Assertion A: Slow sand filters are more efficient in removal of bacteria than rapid sand filters. Reason R : The sand used in slow sand filters is finer than that in rapid sand filters. Select your answer based on the coding system given below?

Environmental Engineering 19/01/2022

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

Related Mcqs:

    The most common cause of acidity in water is_______________?
    A. carbon dioxide B. oxygen C. hydrogen D. nitrogen...
    Disinfection efficiency is________________?
    A. reduced at higher pH value of water B. unaffected by pH value of water C. increased at higher pH value of water D. highest at pH value equal to 7...
    The maximum efficiency of BOD removal is achieved in______________?
    A. oxidation pond B. oxidation ditch C. aerated lagoons D. trickling filters...
    The design discharge for the combined sewer system shall be taken as________________?
    A. equal to rainfall B. rainfall + DWF C. rainfall + 2 DWF D. rainfall + 6 DWF...
    The settling velocity of a particle in a sedimentation tank depends on__________________?
    A. depth of tank B. surface area of tank C. both depth and surface area of tank D. none of the above...

Leave a Reply

Your email address will not be published. Required fields are marked *