Explore topic-wise MCQs in Chemical Reaction Engineering.

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 &amp; 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 &amp; 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 &amp; 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 &amp; 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 &amp; 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.
Kinetics of microbial fermentation cannot be expressed by Monod kinetics.

A. True
B. False
Answer» C.