Shaily Engineering Plastics Ltd Maintenance Engineer Interview Questions and Answers for Freshers

Q1. What is VFD what is the basic control for operate a vfd
Ans. 
VFD stands for Variable Frequency Drive, it is used to control the speed of an electric motor.
• VFD is used to vary the speed of an electric motor by adjusting the frequency of the electrical supply to the motor.

• Basic control for operating a VFD includes setting the desired speed or frequency, start/stop commands, and monitoring parameters like current and voltage.

• Examples of basic controls for operating a VFD include ke...read more
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Q2. How to check a motor ,how to identified if motor is ok or not ,
Ans. 
To check a motor, perform visual inspection, check for unusual noises or vibrations, test electrical connections, measure voltage and current, and perform insulation resistance test.
• Perform visual inspection for any signs of damage or wear

• Check for unusual noises or vibrations during operation

• Test electrical connections for tightness and proper wiring

• Measure voltage and current to ensure they are within specifications

• P...read more
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Q3. What is the monthly electricity bill
Ans. 
The monthly electricity bill varies depending on usage and location.
• The monthly electricity bill can be influenced by factors such as the size of the property, number of occupants, energy efficiency of appliances, and local electricity rates.

• Usage of high-energy consuming appliances like air conditioners, heaters, and refrigerators can significantly impact the electricity bill.

• Location plays a role as electricity rates...read more
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Q4. What is the plant load
Ans. 
Plant load refers to the amount of power being consumed by a plant or facility at a given time.
• Plant load is measured in kilowatts (kW) or megawatts (MW).

• It represents the total electrical demand of the plant's equipment and machinery.

• Plant load can fluctuate throughout the day based on production needs and equipment usage.

• Monitoring plant load is important for ensuring efficient operation and preventing overload.

• Examp...read more
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Q5. What is the power factor and why it need to maintain ,on which power quantity or quality it impact and how this impact actually can be seen
Ans. 
Power factor is the ratio of real power to apparent power in an electrical system. It needs to be maintained for efficient power transfer and to avoid penalties from utility companies.
• Power factor impacts the efficiency of power transfer in electrical systems

• Low power factor can result in higher energy costs and penalties from utility companies

• It affects the quality of power supply and can lead to voltage drops and equ...read more
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Q6. Proximity sensor and realy uses
Ans. 
Proximity sensors detect the presence of an object without physical contact, while relays are used to control electrical circuits.
• Proximity sensors use electromagnetic fields, light, or sound to detect objects nearby.

• Relays are switches that open or close circuits based on an electrical signal.

• Proximity sensors can be used in automated doors, smartphones, and industrial machinery.

• Relays are used in control panels, HVAC
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Q7. Daily job profile ,
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Q8. Daily reports ,reporting to
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Q9. Preventive maintenance schedule
Ans. 
Preventive maintenance schedule involves regular inspections and maintenance tasks to prevent equipment breakdowns.
• Create a detailed list of all equipment that needs maintenance

• Establish a regular schedule for inspections and maintenance tasks

• Document all maintenance activities and keep records for future reference

• Prioritize maintenance tasks based on criticality and impact on operations

• Train maintenance staff on prope
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Q10. Compressor a b check
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Q11. Dg a b check
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Q1. Maintenance phylosophy
Ans. Depends on equipment running hour, criticality, availability and standby.
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Q1. Which are the equipment used in steam turbine? And their principal and working and troubleshooting?
Ans. 
Equipment used in steam turbine include turbine blades, nozzles, casing, rotor, bearings, and governor.
• Turbine blades: convert steam energy into mechanical energy

• Nozzles: control the flow of steam into the turbine

• Casing: contains and directs the steam flow through the turbine

• Rotor: connected to the turbine blades and rotates to generate power

• Bearings: support the rotor and reduce friction

• Governor: regulates the speed o
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Q2. Tell us about the Woodward 505 ?
Ans. 
Woodward 505 is a versatile control system used in industrial applications.
• The Woodward 505 is a widely used control system in industries such as power generation, oil and gas, and marine.

• It offers advanced features like PID control, sequencing, and communication capabilities.

• The Woodward 505 is known for its reliability and robustness in harsh operating environments.

• It can be easily integrated with various types of se
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Q3. Explain the structure of the Honeywell DCS ?
Ans. 
The Honeywell DCS (Distributed Control System) is a modular system consisting of controllers, I/O modules, and operator stations.
• Consists of controllers, I/O modules, and operator stations

• Uses a network to communicate between components

• Allows for centralized control and monitoring of processes

• Supports various communication protocols such as Modbus, OPC, etc.

• Example: Honeywell Experion PKS
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Q4. What is PID and How does it work ?
Ans. 
PID stands for Proportional-Integral-Derivative, a control loop feedback mechanism used in engineering.
• PID is a control algorithm that calculates an error value as the difference between a desired setpoint and a measured process variable.

• Proportional (P) control responds to the current error value.

• Integral (I) control accumulates past errors to correct the present error.

• Derivative (D) control predicts future errors bas...read more
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Q5. How to assign new chennal in Honeywell DCS ?
Ans. 
To assign a new channel in Honeywell DCS, you need to access the configuration software and follow the steps to add the channel.
• Access the Honeywell DCS configuration software

• Navigate to the channel configuration section

• Add a new channel by specifying the channel number, type, and other relevant parameters

• Save the changes and verify the new channel is successfully assigned
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Q6. Tell the interlock and permissive of boiler and turbine?
Ans. 
Interlocks and permissives are safety mechanisms in place to prevent unsafe operation of boiler and turbine systems.
• Interlocks prevent certain actions from taking place unless specific conditions are met

• Permissives allow certain actions to take place only if specific conditions are met

• Example of interlock: Boiler feed pump interlock prevents the boiler from starting unless the feed pump is running

• Example of permissive:...read more
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Basic aptitude from rs agrawal book is sufficient

Q1. There were basic questions from SOM and mechanics
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Achievements in previous experience

Q1. Technically full worthful
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Q2. What is ur chievements in ur previous experience
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Q1. HYDRAULIC diagram
Ans. 
A hydraulic diagram shows the flow of hydraulic fluid in a system.
• Hydraulic diagrams use symbols to represent components like pumps, valves, cylinders, and motors.

• Arrows indicate the direction of fluid flow in the system.

• Lines connecting components show how they are connected and interact.

• Common symbols include a pump symbol for hydraulic pumps, a valve symbol for control valves, and a cylinder symbol for hydraulic cyl
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Q2. Single line diagram
Ans. 
A single line diagram is a simplified representation of an electrical power system.
• Shows the main components of the system and their connections

• Used for planning, designing, and analyzing power systems

• Helps in troubleshooting and maintenance

• Commonly used in electrical engineering and related fields
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