque.
Explain the working principle of a transformer. A transformer operates on the principle of electromagnetic induction and is used to change the voltage level in an AC circuit. It consists of primary and secondary windings, and the voltage is transformed in proportion to the turns ratio.
What are the advantages of using a three-phase power system? Three-phase power systems are more efficient than single-phase systems, providing constant total instantaneous power for a balanced sinusoidal load and requiring less conductor material for the same amount of power.
How does a PID controller work in a control system? A PID controller uses proportional, integral, and derivative control actions to maintain the desired output of a system. It continuously calculates an error value and applies corrections based on these three parameters.
What is the purpose of a circuit breaker? A circuit breaker is a safety device designed to protect an electrical circuit from damage caused by overload or short circuit. It interrupts the flow of current when a fault is detected.
Describe the function of a rectifier. A rectifier converts alternating current (AC) to direct current (DC). It is commonly used in power supplies for electronic devices.
Before the interview
- Review your academic projects and internships, focusing on those related to power systems, control systems, or automation.
- Read about ABB's latest technologies and projects in power and automation sectors.
- Understand the company's core values and recent developments in the industry.
- Prepare to discuss how your skills and experiences align with ABB's work and mission.
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