2. in a paper - mill, which material is the feedstock?\n a) pulp\n b) wood chips\n c) drying machines\n d)…

2. in a paper - mill, which material is the feedstock?\n a) pulp\n b) wood chips\n c) drying machines\n d) ink\n3. throughput refers to:\n a) the percentage of feedstock turned into product\n b) the movement of materials on a diagram\n c) how much material is processed in each time\n d) the final products quality\n4. a refinery producing 10,000 barrels per day is describing its:\n a) refinery\n b) throughput\n c) off - spec production\n d) mass balance\n5. if 200 lbs of feedstock produces 160 lbs of product, the yield is:\n a) 80%\n b) 20%\n c) 100%\n d) 50%\n6. high yield usually means:\n a) more waste and lower profit\n b) less waste and higher profit\n c) products are off - spec\n d) lower throughput\n7. an off - spec product is one that:\n a) meets safety standards\n b) is produced at high yield\n c) fails to meet quality standards\n d) increases throughput\n8. off - spec products are dangerous because they:\n a) waste money and harm reputation\n b) improve yield and safety\n c) increase throughput\n d) always make higher profits

2. in a paper - mill, which material is the feedstock?\n a) pulp\n b) wood chips\n c) drying machines\n d) ink\n3. throughput refers to:\n a) the percentage of feedstock turned into product\n b) the movement of materials on a diagram\n c) how much material is processed in each time\n d) the final products quality\n4. a refinery producing 10,000 barrels per day is describing its:\n a) refinery\n b) throughput\n c) off - spec production\n d) mass balance\n5. if 200 lbs of feedstock produces 160 lbs of product, the yield is:\n a) 80%\n b) 20%\n c) 100%\n d) 50%\n6. high yield usually means:\n a) more waste and lower profit\n b) less waste and higher profit\n c) products are off - spec\n d) lower throughput\n7. an off - spec product is one that:\n a) meets safety standards\n b) is produced at high yield\n c) fails to meet quality standards\n d) increases throughput\n8. off - spec products are dangerous because they:\n a) waste money and harm reputation\n b) improve yield and safety\n c) increase throughput\n d) always make higher profits

Answer

Explanation:

Step1: Define yield formula

Yield = $\frac{\text{Mass of product}}{\text{Mass of feed - stock}}\times100%$

Step2: Calculate yield for question 5

Given mass of feed - stock = 200 lbs and mass of product = 160 lbs. Yield = $\frac{160}{200}\times100% = 80%$

Step3: Understand high - yield concept for question 6

High yield means more of the feed - stock is converted into product, so less waste and higher profit.

Step4: Define off - spec product for question 7

An off - spec product fails to meet quality standards.

Step5: Understand danger of off - spec products for question 8

Off - spec products waste money (due to re - work or disposal) and harm reputation.

Answer:

  1. a) Wood chips
  2. a) The percentage of feedstock turned into product
  3. b) Throughput
  4. a) 80%
  5. b) Less waste and higher profit
  6. c) Fails to meet quality standards
  7. a) Waste money and harm reputation