POSCO MAHARASHTRA STEEL Diploma Mechanical Engineer Interview Questions and Answers

Q1. Job related question??
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Q2. Jobe role in previous company??
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Q1. Product oriented process
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Q2. Machine name & capacity of current company
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The machine name at my current company is XYZ-2000 and it has a capacity of 500 units per hour.
• Machine name: XYZ-2000

• Capacity: 500 units per hour
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Q1. Basic questions like Current Salary Expected Salary, Why you want to leave.
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Q1. Basic Domain questions
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Q1. HOD's basic technical questions
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Q1. Salary Negotiation ,
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Q1. Different between Forgings and casting
Ans. 
Forging involves shaping metal through compression, while casting involves pouring molten metal into a mold.
• Forging involves shaping metal through compressive forces, while casting involves pouring molten metal into a mold to solidify.

• Forging typically results in stronger and more durable parts compared to casting.

• Forging is a more precise process that allows for tighter tolerances, while casting is more suitable for c...read more
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Q2. What is the forgings
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Forgings are metal components that are shaped by compressive forces, typically through hammering or pressing.
• Forgings are typically stronger and more reliable than castings or machined parts.

• Common forging processes include open-die forging, closed-die forging, and ring rolling.

• Examples of forged components include crankshafts, connecting rods, and gears.

• Forgings are often used in industries such as automotive, aerospa
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Q3. What is the casting
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Q4. Process in casting
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Process in casting involves pouring molten metal into a mold to create a desired shape.
• Mold preparation is crucial for successful casting

• Molten metal is poured into the mold cavity

• Cooling and solidification of the metal takes place inside the mold

• The casting is removed from the mold and finished as needed
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Q5. Process in forging
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Forging is a manufacturing process where metal is shaped by applying compressive forces using a hammer or press.
• Metal is heated to a high temperature to make it more malleable

• The metal is then placed on a die and struck with a hammer or pressed to shape it

• Forging can be done using different techniques like open-die forging, closed-die forging, and impression-die forging
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Q1. Genarator protection
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Q2. Transformer protection
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Q3. What is induction motor
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An induction motor is a type of AC motor where power is supplied to the rotor by electromagnetic induction.
• Induction motors are commonly used in various applications such as industrial machinery, pumps, fans, and compressors.

• They do not require brushes to transfer power to the rotor, making them more reliable and maintenance-free compared to brushed DC motors.

• The speed of an induction motor is determined by the frequen...read more
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Q4. Work principle transformer
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Q5. What is dc series motor
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A DC series motor is a type of DC motor where the field winding is connected in series with the armature winding.
• Field winding and armature winding are connected in series

• High starting torque but low speed

• Used in applications where high starting torque is required, such as in traction applications
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Q6. Grid to TG sync process
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Q1. Electrical department
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Q2. What is MCC PCC PANEL
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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. What is the purpose of the "STOP" button in a Siemens PLC? What is the purpose of Organization Blocks (OBs) in a Siemens PLC? What does "fail-safe mode" mean in the context of a Siemens PLC? What is the ro...read more
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The STOP button in a Siemens PLC is used to immediately halt the operation of the PLC.
• The STOP button is a safety feature that allows operators to quickly stop the PLC in case of emergencies or malfunctions.

• Pressing the STOP button will halt the execution of the program and prevent any further outputs from the PLC.

• The STOP button is typically connected to a dedicated input on the PLC to ensure immediate response.
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Q2. How is a transformer's rated capacity expressed, and what is the reason for this expression?
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Transformer's rated capacity is expressed in kVA and is based on the maximum amount of power it can handle.
• Transformer's rated capacity is expressed in kilovolt-amperes (kVA).

• The reason for expressing rated capacity in kVA is to account for both the voltage and current handling capabilities of the transformer.

• kVA takes into consideration the power factor of the load, ensuring that the transformer can handle the maximum...read more
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Q3. What are the types of PLC?
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Types of PLC include modular, compact, rack-mounted, and distributed control system.
• Modular PLC: Consists of separate modules for CPU, I/O, and communication.

• Compact PLC: All components are housed in a single unit, suitable for small-scale applications.

• Rack-mounted PLC: Components are mounted on a rack, allowing for easy expansion and customization.

• Distributed Control System (DCS): PLCs are spread out across a network,
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Q4. Do you know about redundancy in PLCs?
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Redundancy in PLCs refers to having backup components or systems in place to ensure continuous operation in case of failure.
• Redundancy in PLCs involves having duplicate components or systems that can take over in case of a failure in the primary system.

• Examples of redundancy in PLCs include having backup power supplies, redundant CPUs, and duplicate I/O modules.

• Redundancy can help prevent downtime and ensure continuous...read more
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Q5. How to maintain a safe loading dock
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Maintaining a safe loading dock involves regular inspections, proper training for employees, clear communication, and implementing safety protocols.
• Regularly inspect loading dock equipment for wear and tear

• Provide proper training for employees on safe loading and unloading procedures

• Ensure clear communication between truck drivers, warehouse staff, and management

• Implement safety protocols such as using wheel chocks, do
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