Hindustan Zinc Maintenance Electrician Interview Questions and Answers

Physics chemistry maths

Q1. What is ohm's law
Ans. 
Ohm's law states that the current flowing through a conductor is directly proportional to the voltage across it, and inversely proportional to the resistance of the conductor.
• Ohm's law is represented by the formula V = I * R, where V is voltage, I is current, and R is resistance.

• It helps in calculating the relationship between voltage, current, and resistance in an electrical circuit.

• For example, if a circuit has a vol...read more
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Q2. What is galvanometer
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A galvanometer is a device used to detect and measure small electric currents.
• Galvanometers typically consist of a coil of wire in a magnetic field, which deflects in response to the current flowing through it.

• They are often used as components in more complex instruments like ammeters and voltmeters.

• Galvanometers can be analog or digital, with analog versions displaying readings on a scale and digital versions showing ...read more
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Q3. What is power factor ?
Ans. 
Power factor is the ratio of real power to apparent power in an electrical system.
• Power factor is a measure of how effectively electrical power is being used in a system.

• It is calculated by dividing the real power (in watts) by the apparent power (in volt-amperes).

• A power factor of 1 indicates all the power is being used effectively, while a power factor less than 1 indicates inefficiency.

• Improving power factor can red...read more
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Q4. What is galvenisation?
Ans. 
Galvanization is the process of applying a protective zinc coating to steel or iron to prevent rusting.
• Galvanization involves immersing the metal in a bath of molten zinc or using an electroplating process.

• The zinc coating acts as a sacrificial anode, protecting the underlying metal from corrosion.

• Common examples of galvanized items include galvanized steel pipes, fences, and roofing materials.
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Q1. What is light. How to used
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Light is a form of electromagnetic radiation that is visible to the human eye. It is used for illumination, communication, and various other applications.
• Light is a type of electromagnetic radiation that is visible to the human eye.

• It can be produced naturally (sunlight) or artificially (light bulbs, LEDs).

• Light is used for illumination in homes, offices, streets, etc.

• It is also used for communication (fiber optics), p...read more
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Q2. What is transform
Ans. 
A transformer is a device that transfers electrical energy from one circuit to another through electromagnetic induction.
• Transformers consist of two coils of wire, known as the primary and secondary coils.

• The primary coil is connected to a power source, creating a magnetic field when current flows through it.

• This magnetic field induces a voltage in the secondary coil, allowing for the transfer of electrical energy.

• Tran...read more
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Q3. What is cooling tower
Ans. 
A cooling tower is a specialized heat exchanger in which air and water are brought into direct contact to reduce the water's temperature.
• Used in HVAC systems to remove heat from a building or industrial process

• Water is circulated through the tower and exposed to air, causing evaporation and cooling

• Commonly seen in power plants, refineries, and large buildings
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Q4. 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.

• There are two types of current - direct current (DC) and alternating current (AC).

• Current is calculated using Ohm's Law: I = V/R, where I is current, V is voltage, and R is resistance.
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Q1. What is breaker
Ans. 
A breaker is an electrical switch designed to protect an electrical circuit from damage caused by overload or short circuit.
• A breaker automatically interrupts the flow of electricity when it detects an overload or short circuit.

• Breakers come in different types such as circuit breakers, fuse boxes, and ground fault circuit interrupters (GFCIs).

• They are essential for preventing electrical fires and protecting electrical ...read more
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Q2. What is CRM. What used
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CRM stands for Customer Relationship Management. It is a strategy used by companies to manage interactions with customers and potential customers.
• CRM involves using technology to organize, automate, and synchronize sales, marketing, customer service, and technical support.

• It helps companies build and maintain relationships with customers, streamline processes, and improve profitability.

• Examples of CRM software include
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Q1. What is megger. What used
Ans. 
A megger is a portable instrument used to measure the insulation resistance of electrical equipment.
• Measures insulation resistance to detect any faults or breakdowns in electrical insulation

• Helps prevent electrical accidents and equipment failures

• Commonly used in maintenance and troubleshooting of electrical systems
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Q2. What is MW . How to explen
Ans. 
MW stands for megawatt, a unit of power equal to one million watts.
• MW is a unit of power used to measure the rate at which energy is generated or consumed.

• 1 MW is equal to 1 million watts or 1,000 kilowatts.

• It is commonly used in the context of electricity generation and consumption.

• For example, a large wind turbine may have a capacity of 2 MW, meaning it can generate 2 million watts of power.
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Q1. Wiring MCB bord switch
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Q2. Yes wiring board switchMCB
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Q1. Safety of transformer
Ans. 
The safety of a transformer is crucial to prevent electrical hazards and ensure proper functioning.
• Regular maintenance and inspections are essential to ensure the transformer is in good condition.

• Proper grounding and insulation are necessary to prevent electrical shocks and fires.

• Following safety protocols and guidelines while working with transformers is important to avoid accidents.

• Using appropriate personal protecti...read more
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Q2. Safety of dg set
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Ensuring the safety of a DG set involves regular maintenance, proper installation, and adherence to safety protocols.
• Regular maintenance of the DG set is essential to ensure safe operation.

• Proper installation of the DG set by qualified professionals is crucial for safety.

• Adherence to safety protocols such as proper grounding, ventilation, and fuel storage is necessary to prevent accidents.

• Regular testing and inspection...read more
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Q3. Safety of lt panel
Ans. 
Ensuring the safety of LT panels is crucial to prevent electrical hazards and ensure smooth operation of electrical systems.
• Regular inspection and maintenance of LT panels is essential to identify and address any potential issues.

• Proper labeling of circuits and components in LT panels can help in quick identification and troubleshooting.

• Implementing safety protocols and procedures for working on or near LT panels is im...read more
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Q1. Plc and scada analog Electronics
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Q2. Transmission and destitution
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Q3. Electrical machine
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Q4. Basic of Electrical engineering
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Q5. Digital electronics
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Q6. Electrical instrument and measurement
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Q1. Mobile Chaucer plant
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Q2. Ster-delt connection
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Q1. NO NC connection
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Q2. Wiring system all type
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Q3. Home wiring system
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Q1. What is your last job
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Q2. What is your previous company responsibility
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Q3. What about safety
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