NMDC Limited Personnel Executive Interview Questions and Answers for Experienced

Q1. About yourself and work profile
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Q1. About Invoice processing, SAP Tcodes, About GST TDS knowledge , General Account,
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Q1. About Blast Furnace and Operation details
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Q2. Question about my previous experience and what kind of problem I faced there
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Q1. Why SF6 gas use in GIS not other gas?
Ans. 
SF6 gas is used in GIS due to its excellent insulating properties and high dielectric strength.
• SF6 gas has high dielectric strength, making it an excellent insulator for high voltage equipment like GIS

• SF6 gas is non-toxic, non-flammable, and chemically stable, making it a safe choice for GIS

• SF6 gas has a high global warming potential, but its use in GIS is tightly regulated to minimize emissions

• Other gases like nitroge...read more
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Q2. Which type of conductor use in Transmission line?
Ans. 
Various types of conductors are used in transmission lines depending on the application.
• Aluminum conductors are commonly used due to their lightweight and low cost.

• Copper conductors are used in high voltage and high current applications.

• ACSR (Aluminum Conductor Steel Reinforced) conductors are used for long distance transmission lines.

• High-temperature conductors like AAAC (All Aluminum Alloy Conductors) are used in are...read more
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Q1. Asking about integrated Steel plant.
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Q2. Asking specific past experience of your jobs profile.
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Physics,chem,math,quantitative apti.. etc

Q1. Can you work with team
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Q2. What is elctrolysis,what do you know how we can prepare aluminium
Ans. 
Electrolysis is a process of breaking down a compound using electricity. Aluminium can be prepared by electrolysis of alumina.
• Electrolysis involves passing an electric current through a compound to break it down into its constituent elements.

• Aluminium is prepared by electrolysis of alumina (Al2O3) dissolved in molten cryolite (Na3AlF6).

• The process involves the use of carbon electrodes, which react with the oxygen relea...read more
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Q3. Can you work at a temp 50 degree
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Q1. Document verification
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Q1. IP configuration and Network security ,EPABX, IPABX
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Direct through campus placement and group discussion.

Q1. All the studies related concepts were aksed
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Q2. About COST ACCOUNTING STANDARDS
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Q1. General discussion on cement grinding unit
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Q2. Discussion on grinding efficiency and factors effecting performance of grinding
Ans. 
Grinding efficiency is influenced by factors like feed rate, material properties, grinding wheel speed, and coolant usage.
• Feed rate: Higher feed rates can improve efficiency but may lead to increased wear on the grinding wheel.

• Material properties: Harder materials require slower grinding speeds to achieve optimal efficiency.

• Grinding wheel speed: Higher speeds can increase efficiency but may also generate more heat, aff...read more
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Q3. The effect of grinding media on ball mill performance
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Grinding media can significantly impact ball mill performance by affecting grinding efficiency and wear rate.
• The type of grinding media used can affect the grinding efficiency of the ball mill.

• Different materials of grinding media have varying wear rates, impacting maintenance costs.

• The size and shape of the grinding media can also influence the grinding process.

• For example, using ceramic balls instead of steel balls c...read more
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Q1. On slag reactivity and it's effect on cement performance
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Slag reactivity can impact cement performance by influencing hydration reactions and strength development.
• Slag reactivity refers to the ability of slag to react with water and form cementitious compounds.

• Higher slag reactivity can lead to faster hydration reactions and improved early strength development.

• However, excessive slag reactivity can also result in rapid setting and reduced workability of the concrete.

• Proper s...read more
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Q2. How the ground slag enhance concrete performance was discussed. The effects of ground slag in concrete especially durability of concrete was discussed
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