Voltas

Company context

Voltas is a prominent engineering solutions provider that specializes in air conditioning and cooling technology. They are involved in the design, manufacturing, and servicing of a wide range of products, including HVAC systems, refrigeration units, and other cooling solutions. Electrical Engineering graduates may find opportunities in areas such as product design, system integration, and maintenance of electrical components within these systems.

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.

1. What is the principle of operation of a transformer? A transformer operates on the principle of electromagnetic induction and is used to change the voltage levels in an AC circuit. It consists of primary and secondary windings and works by transferring electrical energy between the two through a magnetic field.

2. Explain the difference between a synchronous and an asynchronous motor. A synchronous motor operates at a constant speed up to its full load and is synchronized with the frequency of the supply current. An asynchronous motor, or induction motor, does not run at synchronous speed and its speed decreases with an increase in load.

3. What are the advantages of using a three-phase power system over a single-phase system? A three-phase power system is more efficient than a single-phase system because a balanced sinusoidal three-phase load receives constant total instantaneous power, reduces conductor material, and provides a smoother and more reliable power supply.

4. How do you determine the size of a cable for a particular load? The size of a cable is determined based on the current-carrying capacity, voltage drop, and short-circuit rating. Factors such as the length of the cable, ambient temperature, and installation conditions are also considered.

5. What is the role of a capacitor in an electrical circuit? A capacitor stores electrical energy in an electric field and is used to block DC while allowing AC to pass, filter signals, and stabilize voltage and power flow in electrical circuits.

6. Describe the working principle of a circuit breaker. A circuit breaker is a protective device that automatically interrupts the flow of current in a circuit when it detects an overload or short circuit. It works by separating the contacts within the breaker to stop the current flow.

Before the interview

• Review and update your resume with relevant projects and internships.
• Prepare to discuss any hands-on experience with electrical systems or HVAC technology.
• Research Voltas' recent projects, technological advancements, and market position.
• Be ready to explain how your skills and experiences align with the company's needs.
• Practice common interview questions and conduct mock interviews to improve your confidence.

Official company information.