A. disinfection
B. removing hardness
C. removing odours
D. removing corrosiveness
Related Mcqs:
- The type of valve, which is provided on the suction pipe in a tube-well, is____________?
A. air relief valve
B. reflux valve
C. pressure relief valve
D. sluice valve - The detention period and overflow rate respectively for plain sedimentation as compared to sedimentation with coagulation are generally_______________?
A. less and more
B. less and less
C. more and less
D. more and more - A pipe conveying sewage from plumbing system of a single building to common sewer or point of immediate disposal is called________________?
A. house sewer
B. lateral sewer
C. main sewer
D. submain sewer - Sewage treatment units are normally designed for______________?
A. 5-10 years
B. 15-20 years
C. 30-40 years
D. 40-50 years - Most of the bacteria in sewage are______________?
A. parasitic
B. saprophytic
C. pathogenic
D. anaerobic - Dissolved oxygen in streams is______________?
A. maximum at noon
B. minimum at noon
C. maximum at midnight
D. same throughout the day - A sewer that receives the discharge of a number of house sewers is called________________?
A. house sewer
B. lateral sewer
C. intercepting sewer
D. submain sewer - Double filtration is used_______________?
A. to increase the filtration slow sand filters capacity of
B. to increase the filtration rapid sand filters capacity of
C. for isolated buildings like pools, hotels etc swimming
D. all of the above - Which of the following values of pH represents a stronger acid?
A. 2
B. 5
C. 7
D. 10 - Assertion A : The consumption of water increases with increase in the distribution pressure. Reason R : Higher distribution pressure causes more loss and waste of water. Select your answer according to the coding system given below?
A. Both A and R are true and R is the correct explanation of A
B. Both A and R are true but R is not the correct explanation of A
C. A is true but R is false
D. A is false but R is true
