Explore topic-wise MCQs in Waste Water Engineering.

This section includes 26 Mcqs, each offering curated multiple-choice questions to sharpen your Waste Water Engineering knowledge and support exam preparation. Choose a topic below to get started.

1.

What is stoichiometry?

A. A quantitative relationship between reactants and products
B. Defines a qualitative value of the reactants and products
C. Defines the quantity of reactants and products upon reaching equilibrium
D. It defines quantity of only reactants
Answer» B. Defines a qualitative value of the reactants and products
Discussion
2.

What is the combination of using a photocatalyst and UV or visible light for the treatment of wastewater and gaseous pollutants is called?

A. Photocatalysis
B. Super critical water oxidation
C. Advanced oxidation process
D. Wet air oxidation
Answer» B. Super critical water oxidation
Discussion
3.

What does SWOT stand for?

A. Solid Waste Operation and Treatment
B. Storm Water Operation and Treatment
C. Supercritical Water Oxidation
D. Storm and Wastewater Operation and Treatment
Answer» D. Storm and Wastewater Operation and Treatment
Discussion
4.

2NH3 +3O2 -> 2NO2– + ___ + 2H2O.

A. O2
B. 2H+
C. H+
D. 2O2
Answer» C. H+
Discussion
5.

Organic matter + nutrients + O2 → CO2 + H2O + _______

A. Biomass
B. O2
C. Nutrients
D. Organic matter
Answer» B. O2
Discussion
6.

The world’s available fresh water supply is about _______ percent of that total water supply.

A. 10
B. 4
C. 3
D. 7
Answer» D. 7
Discussion
7.

WHAT_DOES_SWOT_STAND_FOR??$

A. Solid Waste Operation and Treatment
B. Storm Water Operation and Treatment
C. Supercritical Water Oxidation
D. Storm and Wastewater Operation and Treatment
Answer» D. Storm and Wastewater Operation and Treatment
Discussion
8.

What is stoichiometry?$

A. A quantitative relationship between reactants and products
B. Defines a qualitative value of the reactants and products
C. Defines the quantity of reactants and products upon reaching equilibrium
D. It defines quantity of only reactants
Answer» B. Defines a qualitative value of the reactants and products
Discussion
9.

What_is_the_combination_of_using_a_photocatalyst_and_UV_or_visible_light_for_the_treatment_of_wastewater_and_gaseous_pollutants_is_called?$

A. Photocatalysis
B. Super critical water oxidation
C. Advanced oxidation process
D. Wet air oxidation
Answer» B. Super critical water oxidation
Discussion
10.

The degradation of BOD is classified as what type of reaction?

A. First Order Reaction
B. Zero Order Reaction
C. Second Order Reaction
D. Third Order Reaction
Answer» B. Zero Order Reaction
Discussion
11.

In water treatment which factor which has a major control over reaction selectivity and product distribution?

A. pH
B. temperature
C. pressure
D. ionic concentration
Answer» B. temperature
Discussion
12.

What is the value of activity coefficients for monovalent and divalent ions for a potable water at an ionic strength of 0.01 M?

A. 0.9 and 0.66 respectively.
B. 0.9 in both the cases
C. 0.66 and 0.9 respectively.
D. 0.66 in both the cases
Answer» B. 0.9 in both the cases
Discussion
13.

In case of Moving Bed Bioreactor and Activated Sludge process which is the factor that limits the rate of the reaction?

A. temperature
B. pressure
C. pH
D. ionic composition
Answer» B. pressure
Discussion
14.

What will be the activity coefficient of a solution consisting of monovalent ions?

A. Equal to 1
B. >1
C. Close to 1
D. <0
Answer» D. <0
Discussion
15.

In dilute solutions which are normally encountered in water treatment what is the value of the activity of coefficient assumed?

A. 0.5
B. 0.75
C. 1.0
D. >1
Answer» D. >1
Discussion
16.

In solutions as ionic concentration increases a non-ideal condition arises. To account for this non-ideal condition due to the ion-ion interaction what is the effective concentration term called as?

A. Activity
B. Dielectric constant
C. Ionic coefficient
D. Ionic strength
Answer» B. Dielectric constant
Discussion
17.

How is iconic strength related to total dissolved solids?

A. I= (2.5 x 10<sup>-5</sup>)TDS
B. I = (2.5 √ó 10<sup>5</sup>) TDS
C. I= 2.5 TDS
D. I = 2.5 x10 TDS
Answer» B. I = (2.5 ‚Äö√†√∂‚àö‚â• 10<sup>5</sup>) TDS
Discussion
18.

What is the rate of a chemical reaction not dependent on?

A. Stoichiometry
B. Surface area of reactants
C. Temperature
D. Pressure
Answer» E.
Discussion
19.

Which among these is the alternative BOD test for determining the oxygen consuming potential of a wastewater sample?

A. ThOD
B. COD
C. BOD
D. TOC
Answer» C. BOD
Discussion
20.

2NH3 +3O2 -> 2NO2– + ___ + 2H2O.$

A. O<sub>2</sub>
B. 2H<sup>+</sup>
C. H<sup>+</sup>
D. 2O<sub>2</sub>
Answer» C. H<sup>+</sup>
Discussion
21.

Organic matter + nutrients + O2 ‚Üí CO2 + H2O + _______$

A. Biomass
B. O<sub>2</sub>
C. Nutrients
D. Organic matter
Answer» B. O<sub>2</sub>
Discussion
22.

The quality of the fish habitat begins to increase when the dissolved oxygen concentration drops below 4 or 5 mg L-1.

A. True
B. False
Answer» C.
Discussion
23.

______ tend to resist conventional methods of wastewater treatment.

A. Suspended solids
B. Nutrients
C. Refractory organics
D. Priority pollutants
Answer» D. Priority pollutants
Discussion
24.

Which of the following related to the aerobic organic matter is true?

A. Essential nutrients for growth
B. Development of sludge deposits
C. Growth of undesirable aquatic life
D. Development of septic conditions
Answer» E.
Discussion
25.

The world’s available fresh water supply is about _______ percent of that total water supply.$

A. 10
B. 4
C. 3
D. 7
Answer» D. 7
Discussion
26.

The chemical composition of wastewater naturally reflects the origin from which it came.

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