Question

1. which unit operation prevents equipment from overheating?

a) reactor
b) separator
c) heat exchanger
d) pump

1. why are pfds useful for technicians?

a) they provide big - picture views only
b) they show detailed flow and equipment
c) they guarantee 100% yield
d) they replace mass balances

1. which best summarizes passage 2?

a) unit operations, pfds, and mass balance importance
b) why feedstock becomes paper
c) how off - spec products harm profits
d) why throughput is always high
writing response (wr2): using evidence from the passage, explain why mass balance is important. what risks might occur if missing mass is ignored?

Explanation:

For question 28, a heat - exchanger is used to transfer heat and prevent overheating. For 29, PFDs (Process Flow Diagrams) show detailed flow of equipment. For 30, the passage likely focuses on unit operations, PFDs, and mass - balance importance. In the writing response, mass balance is important for accurate process control and cost - effectiveness. Ignoring missing mass can lead to inaccurate process understanding, waste, and potential safety hazards.

Answer:

1. c) Heat exchanger
2. b) They show detailed flow of equipment
3. a) Unit operations, PFDs, and mass balance importance

Writing Response (WR2): Mass balance is crucial for accurate process control and cost - effectiveness. Ignoring missing mass can cause inaccurate process understanding, waste, and safety risks.