Gandhar Oil Refinery India Quality Control Chemist Trainee Interview Questions and Answers

Coal is a fossil fuel formed from plant material that has been subjected to high pressure and heat over millions of years.

• Coal is primarily composed of carbon, along with small amounts of other elements like sulfur, hydrogen, oxygen, and nitrogen.

• There are different types of coal based on their carbon content and energy value, such as anthracite, bituminous, and lignite.

• Coal is used as a fuel for power generation, indu...read more

TM stands for trademark, a symbol used to indicate that a particular product or service is legally protected.

• TM is used to protect logos, brand names, and slogans from being used by others without permission.

• It does not provide as much legal protection as a registered trademark (R), but still offers some level of protection.

• TM symbol can be used even before a trademark is officially registered.

• Example: Nike uses the TM...read more

The ash content of coal can be determined by burning a sample of coal and measuring the residue left behind.

• Burn a sample of coal in a controlled environment

• Collect the residue left behind after burning

• Weigh the residue to determine the ash content