Ecoppia Senior Electrical Engineer Interview Questions and Answers

Q1. What is the VFD
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Q2. What is the role of an Online Learning Resource (OLR)?
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Q1. What is the rccb
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Q2. Which place use star delta connection
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Q1. What is your experience.
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Q2. What is your salary expectation
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Q1. Transformers working principle
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Q2. Different type of sensors
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Q1. Draw the star delta controlling
Ans. 
Star delta controlling is a method used to reduce the starting current of induction motors.
• Star delta controlling involves initially connecting the motor windings in a star configuration for starting, then switching to a delta configuration for running.

• It is commonly used for large induction motors to reduce the starting current and torque.

• The transition from star to delta configuration is typically controlled by a mot...read more
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Q2. How many contactor use in star delta??
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In star delta connection, typically two contactors are used.
• In star delta connection, one contactor is used for star connection and another contactor is used for delta connection.

• The star contactor is typically rated for the current of one winding, while the delta contactor is rated for the full motor current.

• Using two contactors helps in reducing the starting current and torque in the motor.

• For example, a 3-phase moto...read more
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Q3. Draw the single line diagram for DOL.
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Single line diagram for DOL is a simple representation of Direct-On-Line motor starter circuit.
• DOL starter consists of a contactor, overload relay, and start/stop push buttons.

• The single line diagram shows the connections between these components.

• The power supply is connected to the contactor, which is then connected to the motor.

• The overload relay is connected in series with the motor to protect it from overloading.

• St...read more
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Q1. Introduction your self
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I am an experienced Electrical Engineer with expertise in designing and implementing electrical systems.
• I have a Bachelor's degree in Electrical Engineering from XYZ University.

• I have worked for 5 years at ABC Company, where I designed and implemented electrical systems for commercial buildings.

• I am proficient in using CAD software for creating electrical schematics and layouts.

• I have experience in troubleshooting and ...read more
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Q2. Technical answer
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Q3. What is oms law What resistance unit
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Ohm's Law is a fundamental principle in electrical engineering that relates the current flowing through a conductor to the voltage across it and the resistance of the conductor.
• Ohm's Law states that the current (I) flowing through a conductor is directly proportional to the voltage (V) across it and inversely proportional to the resistance (R) of the conductor.

• The formula for Ohm's Law is: V = I * R, where V is the vol...read more
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Q4. What's current unit
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The current unit is the ampere (A), which measures the flow of electric charge.
• The ampere is named after the French physicist André-Marie Ampère.

• Current is the rate at which electric charge flows through a conductor.

• Other common units for current include milliamperes (mA) and microamperes (μA).
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Q5. Write the voltage unit
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The voltage unit is measured in volts (V).
• The voltage unit is denoted by the symbol V.

• Voltage is the potential difference between two points in an electrical circuit.

• Common examples of voltage units include millivolts (mV), kilovolts (kV), and megavolts (MV).
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Q1. How many years experience in electrical technician in India
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Q2. Dubai UAE all futain
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Q3. Johnson controls Chennai oragadam
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Q4. Melcon private limited Chennai
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How to make new project in R&D

Q1. All smart City Device configuration
Ans. 
Smart City Device configuration involves setting up various sensors, communication protocols, and data management systems to enable efficient city operations.
• Configure sensors for monitoring traffic flow, air quality, noise levels, etc.

• Implement communication protocols such as LoRaWAN, NB-IoT, or WiFi for data transmission.

• Set up data management systems like cloud platforms or edge computing for processing and analyzin
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Q1. Introduction in the technical My self Suneel meena for electrical engineering rtu kota 67.28 % My b.tech electrical engineering my b.tech complete in 2021 and i have work in 132 kv sub station bhar...read more
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Q2. Tell me about my self
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Q3. Introduction in my self
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Q1. Basic of PLC & VFD with working principle.
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Q2. Why soft starter use against star -delta starter for motor start & run .
Ans. 
Soft starters are preferred over star-delta starters for motor start and run due to their ability to reduce inrush current and provide smoother acceleration.
• Soft starters provide a gradual increase in voltage to the motor, reducing inrush current and mechanical stress on the motor.

• Star-delta starters provide a sudden increase in voltage, resulting in high inrush current and mechanical stress on the motor.

• Soft starters ...read more
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Q1. Types of encoders used in industrial.
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Encoders used in industrial include absolute, incremental, linear, rotary, magnetic, and optical encoders.
• Absolute encoders provide a unique code for each position

• Incremental encoders provide a pulse output for each position change

• Linear encoders measure linear motion

• Rotary encoders measure rotational motion

• Magnetic encoders use a magnetic field to detect position

• Optical encoders use light to detect position
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Q2. What are the VFD parameters?
Ans. 
VFD parameters are settings that control the operation of a variable frequency drive.
• VFD parameters include frequency, voltage, current, acceleration/deceleration time, and motor overload protection

• Frequency parameter determines the speed of the motor

• Voltage parameter determines the amount of voltage supplied to the motor

• Current parameter determines the amount of current supplied to the motor

• Acceleration/deceleration t...read more
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Q1. Why left the previous company ?
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Q2. How the culture of previous company?
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