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This section includes 9 Mcqs, each offering curated multiple-choice questions to sharpen your Chemical Reaction Engineering knowledge and support exam preparation. Choose a topic below to get started.
1. |
The fractional yield of C with respect to A for the reaction A (^{ underrightarrow{C}} ) cC + rR is the ratio of ____ |
A. | All R formed to all A reacted |
B. | All A reacted to all R formed |
C. | All A reacted to all C formed |
D. | All C formed to all A reacted |
Answer» E. | |
2. |
The relationship between the Monod rate constant, k and the rate constant observed due to waste accumulation kobs is ____ |
A. | k<sub>obs</sub> = k (1- ( frac{C_R}{C_R^*} ))<sup>n</sup> |
B. | k<sub>obs</sub> = k (1- ( frac{C_R}{C_R^*})^ frac{1}{n} ) |
C. | k = k<sub>obs</sub> (1- ( frac{C_R}{C_R^*} ))<sup>n</sup> |
D. | k<sub>obs</sub> = k ( ( frac{C_R}{C_R^*} ))<sup>n</sup> |
E. | nC<sub>R</sub>* is the concentration of R where cell activity stops and n is the order of product poisoning. |
Answer» B. k<sub>obs</sub> = k (1- ( frac{C_R}{C_R^*})^ frac{1}{n} ) | |
3. |
With an accumulation of waste formed during the reaction, the value of observed Monod rate constant ____ |
A. | Decreases |
B. | Increases |
C. | Remains constant |
D. | First decreases and then increases |
Answer» B. Increases | |
4. |
In a batch fermenter, for substrate limiting kinetics, CC,max is ________ |
A. | Independent of C<sub>A0</sub> |
B. | Directly proportional to C<sub>A0</sub> |
C. | Inversely proportional to C<sub>A0</sub> |
D. | Proportional to the square of C<sub>A0</sub> |
Answer» C. Inversely proportional to C<sub>A0</sub> | |
5. |
The poison limiting kinetics of A (^{ underrightarrow{C}} ) C + R is the one in which ___ |
A. | Final concentration of C depends on initial amount of food |
B. | Final concentration of C does not depend on initial amount of food |
C. | Final concentration of C does not exceed a certain value |
D. | The rate depends on enzyme concentration |
Answer» D. The rate depends on enzyme concentration | |
6. |
The substrate limiting kinetics of A (^{ underrightarrow{C}} ) C + R is the one in which ___ |
A. | Final concentration of C depends on initial amount of food |
B. | Final concentration of C does not depend on initial amount of food |
C. | Final concentration of C does not exceed a certain value |
D. | The rate depends on enzyme concentration |
Answer» B. Final concentration of C does not depend on initial amount of food | |
7. |
The hierarchy of phases for the microbes in a fermentation process is ____ |
A. | Exponential growth phase Lag phase Stationary phase Death phase |
B. | Stationary phase Lag phase Exponential growth phase Death phase |
C. | Lag phase Exponential growth phase Stationary phase Death phase |
D. | Lag phase Stationary phase Exponential growth phase Death phase |
Answer» D. Lag phase Stationary phase Exponential growth phase Death phase | |
8. |
The plot representing the slope of growth curve and CA is ____ |
A. | <img alt="The plot representing the slope of growth curve & CA - option a" class="alignnone size-full wp-image-284335" height="341" sizes="(max-width: 364px) 100vw, 364px" src="https://www.sanfoundry.com/wp-content/uploads/2020/07/chemical-reaction-engineering-questions-answers-microbial-fermentation-1-q2a.png" srcset="https://www.sanfoundry.com/wp-content/uploads/2020/07/chemical-reaction-engineering-questions-answers-microbial-fermentation-1-q2a.png 364w, https://www.sanfoundry.com/wp-content/uploads/2020/07/chemical-reaction-engineering-questions-answers-microbial-fermentation-1-q2a-300x281.png 300w" width="364"/> |
B. | <img alt="The plot representing the slope of growth curve & CA - option b" class="alignnone size-full wp-image-284334" height="344" sizes="(max-width: 376px) 100vw, 376px" src="https://www.sanfoundry.com/wp-content/uploads/2020/07/chemical-reaction-engineering-questions-answers-microbial-fermentation-1-q2b.png" srcset="https://www.sanfoundry.com/wp-content/uploads/2020/07/chemical-reaction-engineering-questions-answers-microbial-fermentation-1-q2b.png 376w, https://www.sanfoundry.com/wp-content/uploads/2020/07/chemical-reaction-engineering-questions-answers-microbial-fermentation-1-q2b-300x274.png 300w" width="376"/> |
C. | <img alt="The plot representing the slope of growth curve & CA - option c" class="alignnone size-full wp-image-284333" height="344" sizes="(max-width: 372px) 100vw, 372px" src="https://www.sanfoundry.com/wp-content/uploads/2020/07/chemical-reaction-engineering-questions-answers-microbial-fermentation-1-q2c.png" srcset="https://www.sanfoundry.com/wp-content/uploads/2020/07/chemical-reaction-engineering-questions-answers-microbial-fermentation-1-q2c.png 372w, https://www.sanfoundry.com/wp-content/uploads/2020/07/chemical-reaction-engineering-questions-answers-microbial-fermentation-1-q2c-300x277.png 300w" width="372"/> |
D. | <img alt="The plot representing the slope of growth curve & CA - option d" class="alignnone size-full wp-image-284332" height="337" sizes="(max-width: 381px) 100vw, 381px" src="https://www.sanfoundry.com/wp-content/uploads/2020/07/chemical-reaction-engineering-questions-answers-microbial-fermentation-1-q2d.png" srcset="https://www.sanfoundry.com/wp-content/uploads/2020/07/chemical-reaction-engineering-questions-answers-microbial-fermentation-1-q2d.png 381w, https://www.sanfoundry.com/wp-content/uploads/2020/07/chemical-reaction-engineering-questions-answers-microbial-fermentation-1-q2d-300x265.png 300w" width="381"/> |
Answer» B. <img alt="The plot representing the slope of growth curve & CA - option b" class="alignnone size-full wp-image-284334" height="344" sizes="(max-width: 376px) 100vw, 376px" src="https://www.sanfoundry.com/wp-content/uploads/2020/07/chemical-reaction-engineering-questions-answers-microbial-fermentation-1-q2b.png" srcset="https://www.sanfoundry.com/wp-content/uploads/2020/07/chemical-reaction-engineering-questions-answers-microbial-fermentation-1-q2b.png 376w, https://www.sanfoundry.com/wp-content/uploads/2020/07/chemical-reaction-engineering-questions-answers-microbial-fermentation-1-q2b-300x274.png 300w" width="376"/> | |
9. |
State true or false.
|
A. | True |
B. | False |
Answer» C. | |