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.
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