Bmm Ispat Diploma Electrical Engineer Interview Questions and Answers

Q1. Electrical engineer...
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Q2. Plc... Electrical machine
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Q3. Plc electrical works
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Q1. Electrical works....plc
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Q1. What is turbine
Ans. 
A turbine is a machine that converts the energy from a fluid flow into mechanical energy.
• Turbines are commonly used in power plants to generate electricity from steam or water flow.

• There are different types of turbines such as steam turbines, gas turbines, and water turbines.

• Turbines have blades that are rotated by the fluid flow, causing a shaft to spin and generate power.

• The mechanical energy produced by turbines can
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Q2. What is blast furnace
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A blast furnace is a type of metallurgical furnace used for smelting to produce industrial metals, generally iron.
• Used for smelting iron ores to produce iron

• Consists of a furnace chamber with a stack and tuyeres

• Operates at high temperatures using coke as fuel

• Produces molten iron and slag as byproducts
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Q3. 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 is connected to a power source, while secondary coil is connected to the load

• Works on the principle of electromagnetic induction to change voltage levels

• Used to step up or step down voltage levels in electrical systems

• Ex...read more
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Q4. Types of transformer
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Types of transformers include step-up, step-down, isolation, autotransformer, and distribution transformers.
• Step-up transformer increases voltage levels

• Step-down transformer decreases voltage levels

• Isolation transformer provides electrical isolation between primary and secondary windings

• Autotransformer has a single winding with multiple taps for different voltage levels

• Distribution transformer is used to supply power t
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Q5. Working principle of Transformers
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Transformers work on the principle of electromagnetic induction to transfer electrical energy between two or more circuits.
• Transformers have two coils of wire, known as primary and secondary coils, which are wound around a core made of ferromagnetic material.

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

• This changing magnetic field induces a voltage in ...read more
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Q6. What is resistance
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Resistance is the opposition to the flow of electric current in a material.
• Resistance is measured in ohms (Ω).

• It is caused by collisions between electrons and atoms in a material.

• Materials with high resistance are insulators, while materials with low resistance are conductors.

• Resistance can be calculated using Ohm's Law: R = V/I, where R is resistance, V is voltage, and I is current.
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Q7. What is diode types of diode
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Diodes are electronic components that allow current to flow in one direction only. Common types include PN junction diodes, Zener diodes, Schottky diodes, and light-emitting diodes (LEDs).
• PN junction diodes: Basic diodes that allow current to flow in one direction only.

• Zener diodes: Diodes that operate in the reverse breakdown region and are used for voltage regulation.

• Schottky diodes: Diodes with a lower forward volta...read more
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Q8. What is power factor
Ans. 
Power factor is a measure of how effectively electrical power is being used in a circuit.
• Power factor is the ratio of real power (kW) to apparent power (kVA) in an electrical circuit.

• It indicates how efficiently power is being converted into useful work.

• A power factor of 1 (or 100%) means all the power is being used effectively, while a power factor of 0 means none of the power is being used efficiently.

• Power factor ca...read more
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Q9. What is DC motor
Ans. 
A DC motor is a type of electric motor that runs on direct current electricity, converting electrical energy into mechanical energy.
• DC motors have a rotating armature and a stationary field magnet

• They operate based on the principle of Lorentz force

• Common types include brushed and brushless DC motors

• DC motors are widely used in various applications such as robotics, electric vehicles, and industrial machinery
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Q10. Difference between AC and DC motor
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AC motors use alternating current and are more commonly used for industrial applications, while DC motors use direct current and are often used in household appliances.
• AC motors use alternating current, while DC motors use direct current

• AC motors are more commonly used in industrial applications, while DC motors are often used in household appliances

• AC motors are generally more efficient and require less maintenance co...read more
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Q11. What is electromagnetic field
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An electromagnetic field is a physical field produced by electrically charged objects. It affects the behavior of charged objects in the vicinity of the field.
• Consists of electric and magnetic components

• Generated by electric charges and currents

• Can be static or dynamic

• Used in various applications such as wireless communication and MRI machines
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Q12. Types of motor and working principles
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Types of motors include DC motors, AC motors, synchronous motors, and induction motors. Each type operates based on different principles.
• DC motors operate using direct current and have a commutator to switch the current direction, examples include brushed and brushless DC motors.

