Sadhu Forging Interview Questions and Answers

Q1. Grading system of steel
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Steel grading system categorizes steel based on its chemical composition, physical properties, and intended use.
• Steel grades are typically classified by a numbering system such as AISI, ASTM, or SAE.

• Grades indicate the carbon content, strength, and other alloying elements present in the steel.

• Examples include AISI 304 stainless steel, ASTM A36 structural steel, and SAE 4140 alloy steel.
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Q2. Heat treatment process
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Q3. Structure after forging
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The structure after forging is typically more refined and denser compared to the original material.
• Forging process rearranges the internal grain structure of the material

• Grain boundaries become more uniform and aligned

• Increases in strength and toughness can be observed

• Reduction in porosity and defects

• Examples: Steel forged into a crankshaft, aluminum forged into aircraft components
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Q4. Induction hardening process
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Q5. 9 point sample location in carburizing furnace
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Sample locations in a carburizing furnace are crucial for accurate analysis of the process.
• Sample locations should be evenly distributed throughout the furnace to ensure representative results.

• Consider placing samples at different heights and distances from the heat source to account for temperature variations.

• Samples should be placed in areas where carburization is expected to be most effective, such as near the carbo...read more
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Q6. Effect of fine pearlite and getrite
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Fine pearlite and getrite have different effects on the properties of steel.
• Fine pearlite increases strength and hardness of steel due to its fine structure.

• Getrite improves toughness and ductility of steel by reducing the amount of pearlite present.

• Fine pearlite is formed by rapid cooling, while getrite is formed by slow cooling.

• The combination of fine pearlite and getrite can result in a balanced mix of strength, tou...read more
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Q1. How to control lead variation in Gear
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Lead variation in gears can be controlled by ensuring proper manufacturing processes and quality control measures.
• Use high precision machining techniques to ensure accurate dimensions of gears

• Implement strict quality control measures during production to detect and correct any variations

• Regularly calibrate and maintain production equipment to ensure consistency in gear manufacturing

• Utilize advanced technology such as C...read more
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Q1. Can you provide a self-introduction?
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Q2. What basic information can you provide about your previous company?
Ans. 
My previous company was a leading electrical engineering firm specializing in power distribution systems.
• Specialized in designing and implementing power distribution systems

• Worked on projects for commercial and industrial clients

• Collaborated with other engineering disciplines for integrated solutions
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Q1. Can you provide a self-introduction?
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Q2. What is the history of the machinery used in your previous company?
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The machinery used in my previous company ranged from traditional electrical equipment to advanced automation systems.
• The machinery included transformers, generators, motors, and control panels for power distribution.

• We also utilized PLCs, SCADA systems, and robotics for automation and control processes.

• Regular maintenance and upgrades were conducted to ensure optimal performance and efficiency.

• Collaboration with vendo...read more
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Q3. CNC machine alarm and SPM MC and PLC related alarm
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Q4. What are the common alarms associated with Variable Frequency Drives (VFD)?
Ans. 
Common alarms associated with Variable Frequency Drives (VFD) include overvoltage, undervoltage, overcurrent, overtemperature, and ground fault.
• Overvoltage alarm: occurs when the voltage supplied to the VFD exceeds the specified limit.

• Undervoltage alarm: triggered when the voltage supplied to the VFD falls below the specified limit.

• Overcurrent alarm: indicates that the current drawn by the VFD exceeds the rated value.

• O...read more
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Q5. What are the common alarms encountered with CNC machines?
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Common alarms encountered with CNC machines include overtravel alarms, spindle alarms, and tool change alarms.
• Overtravel alarms occur when the machine reaches its physical limits and tries to move further

• Spindle alarms can be triggered by issues such as overheating or excessive vibration

• Tool change alarms may indicate problems with the tool holder or tool changer mechanism
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Q6. What are the common alarms associated with a Vertical Machining Center (VMC)?
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Common alarms associated with a VMC include tool wear, tool breakage, spindle overload, and coolant level.
• Tool wear alarm indicates the need to replace the cutting tool due to wear and tear.

• Tool breakage alarm alerts when a cutting tool breaks during machining.

• Spindle overload alarm warns of excessive load on the spindle, which can lead to damage.

• Coolant level alarm signals when the coolant level in the machine is low,...read more
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Q7. What is the basic information regarding Diesel Generator (DG) sets?
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Diesel Generator (DG) sets are backup power sources commonly used in industries and commercial buildings.
• DG sets consist of a diesel engine and an electric generator to produce electricity.

• They are used as backup power sources in case of grid power failure.

• DG sets are commonly used in industries, hospitals, data centers, and commercial buildings.

• They require regular maintenance and fuel supply to ensure proper function...read more
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Q1. Last Working period
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Q2. Last Salary paid with past company
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