Preparation of Powdered Coal and Coke SRM Blends

The video tutorial explains the process of creating a sulfur standard with a 1% concentration using coals 2693 and 2692 B. It covers the steps of weighing and equilibrating coal samples, preparing the sulfur crucible, and calculating the final sulfur concentration. The tutorial emphasizes the importance of accurate measurements and moisture determinations to achieve precise sulfur standards.

What is the target sulfur concentration for the standard being prepared?

• 0.5%

• 1%

• 2%

• 1.5%

Why is it important to equilibrate coal 2693 with the room atmosphere before weighing?

• To make it easier to handle

• To decrease its moisture content

• To ensure it doesn't change weight during weighing

• To increase its weight

What is the approximate weight of coal 2693 that is initially weighed out?

• 3-4 grams

• 1-2 grams

• 5-6 grams

• 7-8 grams

What is the purpose of weighing coal 2692 B?

• To mix it with coal 2693 for the sulfur standard

• To measure its moisture content

• To determine its density

• To test its purity

How much of the sample is added to the sulfur crucible to make the total weight approximately 250 milligrams?

• 130 milligrams

• 60 milligrams

• 250 milligrams

• 190 milligrams

What is the final sulfur concentration of the combined components?

• 1.5%

• 1%

• 2%

• 0.5%

What is done after the moisture determinations are completed?

• The samples are discarded

• The exact concentration of the standard is determined

• The samples are mixed again

• The samples are heated