Polybond India Maintenance Engineer Interview Questions and Answers

Q1. What is the plc
Ans. 
PLC stands for Programmable Logic Controller, a digital computer used for automation of electromechanical processes.
• PLC is used to control machinery in industries by programming sequences of operations.

• It is designed to withstand harsh industrial environments.

• PLCs can be programmed using ladder logic, function block diagrams, or structured text.

• They are commonly used in manufacturing, automotive, and food processing in...read more
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Q2. What is cnc machine
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A CNC machine is a computer-controlled machine tool used for cutting, shaping, and finishing metal, wood, or other materials.
• CNC stands for Computer Numerical Control

• CNC machines use coded instructions to control the movement of the cutting tool

• Common types of CNC machines include milling machines, lathes, and routers

• CNC machines are widely used in manufacturing industries for precision machining
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Q3. What is servo drive
Ans. 
A servo drive is an electronic amplifier used to power and control servo motors in automation systems.
• Converts low-power control signals into high-power signals to drive the servo motor

• Provides precise control over the speed, position, and torque of the motor

• Used in robotics, CNC machines, conveyor systems, etc.
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Q4. External encorder by pass parameter in cnc
Ans. 
External encoder bypass parameter in CNC allows the machine to ignore the feedback from the external encoder and use internal feedback instead.
• External encoder bypass parameter is used in CNC machines to switch between using external encoder feedback and internal feedback.

• This parameter is typically used when the external encoder is malfunctioning or needs to be bypassed for testing purposes.

• By setting the bypass param...read more
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Basic from our bachelor degree

Q1. Simple question about my self and some technical questions
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Q1. Basics core subject questions
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Q1. What is the reason behind temperature rise up of hydraulic oil in die casting machine
Ans. 
Temperature rise of hydraulic oil in die casting machine is caused by friction, overloading, inadequate cooling, or contaminated oil.
• Friction between moving parts can generate heat and increase oil temperature

• Overloading the machine can cause excessive heat generation

• Inadequate cooling system or malfunctioning cooling components can lead to temperature rise

• Contaminated oil with debris or moisture can reduce lubrication
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Q1. Regarding my notice period and past experience we mutually Decided my salary scale for offer letter
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Q1. Related to Plant Maintenance work
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Q2. Electrical And Mechanical
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