Header Ads

Basic lubrication Job Interview Questions and Answers – 2019 {HD}!!!

Basic lubrication Job Interview Questions and Answers – 2019 {HD}!!!


Question No: 1 What Is API Gravity?
Answer :
API means American Petroleum Institute; it is the main association for the oil and natural gas industry in U.S. The API denotes about 400 corporations in the petroleum industry and helps to set the standard for production, refinement and distribution of petroleum product.
Question Number 2: What is Specific gravity?
Answer: Specific gravity is the ratio of the density of a substance to the density of a reference substance; equivalently, it is the ratio of the mass of a substance to the mass of a reference substance for the same given volume. Apparent specific gravity is the ratio of the weight of a volume of the substance to the weight of an equal volume of the reference substance.
Question Number 3: What is flash point & pour point?
Answer: The flash point of a flammable liquid is the lowest temperature at which it can form an ignitable mixture in air.
The pour point of a liquid is the lowest temperature at which it will pour or flow under prescribed conditions. It is a rough indication of the lowest temperature at which oil is readily pumped able.
Question Number 4: What is Viscosity Index?
Answer: Viscosity index (VI) is an arbitrary measure for the change of viscosity with variations in temperature. The lower the VI, the greater the change of viscosity of the oil with temperature and vice versa. It is used to characterize viscosity changes with relation to temperature in lubricating oil.
Question Number 5: What is Cloud Point?
Answer: The Cloud point of a fluid is the temperature at which dissolved solids are no longer completely soluble, precipitating as a second phase giving the fluid a cloudy appearance. This term is relevant to several applications with different consequences.

To get the answer see the full video.............
 

No comments

Powered by Blogger.