Study Questions

Apply Your Knowledge

2.8
For this home heating system, identify the
objectives that should be achieved by a control system.

Operating Conditions

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Safety
  Environmental Protection
  Equipment
  Smooth Operation
  Product Quality
  Profit
  Monitoring

 

 

 

 

 

 

 

 

 

 

2.9
Given the following histogram, how close can the average temperature be to the
maximum temperature limit of 420 K.  You can assume that the variation does not change.

Operating Conditions

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2.10
Given a CSTR with the reaction below, what would be the best operating temperature to maximize the production of B?

Operating Conditions

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Very High
Operating Temperature


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Where E is the activation energy
Intermediate
Operating Temperature






Very Low
Operating Temperature




 

 

 

 

 

 

 

 

 

 

2.11
Answer the following questions.

Benefits of Low Variability

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i
Explain frequency distribution (histogram).

 

ii

 

Given plant data on a variable, describe the steps you would perform in preparing a frequency distribution.

 

iii What is the value of the sum of the frequency values over all intervals?

 

 

 

 

 

 

 

 

 

 

 

2.12
Variation occurs in all factors of our everyday lives.  From the examples below discuss which of the variability, if any,
you would find acceptable.

Benefits of Low Variability

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Variable Variability #1 Variability #2 Period of Variation
Room Temperature 21 2C 21 7C 1 hour
Velocity of an Automobile on the Highway 103 5 km/h 100 25 km/h 5 min
Hot Water in a Shower 50 12C 50 2C 3 min
Baking a Cake 350 10F 350 15F 10 min