Power Mech Projects Electrical Engineer Interview Questions and Answers

Q1. What is full name of RPM.
Ans. 
RPM stands for Revolutions Per Minute.
• RPM stands for Revolutions Per Minute

• It is a unit of rotational speed

• Commonly used in the context of engines, motors, and other rotating machinery
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Q2. How many type of Motor.
Ans. 
There are various types of motors including DC motors, AC motors, stepper motors, and servo motors.
• DC motors: used in applications where speed control is important, such as in electric vehicles.

• AC motors: commonly used in household appliances and industrial machinery.

• Stepper motors: used in applications requiring precise position control, like 3D printers.

• Servo motors: used in robotics and automation for accurate contr
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Q1. What is Earthing.
Ans. 
Earthing is the process of connecting electrical systems to the ground to prevent electric shock and protect equipment.
• Earthing provides a path for fault currents to flow safely into the ground.

• It helps in stabilizing voltage levels and protecting against lightning strikes.

• Earthing is essential for safety in electrical systems to prevent electric shocks.

• Examples of earthing systems include grounding rods, grounding pla
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Q2. Type of Insulator
Ans. 
Insulators are materials that do not conduct electricity and are used to prevent the flow of current.
• Insulators are materials with high resistivity, such as rubber, glass, porcelain, and plastic.

• They are used to separate conductors in electrical systems to prevent short circuits.

• Insulators are crucial for safety in electrical installations to avoid electric shocks and fires.
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Q1. Self introduction
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Q2. Previous experience and languages
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Q1. What about synchronous motor principal
Ans. 
Synchronous motors operate at a constant speed determined by the frequency of the power source.
• Synchronous motors have a rotor that rotates at the same speed as the rotating magnetic field in the stator.

• They are used in applications where constant speed is required, such as in industrial processes or power generation.

• Synchronous motors are more efficient than induction motors at higher loads.

• They require a separate DC ...read more
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Q2. Difference between induction and synchronous motor
Ans. 
Induction motors rely on induction to produce torque, while synchronous motors require a magnetic field to rotate at a constant speed.
• Induction motors do not require any external connections to the rotor, while synchronous motors need a DC power source to create the magnetic field.

• Induction motors are self-starting, while synchronous motors require external means to start.

• Induction motors are more commonly used in indu...read more
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Normal introduction and interview

Q1. Type of electrical motor
Ans. 
There are various types of electrical motors including AC motors, DC motors, synchronous motors, and induction motors.
• AC motors: commonly used in household appliances and industrial applications

• DC motors: used in applications where speed control is important, such as in electric vehicles

• Synchronous motors: used in applications where precise speed control is required, such as in clocks and timers

• Induction motors: widely...read more
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Q2. 3 phase induction motor starter
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Q3. Protection of transformer
Ans. 
Protection of transformer involves measures to prevent damage from overcurrent, overvoltage, and overheating.
• Use overcurrent protection devices such as fuses and circuit breakers to prevent damage from excessive current flow.

• Install overvoltage protection devices like surge arresters to safeguard against voltage spikes.

• Implement temperature monitoring systems to prevent overheating, such as thermal sensors and cooling ...read more
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Q4. ACB VCB maintenance
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Q5. Star delta connection
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Q1. What is Full form DOL starter
Ans. 
DOL starter stands for Direct-On-Line starter, used to start motors by directly connecting them to the power supply.
• DOL starter is the simplest and most common type of motor starter.

• It directly connects the motor to the power supply without any intermediate starting method.

• It provides full voltage to the motor during starting, which can cause high inrush current.

• DOL starters are suitable for small to medium-sized motor...read more
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Q2. What is APFC PANEL
Ans. 
APFC PANEL stands for Automatic Power Factor Correction Panel, used to maintain power factor in electrical systems.
• APFC PANEL automatically monitors and corrects the power factor of electrical systems.

• It helps in reducing electricity bills by maintaining a high power factor.

• APFC PANELs are commonly used in industries and commercial buildings.

• They consist of capacitors that are switched on and off based on the load requ...read more
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Q3. Star dalta conection
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Q1. As per company policy requirement condition
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Q1. As per company policy requirement
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