• AC motors operate using alternating current and include types like synchronous motors and induction motors.

• Synchronous motors rotate at a cons...read more
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Q13. What is V F D
Ans. 
VFD stands for Variable Frequency Drive, a type of motor controller that drives an electric motor by varying the frequency and voltage supplied to the motor.
• VFDs are used to control the speed and torque of AC motors in various applications.

• They are commonly used in HVAC systems, industrial pumps, fans, and conveyor systems.

• VFDs can improve energy efficiency by matching the motor speed to the actual load requirements.

• Th...read more
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Q14. What is earthing
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Earthing is the process of connecting electrical equipment to the earth to prevent electric shocks and ensure safety.
• Earthing provides a path for fault currents to flow safely into the ground.

• It helps in protecting equipment and individuals from electrical faults.

• Earthing reduces the risk of fire hazards in electrical systems.

• Types of earthing include plate earthing, pipe earthing, and rod earthing.

• Proper earthing is e...read more
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Q15. Types of motor and working principle
Ans. 
Types of motors include DC motors, AC motors (induction, synchronous), stepper motors, and servo motors. Each type operates based on different principles.
• DC motors operate on the principle of Lorentz force, where a current-carrying conductor experiences a force in a magnetic field.

• AC induction motors work on the principle of electromagnetic induction, where a rotating magnetic field induces current in the rotor.

• AC sync...read more
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Q16. What is contactor
Ans. 
A contactor is an electrical device used to switch an electrical circuit on or off.
• Contactor is typically used in applications where high current needs to be controlled, such as in industrial machinery.

• It consists of a coil which when energized creates a magnetic field that pulls in a set of contacts to make or break the circuit.

• Contactor can be controlled manually or automatically through a control system.

• Common examp...read more
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Q17. What is cooking and crawling
Ans. 
Cooking and crawling are terms used in electrical engineering to describe the movement of a circuit breaker's contacts.
• Cooking refers to the slow separation of the contacts when the circuit breaker is opened under load.

• Crawling refers to the movement of the contacts due to the presence of small currents even when the circuit breaker is in the closed position.
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Q1. Moter start and transformer
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Q2. Roter ejecter began galindar
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Q3. Belding machines trolley
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Q4. Dsl power, eot Caren
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Q1. Why job requirement
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Q2. Electrical engineering department
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Q1. Electrical engineering question
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Interest in electrical equipment skill skill development engineer
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Q1. Electrical machine
Ans. Type of motor . working principle
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Diploma in electrical engineering in Gumla polytechnic Gumla Jharkhand

Q1. Electrical machine and power system
Ans. 
Mechanical energy to electrical energy convert in electrical machine and power system is a generation transmission and distribution of electrical energy
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Q2. Transformers working principle
Ans. 
Transformers work on the principle of electromagnetic induction to transfer electrical energy between two or more circuits.
• Transformers consist of two or more coils of wire called windings.

• The primary winding is connected to the input voltage source, while the secondary winding is connected to the load.

• When an alternating current (AC) flows through the primary winding, it creates a changing magnetic field.

• This changing...read more
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Q3. Motor working principle
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Motor working principle
• A motor converts electrical energy into mechanical energy

• It operates on the principle of electromagnetic induction

• When current flows through a coil in a magnetic field, a force is generated, causing the coil to rotate

• This rotation is transferred to the motor shaft, resulting in mechanical motion

• Different types of motors include DC motors, AC motors, and stepper motors
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Q4. Type of motor and type of transformer
Ans. 
The type of motor can be AC or DC, while the type of transformer can be step-up or step-down.
• AC motors are commonly used in household appliances and industrial machinery.

