Explore topic-wise MCQs in Environmental Engineering.

This section includes 8 Mcqs, each offering curated multiple-choice questions to sharpen your Environmental Engineering knowledge and support exam preparation. Choose a topic below to get started.

1.

The temperature of disinfection is inversely proportional to the killing of organisms.

A. True
B. False
Answer» C.
Discussion
2.

Efficiency of dilution decreases rapidly when the coefficient of dilution is ____________

A. 0
B. 1
C. <1
D. >1
Answer» E.
Discussion
3.

The number of organisms in disinfection process can be expressed by ____________

A. C<sup>n</sup> *t <sub>p</sub> = Constant
B. C <sup>n</sup> / t<sub>p</sub> = Constant
C. C <sup>q</sup> * N<sub>p</sub> = Constant
D. C <sup>q</sup> / N<sub>p</sub> = Constant
Answer» D. C <sup>q</sup> / N<sub>p</sub> = Constant
Discussion
4.

For changing the concentration of disinfectant, the disinfecting efficiency is expressed by ____________

A. C n *t p = Constant
B. C n/ t p = Constant
C. C q * Np = Constant
D. C q / Np = Constant
Answer» B. C n/ t p = Constant
Discussion
5.

The expression loge N1/N = kt m Where m is a constant such that m>1 represents ____________

A. Rate of the kill will remains constant with time
B. Rate of the kill will increase with time
C. Rate of the kill will decrease with time
D. Rate of the kill is directly proportional to time
Answer» C. Rate of the kill will decrease with time
Discussion
6.

The number of organisms destroyed is equal to the number of organisms remaining at time t = __________

A. 0
B. 1
C. 2
D. 10
Answer» B. 1
Discussion
7.

The dimensional formula of rate constant used in Chicks law is ____________

A. 1/t
B. 1/t<sup>2</sup>
C. 1/t<sup>3</sup>
D. t<sup>2</sup>
Answer» B. 1/t<sup>2</sup>
Discussion
8.

The integration of the expression of Chicks law is given by ____________

A. N1/N = e<sup>kt</sup>
B. N1/N = kt
C. N1/N = k/t
D. N1/N = e<sup>-kt</sup>
Answer» E.
Discussion