Vedanta Resources Mining Engineer Interview Questions and Answers

First round as conducted by based on aptitude and subject test

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Q1. Difference between space and burden of blasting
Ans. 
Space is the distance between blastholes, while burden is the distance from the blasthole to the free face of the rock.
• Space is the distance between blastholes in a blast pattern.

• Burden is the distance from the blasthole to the free face of the rock.

• Space affects the fragmentation and distribution of the blasted material.

• Burden influences the amount of energy transferred to the rock mass.

• Optimal space and burden ratios
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Q2. Types of coal grade
Ans. 
Coal grades are categorized based on their carbon content and energy value.
• Coal grades include lignite, sub-bituminous, bituminous, and anthracite

• Higher carbon content coal grades have higher energy value

• Anthracite is the highest grade coal with the highest carbon content and energy value
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Q1. Open cast questions
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Q2. Drilling and blasting
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Q1. What are the options available for addressing labor unrest occurring at a project site?
Ans. 
Options for addressing labor unrest at a project site include negotiation, mediation, implementing fair labor practices, and seeking legal recourse.
• Negotiate with labor unions or representatives to address grievances and reach a resolution

• Utilize mediation services to facilitate communication and find common ground between parties

• Implement fair labor practices and policies to address underlying issues and improve worki...read more
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Q2. What are the costs associated with operations, and what methods can be employed to reduce these costs?
Ans. 
Costs associated with operations in mining and methods to reduce them
• Costs include equipment maintenance, labor, energy consumption, and waste disposal

• To reduce costs, implement efficient mining techniques, optimize equipment usage, and streamline processes

• Utilize automation and technology to improve productivity and reduce labor costs

• Implement proper planning and scheduling to minimize downtime and maximize production

• ...read more
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Q3. Have you worked in a MDO set up?
Ans. 
Yes, I have worked in a MDO (Mine Development Operator) set up.
• I have experience working in a Mine Development Operator (MDO) set up where I was responsible for overseeing the development of mining projects.

• I have worked closely with geologists, surveyors, and other engineers to ensure the successful execution of mining plans.

• I have experience in coordinating with equipment operators and maintenance teams to ensure smo
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Questions were basic and should have very clear and precise knowledge about the topics.

Q1. What is inrush Current?
Ans. 
Inrush current is the high current drawn by an electrical device when it is first turned on.
• Inrush current occurs when the impedance of the device is low at startup, causing a surge in current flow.

• It can cause voltage drops, tripping of circuit breakers, and damage to components.

• Common examples include when a motor starts up or when a power supply is turned on.
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Q2. What is symmetrical and Unsymmetrical Faults?
Ans. 
Symmetrical faults have balanced currents and voltages, while unsymmetrical faults have unbalanced currents and voltages.
• Symmetrical faults have equal currents and voltages on all phases, such as three-phase short circuit faults.

• Unsymmetrical faults have different currents and voltages on different phases, such as single-phase faults or line-to-ground faults.

• Symmetrical faults are easier to analyze and protect against ...read more
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