Sigma Minerals HR Manager Interview Questions and Answers

Aptitude test was moderate ,

Group discussion happened online topic was ban on chinese apps

Q1. Whats the use of nonel , why it is use ?
Ans. 
Nonel is a type of non-electric initiation system used in blasting operations to detonate explosives.
• Nonel is used in mining, construction, and demolition industries.

• It is a safe and reliable method of initiating explosives without the need for electricity.

• Nonel consists of a shock tube filled with a small amount of explosive material that is initiated by a blasting cap.

• It allows for precise timing and sequencing of bl...read more
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Q2. What does safety means to you ?
Ans. 
Safety means ensuring the well-being and protection of individuals from harm or danger.
• Safety involves implementing measures to prevent accidents and injuries.

• It includes following protocols and guidelines to minimize risks.

• Safety also encompasses creating a culture of awareness and accountability.

• Examples: wearing personal protective equipment, conducting regular safety inspections, providing proper training.
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Q3. Why you opted mining engineering?
Ans. 
Passion for solving complex problems and interest in natural resources led me to choose mining engineering.
• Fascination with geology and earth sciences

• Desire to work in a challenging and dynamic industry

• Opportunity to contribute to sustainable resource extraction

• Interest in utilizing advanced technology in mining operations
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Very basic aptitude test, if you know basics about your field you'll pass through this round.

A moderate level GD, most of the elimination happen in this round, you only need to get one chance and tell your points

Q1. Tell me something about yourself
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Q2. Basic technical questions related to your field.
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Q1. Share details of your previous job.
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Q2. What are your strengths and weaknesses?
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Q3. Tell me about yourself.
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Q1. What about power system
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Q2. What is protection system
Ans. 
A protection system is a set of devices and measures designed to prevent damage or harm to equipment, personnel, or the environment in case of a fault or abnormal condition.
• Protection systems can include circuit breakers, fuses, relays, and alarms.

• They are commonly used in electrical systems to prevent overloads, short circuits, and ground faults.

• Protection systems are essential for ensuring the safety and reliability ...read more
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Q1. Explain about your current roles
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Q2. Detailed technical explanation of the Projects that I have worked with
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Q1. Pipe Sizing Calculation?
Ans. 
Pipe sizing calculation involves determining the appropriate diameter of a pipe based on flow rate, pressure drop, and material properties.
• Calculate the required flow rate for the system

• Determine the pressure drop allowed in the system

• Consider the material properties of the pipe such as friction factor and roughness

• Use pipe sizing charts or formulas to find the appropriate diameter

• Ensure the selected pipe size meets th
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Q2. Corrosion allowance & some questions in ASME B31.3
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Q3. Reason for Job Change
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Basic aptitude question of gate and in technical go through gate 1 mark question

Q1. Reynold no. Details
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Q2. Shell and tube heat exchanger design
Ans. 
Shell and tube heat exchanger design involves selecting appropriate materials, determining tube layout, and calculating heat transfer coefficients.
• Select appropriate materials based on fluid properties and operating conditions

• Determine tube layout to optimize heat transfer efficiency

• Calculate heat transfer coefficients to ensure proper heat exchange

• Consider factors like fouling, pressure drop, and thermal expansion in ...read more
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