10+ SAEL Industries Limited Interview Questions and Answers

DCS and PLC are control systems used in industrial automation. Currently, we are using DCS.

• DCS stands for Distributed Control System and is used for large-scale industrial processes.

• PLC stands for Programmable Logic Controller and is used for smaller, discrete processes.

• DCS allows for centralized control and monitoring of multiple processes, while PLC is more suited for standalone machines.

• Our company uses DCS for our manufacturing processes due to their complexity and scale.

I have 5 years of experience in Boiler Turbine, ESP, and BAG FILTER EPCI projects.

• 5 years of experience in Boiler Turbine projects

• Familiar with ESP (Electrostatic Precipitator) systems

• Proficient in BAG FILTER EPCI (Engineering, Procurement, Construction, and Installation)

• Managed various projects involving Boiler Turbine, ESP, and BAG FILTER systems

• Implemented cost-effective solutions for improving efficiency

Chain conveyors use chains to move products, while belt conveyors use belts.

• Chain conveyors are more durable and can handle heavier loads than belt conveyors.

• Belt conveyors are better suited for transporting smaller items and have a smoother operation.

• Chain conveyors are commonly used in industries such as automotive and steel, while belt conveyors are used in industries such as food processing and packaging.

• Chain conveyors require more maintenance than belt conveyors due to ...read more

The welding process used in water wall panels is typically TIG welding.

• TIG welding is commonly used for water wall panels due to its precision and clean welds

• TIG welding helps prevent contamination in the weld area, which is crucial for water wall panels

• Other welding processes like MIG welding or submerged arc welding may also be used depending on the specific requirements

Boiler pressure parts are typically made of carbon steel, alloy steel, or stainless steel to withstand high pressure and temperature.

• Carbon steel is commonly used for lower pressure boilers

• Alloy steel is used for higher pressure boilers

• Stainless steel is used for corrosion resistance in boilers

• Materials must meet specific standards like ASTM A516 for carbon steel

I would prioritize communication and collaboration with technical experts to find a solution.

• Identify the issue and its impact on operations

• Consult with technical experts to understand the root cause

• Collaborate with the team to develop a plan of action

• Communicate updates and progress to stakeholders

• Evaluate the effectiveness of the solution and make adjustments as needed

Working in electrical motor involves converting electrical energy into mechanical energy to drive various machines and devices.

• Converting electrical energy into mechanical energy

• Utilizing magnetic fields to create motion

• Controlling speed and direction of rotation

• Maintenance and troubleshooting of motor components

Bearings and couplings are essential components in mechanical systems.

• Types of bearings: ball bearings, roller bearings, plain bearings, magnetic bearings, fluid bearings

• Types of couplings: rigid couplings, flexible couplings, fluid couplings, magnetic couplings

• Bearings support rotating shafts and reduce friction, while couplings connect two shafts together

• Examples of bearings and couplings used in mechanical systems: journal bearings, gear couplings, disc couplings, elastome...read more

RTD measures temperature using resistance while TC measures using voltage.

• RTD stands for Resistance Temperature Detector while TC stands for Thermocouple.

• RTD measures temperature by detecting the change in resistance of a metal wire while TC measures temperature by detecting the voltage generated by two different metals.

• RTD is more accurate and stable than TC but is also more expensive.

• TC can measure a wider range of temperatures than RTD.

• Examples of RTD metals include platin...read more

The erection process of a boiler involves assembling and installing all the components to create a functional boiler system.

• Prepare the foundation for the boiler

• Assemble the boiler components such as tubes, drums, and headers

• Install the boiler on the foundation

• Connect the necessary piping and valves

• Test the boiler for proper functioning

Types of electrical panel circuits include main circuits, branch circuits, control circuits, and distribution circuits.

• Main circuits provide power to the entire electrical panel.

• Branch circuits supply power to specific areas or devices.

• Control circuits are used to operate equipment or machinery.

• Distribution circuits distribute power to various parts of a building or facility.

Transformers are devices that transfer electrical energy between two or more circuits through electromagnetic induction.

• Step-up transformer: increases voltage

• Step-down transformer: decreases voltage

• Isolation transformer: prevents direct current flow between circuits

• Auto transformer: single winding with multiple taps for voltage adjustment

Spark Dataset is a distributed collection of data organized into named columns.

• It is an extension of the Spark DataFrame API.

• It provides type-safe, object-oriented programming interface.

• It offers better performance and optimization compared to DataFrames.

• Example: val dataset = spark.read.json("path/to/file").as[MyCaseClass]