• DC motors are often used in electric vehicles and robotics.

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

• Transformers are used in power distribution systems to transfer electrical energy between different voltage l
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Q5. What is circuit breaker
Ans. 
A circuit breaker is an electrical switch designed to protect an electrical circuit from damage caused by excess current.
• It automatically interrupts the flow of electricity when a fault is detected.

• It prevents damage to electrical equipment and reduces the risk of fire.

• Circuit breakers can be reset after tripping, unlike fuses which need to be replaced.

• They are commonly used in residential, commercial, and industrial a...read more
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Q6. Types of circuit
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There are three types of circuits: series, parallel, and combination.
• Series circuit: components are connected in a single path, current is the same throughout, voltage divides across components.

• Parallel circuit: components are connected in multiple paths, voltage is the same across components, current divides across paths.

• Combination circuit: a mix of series and parallel circuits, components are connected in both serie
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Q7. Dol starter power wiring and control
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Q8. What is CT and PT
Ans. 
CT stands for Current Transformer and PT stands for Potential Transformer.
• CT is used to measure high currents by stepping down the current to a manageable level.

• PT is used to measure high voltages by stepping down the voltage to a safe level.

• CT and PT are commonly used in power systems for protection, metering, and control purposes.

• CTs and PTs are typically connected to instruments, relays, or meters to provide accurat...read more
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Q9. What is register
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A register is a small amount of fast memory located within a computer's CPU.
• Registers store data that the CPU needs to access quickly.

• They are used to hold instructions, data, and addresses during the execution of a program.

• Registers are faster to access than main memory, allowing for faster processing.

• Examples of registers include the program counter, instruction register, and general-purpose registers.
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Q10. What is turbine
Ans. 
A turbine is a device that converts the energy from a fluid flow into useful work.
• Turbines are commonly used in power generation to convert the energy of steam, water, or gas into mechanical energy.

• They consist of a rotor with blades that are driven by the fluid flow, causing the rotor to rotate.

• The rotation of the rotor can be used to generate electricity or perform other types of work.

• Different types of turbines incl...read more
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Q1. What is Cooling Tower .?
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A cooling tower is a specialized heat exchanger in which air and water are brought into direct contact to reduce the water's temperature.
• Cooling towers are commonly used in industrial and HVAC systems to remove heat from a process or building.

• They work by evaporating a small portion of the water to remove heat from the remaining water stream.

• The cooled water is then circulated back into the system to absorb more heat.

• C...read more
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Q2. How many Types of power Plant .?
Ans. 
There are several types of power plants including thermal, hydroelectric, nuclear, solar, wind, and geothermal.
• Thermal power plants use fossil fuels like coal, oil, or natural gas to generate electricity.

• Hydroelectric power plants harness the energy of flowing water to generate electricity.

• Nuclear power plants use nuclear reactions to produce electricity.

• Solar power plants convert sunlight into electricity using photov...read more
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Q3. 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 coils of wire (primary and secondary) wound around a core

• 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

• ...read more
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Q4. What is Resistance.?
Ans. 
Resistance is the opposition to the flow of electric current in a circuit.
• Resistance is measured in ohms (Ω).

• It is caused by the collisions of electrons with atoms in a conductor.

• Higher resistance leads to lower current flow in a circuit.

• Resistance can be affected by factors like material, length, and temperature.

• Examples of high resistance materials include rubber and glass.

• Examples of low resistance materials include
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Q1. Motor Starter panel EPMCC PMCC MCC ALL ELECTRICAL MAINTENANCE
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Q2. Motor Starter with contactor really protection
Ans. 
Motor starters with contactors provide protection by controlling the electrical supply to the motor.
• Motor starters with contactors prevent overload by disconnecting the motor from the power supply when excessive current is detected.

• They also protect against short circuits by quickly interrupting the circuit in case of a fault.

• Thermal overload relays can be used in conjunction with contactors to provide additional prote...read more
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