Armstrong Robotics & Technologies Private Limited Electrical Supervisor Interview Questions and Answers

Q1. Types of MCB ??
Ans. 
Miniature Circuit Breaker (MCB) is a type of circuit breaker that automatically switches off electrical circuits during abnormal conditions.
• Types of MCB include single pole MCB, double pole MCB, triple pole MCB, and four pole MCB

• MCBs can also be classified based on their breaking capacity, such as B, C, D, and K types

• Some examples of MCB manufacturers are Schneider Electric, Siemens, ABB, and Legrand
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Q1. What is the VFD
Ans. 
VFD stands for Variable Frequency Drive, used to control the speed of an AC motor by varying the frequency and voltage supplied to the motor.
• VFDs are commonly used in industrial applications to control pumps, fans, and other motor-driven equipment.

• They can improve energy efficiency by adjusting motor speed to match the required load.

• VFDs can also provide better control over motor acceleration and deceleration, reducing...read more
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Q2. What is the role of an Online Learning Resource (OLR)?
Ans. 
OLRs provide access to educational materials and resources online for self-paced learning.
• Provide access to a wide range of educational materials and resources

• Allow for self-paced learning and flexibility in studying

• Can include videos, interactive quizzes, readings, and other multimedia content

• Enable learners to access information anytime, anywhere with an internet connection

• Can be used for professional development or
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Q1. What is the rccb
Ans. 
RCCB stands for Residual Current Circuit Breaker, a device designed to quickly disconnect power in the event of a leakage current.
• RCCB is a safety device used to protect against electric shock and fire hazards.

• It detects any imbalance in the electrical current flowing through the circuit.

• When a leakage current is detected, the RCCB trips and disconnects the power supply.

• RCCBs are commonly used in residential, commercia...read more
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Q2. Which place use star delta connection
Ans. 
Star delta connection is commonly used in high-power industrial applications to reduce starting current.
• High-power industrial applications

• Motors with high starting current

• Applications where smooth starting is required
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Q1. What is your work Nature
Ans. 
As an Electrical Design Engineer, I focus on creating and optimizing electrical systems and components for various applications.
• Design electrical circuits and systems, such as power distribution networks.

• Use software tools like AutoCAD and MATLAB for simulations and designs.

• Collaborate with cross-functional teams to ensure design feasibility.

• Conduct testing and troubleshooting of electrical systems to ensure compliance...read more
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Q2. Describe your technical knowledge
Ans. 
I possess extensive knowledge in electrical design, including circuit analysis, power systems, and compliance with industry standards.
• Proficient in circuit design using software like AutoCAD and MATLAB.

• Experience in power distribution systems, ensuring efficiency and reliability.

• Knowledge of industry standards such as IEC, IEEE, and NEC for compliance.

• Skilled in troubleshooting and optimizing electrical systems for per...read more
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The first round was a gamified aptitude test, and shortlisting was conducted based on sectional cutoffs. Female candidates were given higher preference.

Q1. Basic questions on Transformer
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Q2. Working of circuit Breakers and relays
Ans. 
Circuit breakers are devices that automatically stop the flow of electricity when a fault is detected, while relays are switches that open or close circuits based on electrical signals.
• Circuit breakers are designed to protect electrical circuits from damage caused by overcurrent or short circuits.

• They work by detecting abnormal current flow and quickly interrupting the circuit to prevent damage.

• Relays are electromechan...read more
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Q3. What is corona loss, insulators, Ferranti effect and all the basics of ETD
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Q4. What is a Buchholz relay and how does it work?
Ans. 
A Buchholz relay is a protective device used in oil-filled transformers to detect and prevent internal faults.
• Detects faults such as insulation breakdown or arcing within the transformer

• Consists of a float switch connected to an alarm or trip circuit

• When gas or oil accumulates due to a fault, the float rises and triggers the alarm or trip signal

• Helps prevent major damage to the transformer by isolating it from the powe
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Q5. Principle of Induction motor and what is mutual inductance
Ans. 
Induction motor operates on the principle of electromagnetic induction. Mutual inductance is the measure of the coupling between two coils.
• Induction motor works on the principle of electromagnetic induction where a rotating magnetic field is produced to induce current in the rotor, causing it to rotate.

• Mutual inductance is the measure of the coupling between two coils, indicating how much of the magnetic field produced...read more
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About power system control system

Present trends and tgey willgive 10 min to think and note down

Q1. About resume get good knowledge of what you have put in resume
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Q2. And basic electricals
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Q1. What is fermentation
Ans. 
Fermentation is a metabolic process that produces chemical changes in organic substrates through the action of enzymes.
• Fermentation is a metabolic process that converts carbohydrates, such as sugars and starches, into alcohol or organic acids using microorganisms like yeast or bacteria.

• Common examples of fermentation include the production of beer, wine, yogurt, and bread.

• Fermentation is used in various industries such...read more
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Q1. Power factor correction
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Q2. Working of circuit breaker
Ans. 
Circuit breakers are electrical switches designed to protect electrical circuits from damage caused by overload or short circuit.
• Circuit breakers automatically trip when they detect an overload or short circuit in the electrical system.

• They interrupt the flow of electricity to prevent damage to the circuit or electrical devices.

• Circuit breakers can be reset manually after tripping to restore power to the circuit.

• There ...read more
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Q1. Question on Autocad
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Q2. Question on Automatic Transfer Switch
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Q3. Typer of Automatic Transfer switch
Ans. 
Automatic Transfer Switches are devices used to automatically switch power sources in case of a power outage.
• Types of automatic transfer switches include open transition, closed transition, and delayed transition.

• Examples of automatic transfer switch manufacturers include Generac, Eaton, and Schneider Electric.

• Automatic transfer switches are commonly used in backup power systems for critical facilities like hospitals,
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Q4. Purge command, layers
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Q5. Load bank related questions
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