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Question 10:

When the bottom product contains too much top product, the bottom temperature will drop because the:

A - Bottom product is purer B - Top product is less pure C - Top product has a higher boiling temperature D - Top product has a lower boiling temperature Correctness Rule: Single Correct Answer Required Answer(s) Given: D Correct Answer(s): D Question 1:

The plant fractionator is producing top product that is 93% pure and bottom product that is 93% pure. All the controls and instruments have been checked and there are no problems. What is the cause of the problem and what remedial action should be taken?

A - Cause is: Too much reflux. Remedy: Increase the reflux flow B - Cause is: Not enough reflux. Remedy: Increase the reflux flow C - Cause is: Not enough recycle. Remedy: Increase the reflux flow and add heat to the reboiler D - Cause is: Not enough heat. Remedy: Add heat to the reboiler Correctness Rule: Single Correct Answer Required Answer(s) Given: C Correct Answer(s): C Marked as: Correct _______________________________________________

Question 2:

The plant fractionator is producing top product that is 97% pure and bottom product that is 93% pure. All the controls and instruments have been checked and there are no problems. What is the cause of the problem and what remedial action should be taken?

A - Cause is: Not enough reflux. Remedy: Increase the reflux flow B - Cause is: Not enough heat. Remedy: Add heat to the reboiler C - Cause is: Not enough recycle. Remedy: Increase the reflux flow and add heat to the reboiler D - Cause is: Too much reflux. Remedy: Reduce the reflux flow Correctness Rule: Single Correct Answer Required Answer(s) Given: D Correct Answer(s): D Marked as: Correct _______________________________________________

Question 3:

The plant fractionator is producing top product that is 95% pure and bottom product that is 93% pure. All the controls and instruments have been checked and there are no problems. What is the cause of the problem and what remedial action should be taken?

A - Cause is: Not enough reflux. Remedy: Increase the reflux flow B - Cause is: Not enough heat. Remedy: Add heat to the reboiler C - Cause is: Not enough recycle. Remedy: Increase the reflux flow and add heat to the reboiler D - Cause is: Too much reflux. Remedy: Increase the reflux flow Correctness Rule: Single Correct Answer Required Answer(s) Given: B Correct Answer(s): B Marked as: Correct _______________________________________________

Question 4:

When there is less bottom product in the top product and the top temperature goes down, the effect on product quality is that the:

A - Top product is less pure B - Quality is not affected C - Top product is more pure D - Bottom product is less pure Correctness Rule: Single Correct Answer Required Answer(s) Given: C Correct Answer(s): C Marked as: Correct _______________________________________________

Question 5:

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