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► MCQ Exam ON : Water Treatment

Biological oxidation processes usually referred as biological treatment, are the most common form of

1)		secondary treatment
2)		primary treatment
3)		all of these
4)		tertiary treatment
5)		NULL

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Important MCQ on Related Subject

📌	Secondary treatment uses __________ to consume wastes.

📌	Which of the following physical method is used as germicidal in modern time for the treatment of drinking water?

📌	The maximum permissible limit (BIS) of turbidity in drinking water is

📌	Zeolite softening process removes both temporary and permanent hardness of water. In this process the calcium and magnesium present in water are precipitated as

📌	Inhibitors are used along with sanitizer to

📌	Temporary hardness of water may be removed by adding

📌	Hardness of water does not

📌	Coliform bacteria in water is an indication of the presence of

📌	Conventional tertiary treatment is

📌	When temporary hard water is boiled, one of the substances formed is

📌	The chemical oxygen demand (COD)measures the

📌	Permanent hard water may be softened by passing it through

📌	The methods used for biological treatment are

📌	Biological oxidation processes usually referred as biological treatment, are the most common form of

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📌	The activated sludge process is sometime referred as

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📌	BOD stands for

📌	Sedimentation is a physical process used in wastewater treatment to

📌	The maximum desirable limit (BIS) of total hardness (as CaCo3) in drinking water is

📌	The activated sludge process consists of returning a portion of the clarifier

📌	Temporary hardness of water is caused by the presence of

📌	From the following sanitizers which one comes under category of surface active agents?

📌	Sanitizer used specifically for vitreous enamel are

📌	Permanent hardness of water may be removed by the addition of

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📌	Zeolite used in zeolite softening process for the treatment of hard water gets exhausted after certain time of usage but can be regenerated by flushing it with

📌	Sanitizers used for rubber made equipments are

📌	Acid used mostly for removal of milk stone is

📌	The common methods used for disinfection in waste water treatment plants are

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