Top 250+ Solved Waste Water Treatment MCQ Questions Answer
Q. What is the minimum quantity of dissolved oxygen that should be present in the treated sewage?
a. 6ppm
b. 4ppm
c. 1ppm
d. 10ppm
Q. The presence of which of the following in sewage indicates nitrogen content before decomposition ofsewage?
a. Nitrites
b. Nitrates
c. Free ammonia
d. Albuminoid nitrogen
Q. The presence of free ammonia in sewage represents ____________
a. Air pollution
b. Old pollution
c. Recent pollution
d. Water pollution
Q. Which chemical is used for the titration of waste water for finding its chloride content?
a. Potassium chloride
b. Sodium chloride
c. Potassium chromate
d. Potassium dichromate
Q. The type of solids which floats in sewage is __________
a. Suspended solids
b. Settleable solids
c. Dissolved solids
d. Total solids
Q. The presence of which of the following indicates old pollution?
a. Nitrates
b. Nitrites
c. H2S
d. Sulfates
Q. ________ is used to find the D.O content of sewage.
a. Winkler method
b. Chromatography
c. Kjeldahl method
d. Olfactometer
Q. The permissible dose of chloride in domestic sewage is __________
a. 120ppm
b. 10ppm
c. 1ppm
d. 250ppm
Q. Imhoff cone is used to measure the _______
a. Suspended solids
b. Settleable solids
c. Dissolved solids
d. Total solids
Q. The decomposition of sewage takes place, causing a pungent smell. Which of the following causes thepungent smell?
a. CO2
b. H2SO4
c. HCL
d. H2S
Q. Which of the following disease is caused due to lack of nitrates?
a. Diphtheria
b. Methemoglobinemia
c. Tuberculosis
d. Meningitis
Q. The maximum quantity of dissolved oxygen present in wastewater is called __________
a. Saturated dissolved oxygen
b. Maximum dissolved oxygen
c. Optimal dissolved oxygen
d. Peak dissolved oxygen
Q. The Clean Water Act (CWA) regulates __________
a. Discharge of pollutants into the waters of the United States
b. Discharge of pollutants into the waters of the United Kingdom
c. Discharge of pollutants into the air of the United States
d. Discharge of pollutants into the waters of India
Q. Section __________ of CWA regulates discharges of hazardous substances.
a. 311(b)(2)(B)
b. 311(b)(2)(A)
c. 312(b)(2)(A)
d. 311(b)(1)(A)