Lubrizol Corporation Electrician Interview Questions and Answers for Experienced

An extruder is a machine used to melt and shape plastic or metal into a continuous profile.

• The extruder is used in the manufacturing of products such as pipes, tubing, and wire insulation.

• It works by feeding raw material into a heated barrel where it is melted and then forced through a die to create the desired shape.

• The extruder can be used with a variety of materials including thermoplastics, rubber, and metal alloys

Weighing vessels are used to measure the weight of substances accurately.

• Weighing vessels are commonly used in laboratories and industries to measure the weight of substances.

• They are designed to hold the substance being weighed and provide accurate measurements.

• Examples of weighing vessels include beakers, flasks, and crucibles.

• They are made of materials such as glass, plastic, or metal depending on the substance bein...read more

Engineering materials are used to create products that meet specific functional requirements.

• Engineering materials are selected based on their properties such as strength, durability, and conductivity.

• They are used to create products that meet specific functional requirements such as load-bearing structures, electrical circuits, and heat-resistant components.

• Examples of engineering materials include metals, polymers, c...read more

To enhance the property of a material, one can modify its composition, structure, or processing techniques.

• Add or remove certain elements to change the material's properties

• Alter the crystal structure to improve strength or conductivity

• Change the processing temperature or pressure to affect the material's properties

• Use surface treatments to improve properties like corrosion resistance

• Combine different materials to crea

I perform a variety of tests including diagnostic tests, troubleshooting tests, performance tests, and quality assurance tests.

• Diagnostic tests to identify issues or problems

• Troubleshooting tests to pinpoint the cause of malfunctions

• Performance tests to evaluate the functionality of systems or equipment

• Quality assurance tests to ensure products meet standards

Adhesion test is performed by applying a specific force to determine the strength of adhesion between two materials.

• Prepare the surfaces to be tested by cleaning and ensuring they are dry

• Apply a specific force to the surfaces, such as using a pull-off tester for coatings

• Measure the force required to separate the materials to determine adhesion strength

• Repeat the test multiple times for accuracy

• Record and analyze the re

Raw materials for paint include pigments, binders, solvents, and additives.

• Pigments: Provide color and opacity to the paint (e.g. titanium dioxide, iron oxide)

• Binders: Holds the pigment particles together and adhere them to the surface (e.g. acrylic, alkyd)

• Solvents: Help in the application and drying of the paint (e.g. water, mineral spirits)

• Additives: Enhance properties like durability, flow, and drying time (e.g. ant