Jindal Steel and Power Mining Engineer Interview Questions and Answers

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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. What is thermocouple
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Q2. What is rtd
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Q1. Machine transmission distribution
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Q2. Electric generation
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Q3. Electric measurement
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Q1. Electrical department
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Q2. What is MCC PCC PANEL
Ans. 
MCC stands for Motor Control Center and PCC stands for Power Control Center. They are electrical panels used to control and distribute power to motors and other electrical equipment.
• MCC panels are used to control and distribute power to motors in industrial settings.

• PCC panels are used to control and distribute power to various electrical equipment.

• Both panels play a crucial role in ensuring efficient and safe operatio...read more
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Q1. Why do we improve power factor.
Ans. 
Improving power factor helps in reducing energy losses, increasing system efficiency, and reducing electricity costs.
• Improving power factor reduces the amount of reactive power flowing in the system, which in turn reduces energy losses.

• Higher power factor means more efficient use of electricity and less strain on the electrical system.

• Improving power factor can lead to reduced electricity costs for consumers and utilit...read more
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Q2. What is buccholz relay, how does it work?
Ans. 
Buccholz relay is a protective device used in oil-filled transformers to detect faults such as internal arcing or overheating.
• Buccholz relay is installed in the oil pipe connecting the transformer tank and conservator tank.

• It works based on the principle that gas is generated when a fault occurs in the transformer, causing oil level to drop and gas to accumulate in the relay.

• The relay consists of two float switches - o...read more
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Q3. What is DP in siemens communication?
Ans. 
DP in Siemens communication stands for Distributed Peripherals.
• DP is a communication protocol used by Siemens for connecting distributed peripherals to a central control system.

• It allows for real-time data exchange between the peripherals and the control system.

• DP is commonly used in industrial automation applications.

• Examples of DP communication modules include DP/DP couplers and DP slaves.
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Q4. How do we communicate s7 PLC and abb drive using profibus.
Ans. 
To communicate S7 PLC and ABB drive using Profibus, you need to configure the Profibus network, set up the communication parameters, and establish the communication link.
• Configure the Profibus network by setting the correct baud rate, address, and other network parameters.

• Set up the communication parameters on both the S7 PLC and ABB drive to ensure they are compatible with each other.

• Establish the communication link b...read more
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Q1. Electrical materials
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Q2. Power system protection
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Q3. Electrical energy system
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Q4. High voltage direct current
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Q5. Electrical control system
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Q1. Electrical management
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Q1. Transformer me dub-11 ka matalab kya hota hai
Ans. Maine btaya “d” ka matalab Maine btaya transformer ka primary winding delta connect and “y” ka matalab Maine btaya transformer ka secondary winding star me connect hoti hai and “11” ka matalab hota hai transformer ka phase angle
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Q2. What is thyrestor
Ans. 
A thyristor is a semiconductor device that acts as a switch and can handle high voltages and currents.
• It has three terminals: anode, cathode, and gate

• It can be turned on by applying a small current to the gate terminal

• It can handle high power and is commonly used in power control applications

• Examples include AC motor speed control, lighting dimming, and power supplies
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Q1. What is thermocouple?
Ans. 
A thermocouple is a device that measures temperature by detecting the voltage difference between two different metals.
• Consists of two different metal wires joined at one end

• Produces a voltage that varies with temperature

• Used in temperature measurement and control systems

• Commonly used in industrial applications such as furnaces and boilers
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Q2. What is ohomic value of PT-100?
Ans. 
The ohmic value of PT-100 is 100 ohms at 0°C.
• PT-100 is a type of platinum resistance thermometer.

• It has a resistance of 100 ohms at 0°C.

• The resistance increases with temperature at a rate of 0.385 ohms/°C.

• PT-100 is commonly used in industrial temperature measurement applications.
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Q3. What is calibration 3.0 and 5.0?
Ans. 
Calibration 3.0 and 5.0 refer to the accuracy level of a measuring instrument.
• Calibration 3.0 means the instrument has an accuracy level of 0.3% of the full scale reading.

• Calibration 5.0 means the instrument has an accuracy level of 0.5% of the full scale reading.

• The higher the calibration number, the more accurate the instrument is.

• Calibration is the process of adjusting an instrument to ensure its accuracy.

• Calibratio...read more
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