Defence Research & Development Laboratory Interview Questions and Answers

Mineral oil is a clear, colorless, odorless, and tasteless oil derived from petroleum.

• Mineral oil is commonly used in cosmetics, pharmaceuticals, and as a lubricant.

• It is often used as a laxative to relieve constipation.

• Mineral oil can also be found in baby oil and various skincare products.

• It is important to note that mineral oil should not be ingested in large quantities as it can cause health issues.

I have 5 years of experience in selling lubricants to industrial clients, achieving 20% growth in sales each year.

• Developed strong relationships with key clients in the industrial sector

• Identified and pursued new business opportunities in the lubricants market

• Provided technical expertise and support to clients in selecting the right lubricants for their needs

• Consistently met or exceeded sales targets through effective

Lubricants are substances used to reduce friction between surfaces in mutual contact, which ultimately reduces the heat generated when the surfaces move.

• Lubricants can be in the form of oils, greases, or solid lubricants.

• They are used in various industries such as automotive, manufacturing, and aerospace.

• Lubricants help to extend the lifespan of machinery by reducing wear and tear on moving parts.

• They also help to impr...read more

MCO, PCMO, and CVO lubricants are different types of lubricants used in various industries for different purposes.

• MCO stands for Marine Cylinder Oil, used in marine engines to reduce friction and wear.

• PCMO stands for Passenger Car Motor Oil, used in automotive engines to lubricate moving parts and reduce heat.

• CVO stands for Commercial Vehicle Oil, used in heavy-duty vehicles like trucks and buses to provide lubrication

Lubricants 20w40 and 10w30 differ in their viscosity grades, with 20w40 being thicker and better suited for high temperatures.

• 20w40 has a higher viscosity grade compared to 10w30

• 10w30 is thinner and flows more easily in cold temperatures

• 20w40 is better suited for high temperature environments

• 10w30 may provide better fuel economy due to lower viscosity

15w40 and 5w30 are different types of lubricants used in vehicles, with varying viscosity and temperature ranges.

• 15w40 has a higher viscosity compared to 5w30

• 5w30 is better suited for colder temperatures due to its lower viscosity

• 15w40 is commonly used in diesel engines while 5w30 is used in gasoline engines