Pitti Engineering Junior Engineer Electrical Interview Questions and Answers for Freshers

It's basic level of questions you don't have panic give it with positive attitude.questions are asked from time and work, coding decoding, basic verbal questions and profit loss

Q1. What is transformer
Ans. 
A transformer is a device that transfers electrical energy between two or more circuits through electromagnetic induction.
• Transformers are used to increase or decrease voltage levels in electrical circuits.

• They consist of two coils of wire, known as the primary and secondary coils, wrapped around a core.

• Step-up transformers increase voltage levels, while step-down transformers decrease voltage levels.

• Transformers are e...read more
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Q2. What is the type of motor
Ans. 
The type of motor refers to the classification based on the design and operation of the motor.
• There are various types of motors such as DC motors, AC motors, synchronous motors, induction motors, etc.

• The type of motor is determined by factors like the power source, speed control, and construction.

• Each type of motor has its own advantages and applications in different industries.

• For example, DC motors are commonly used ...read more
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Q1. What is transformer?
Ans. 
A transformer is a device that transfers electrical energy between two or more circuits through electromagnetic induction.
• Consists of two coils of wire, known as primary and secondary coils

• Primary coil receives electrical energy and creates a magnetic field

• Magnetic field induces a voltage in the secondary coil, transferring energy

• Used to step up or step down voltage in power distribution systems

• Examples include power t...read more
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Q2. Types of transformer?
Ans. 
Types of transformers include step-up, step-down, isolation, autotransformer, and instrument transformer.
• Step-up transformer increases voltage

• Step-down transformer decreases voltage

• Isolation transformer provides electrical isolation between primary and secondary windings

• Autotransformer has a single winding with multiple taps

• Instrument transformer is used for measuring current or voltage in high voltage circuits
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Q3. What is current transformer?
Ans. 
A current transformer is a type of instrument transformer that is used to measure alternating current.
• Current transformers step down current to a safe level for measurement or protection purposes.

• They have a primary winding connected in series with the circuit carrying the current to be measured.

• The secondary winding is connected to measuring or protective devices.

• Current transformers are commonly used in power systems...read more
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Q4. What is difference between current transformer and potential transformer?
Ans. 
Current transformer is used to measure current while potential transformer is used to measure voltage.
• Current transformer is connected in series with the circuit being measured, while potential transformer is connected in parallel.

• Current transformer steps down the current to a measurable level, while potential transformer steps down the voltage.

• Current transformer is used for protection and metering purposes, while po...read more
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Q5. What is current
Ans. 
Current is the flow of electric charge in a circuit.
• Current is measured in Amperes (A).

• It is the rate of flow of electric charge past a point in a circuit.

• Current can be either direct current (DC) or alternating current (AC).

• In a series circuit, the current is the same at all points.

• In a parallel circuit, the total current is divided among the branches.

• Ohm's Law relates current, voltage, and resistance: I = V/R.
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Q6. What is voltage
Ans. 
Voltage is the difference in electric potential between two points in a circuit, measured in volts.
• Voltage is the driving force that pushes electric current through a circuit

• It is measured in volts (V)

• Higher voltage means more potential energy available to move electrons

• Voltage can be DC (direct current) or AC (alternating current)

• Example: A battery provides a voltage of 1.5V to power a flashlight
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Consists of questions related to Aptitude and Reasoning

The GD round consists of group discussion on the topics given by interviewer

Q1. 1.Question related to jumble words 2. Email writing
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Q1. 1.What is cloud Computing? 2. Explain Data Layers ? 3. What is Virtualization? 4. Explain about your final year project 5. Sql questions on Joins , Normalisation
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Q1. 1. What is your weakness ? 2 . What are you hobbies ? 3 .Why Mindtree ? 4. Situation Based questions
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Q1. What is synchronous and histerisis motor
Ans. 
Synchronous motor runs at a constant speed while hysteresis motor has a rotor that follows the rotating magnetic field.
• Synchronous motor is used in applications where constant speed is required, such as in clocks and timers.

• Hysteresis motor is used in applications where precise control of speed is required, such as in record players and tape recorders.

• Synchronous motor has a stator and rotor that rotate at the same spe...read more
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Q2. Different between plc and scada
Ans. 
PLC is a hardware device that controls industrial processes, while SCADA is a software system that monitors and controls those processes.
• PLC is a programmable logic controller that controls the input/output of industrial processes.

• SCADA is a supervisory control and data acquisition system that collects and analyzes data from the industrial processes.

• PLC is a hardware device, while SCADA is a software system.

• PLC is used...read more
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Q3. Different between relay and contactor
Ans. 
Relays are used for low power applications while contactors are used for high power applications.
• Relays are typically used in control circuits to switch low power loads such as lights and fans.

• Contactors are used to switch high power loads such as motors and compressors.

• Relays have a lower current rating than contactors.

• Contactors have larger contacts and can handle higher currents than relays.

• Relays are typically smal...read more
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Q4. Different between switch and relay
Ans. 
Switches are used to control the flow of current in a circuit, while relays are used to switch a circuit on or off.
• Switches are manually operated, while relays are electrically operated.

• Switches are used in low voltage applications, while relays are used in high voltage applications.

• Switches are simple in construction, while relays are more complex.

• Examples of switches include light switches and toggle switches, while ...read more
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Q1. Different between switch and timer
Ans. 
Switch is an electronic component used to connect or disconnect a circuit while a timer is a device used to measure time intervals.
• Switch is used to turn on/off a device while timer is used to control the duration of a device's operation.

• Switch is a binary device with two states (on/off) while timer can be analog or digital and can measure time in seconds, minutes, or hours.

• Examples of switches include light switches, ...read more
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Q1. Technically about company like safety..
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Q2. What is 5s and devine
Ans. 
5S is a methodology used to organize and maintain a clean and efficient workplace.
• 5S stands for Sort, Set in Order, Shine, Standardize, and Sustain.

• It involves organizing and labeling tools and materials, cleaning and maintaining equipment, and creating a culture of continuous improvement.

• Example: A factory implementing 5S might label all tools and materials, create a designated storage area for each item, and regularl...read more
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