ABB Diploma Trainee Engineer Interview Questions and Answers

Technical + general aptitude questions , , ,Control system based questions, degree level questions were few

Q1. Related to basics of Transformer
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Q2. Switchgear questions
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Q3. Why electrical engineering
Ans. 
I chose electrical engineering because of my fascination with electricity and its applications in modern technology.
• I have always been interested in how electricity works and how it powers our daily lives.

• I enjoy learning about the latest advancements in electrical technology and how they can be applied to solve real-world problems.

• Electrical engineering offers a wide range of career opportunities, from designing and b...read more
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Q4. Internship / work experience related questions
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Q5. Different types of protection schemes
Ans. 
Protection schemes are used to safeguard electrical equipment from damage due to faults or abnormal conditions.
• Overcurrent protection

• Earth fault protection

• Differential protection

• Distance protection

• Under/overvoltage protection

• Reverse power protection

• Frequency protection

• Generator protection

• Transformer protection
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Q1. What is transformer?
Ans. 
A transformer is a static electrical device that transfers electrical energy between two or more circuits through electromagnetic induction.
• Consists of two or more coils of insulated wire wound around a core

• Primary coil receives electrical energy and induces a magnetic field in the core

• Secondary coil receives the magnetic field and converts it back into electrical energy

• Used in power distribution, voltage regulation, a...read more
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Q2. What is transformer principle?
Ans. 
Transformer principle is based on the phenomenon of electromagnetic induction, where changing magnetic field induces voltage in a coil.
• Transformers work on the principle of electromagnetic induction

• They consist of two coils, primary and secondary, linked by a magnetic core

• When alternating current flows through the primary coil, it creates a changing magnetic field

• This changing magnetic field induces a voltage in the se...read more
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Asks general questions about related branch

Q1. Just asks about technical knowledge and branch related questions
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Q2. What is the use of bearing
Ans. 
Bearings are used to reduce friction between moving parts and support rotating or sliding components.
• Bearings help in reducing friction between moving parts

• They support rotating or sliding components

• Bearings help in maintaining proper alignment and positioning of the components

• They help in reducing wear and tear on the components

• Bearings are used in various applications such as automotive, industrial machinery, and hou
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Q1. Asks you about company and willingness to work in company
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Written test will be conducted

Q1. Based on your interest subject in engineering steam, and relevant to job location
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One liner mostly from rcc and BMC

Q1. Type of cement, initial and final setting time of concrete
Ans. 
Type of cement affects initial and final setting time of concrete.
• Different types of cement have different setting times.

• For example, rapid hardening cement has a shorter setting time than ordinary Portland cement.

• Initial setting time is the time taken for the cement to harden after mixing with water.

• Final setting time is the time taken for the cement to completely harden and gain strength.

• Setting time can be affected ...read more
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