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Water-and-waste-water Questions Set 31:

Quiz Mode

Blue baby disease (methemoglobinemia) in children is caused by the presence of excess

chlorides

nitrates

fluorides

lead

Solution:

Which device is used to supply air for the agitation of sand grains during washing of filters?

Rate control device

Tube settler

Air compressors

Flocculator

Solution:

Which of the following water/wastewater tests uses Erichrome Black T as an indicator?

Hardness

Residual chlorine

Chemical Oxygen Demand (COD)

Dissolved Oxygen (DO)

Solution:

The organism which exhibits very nearly the characteristics of an ideal pathogenic indicator is

Entamoeba histolytica

Escherichia coli

Salmonella typhi

Vibrio comma

Solution:

The self-cleansing velocity in a sewer depends on:

1. Slope of the sewer

2. Ratio of depth of flow sewage to sewer diameter ratio

1 and 2 only

1, 2 and 3

1 and 2 only

2 and 3 only

Solution:

Which of the following types of settling phenomena can be analyzed using the classic sedimentation laws of Newton and Stokes?

Discrete settling

Flocculent settling

Hindered settling

Compression settling

Solution:

Which of the following are removed by a rapid sand filter from water?

Suspended solids, bacteria, and helminths

Dissolved solids and suspended solids

Suspended solids and bacteria

Dissolved solids and bacteria

Solution:

Which combination of surface water quality parameters will indicate sweep coagulation as the preferred mechanism of coagulation?

High turbidity-low alkalinity

High turbidity-high alkalinity

Low turbidity-high alkalinity

Low turbidity-low alkalinity

Solution:

The effective size (ES) of sand and its uniformity coefficient (UC) are the usually specified parameters for sand filters. In slow sand filters, as compared to rapid sand filters,

ES is less but UC is more

ES is more but UC is less

both ES and UC are more

both ES and UC are less

Solution:

The use of coagulants such as alum in water treatment typically:

Results in a reduction of the pH of the treated water

Results in an increase in the pH of the treated water

Results in no change in the pH of the treated water

May result in either an increase or decrease in the pH of the treated water

Water-and-waste-water Questions Set 31:

Blue baby disease (methemoglobinemia) in children is caused by the presence of excess

Solution:

Which device is used to supply air for the agitation of sand grains during washing of filters?

Solution:

Which of the following water/wastewater tests uses Erichrome Black T as an indicator?

Solution:

The organism which exhibits very nearly the characteristics of an ideal pathogenic indicator is

Solution:

The self-cleansing velocity in a sewer depends on:

1. Slope of the sewer

2. Ratio of depth of flow sewage to sewer diameter ratio

Solution:

Which of the following types of settling phenomena can be analyzed using the classic sedimentation laws of Newton and Stokes?

Solution:

Which of the following are removed by a rapid sand filter from water?

Solution:

Which combination of surface water quality parameters will indicate sweep coagulation as the preferred mechanism of coagulation?

Solution:

The effective size (ES) of sand and its uniformity coefficient (UC) are the usually specified parameters for sand filters. In slow sand filters, as compared to rapid sand filters,

Solution:

The use of coagulants such as alum in water treatment typically:

Solution:

Related Question Sets:

Related Topics:

Water-and-waste-water Questions Set 31:

Blue baby disease (methemoglobinemia) in children is caused by the presence of excess

Solution:

Which device is used to supply air for the agitation of sand grains during washing of filters?

Solution:

Which of the following water/wastewater tests uses Erichrome Black T as an indicator?

Solution:

The organism which exhibits very nearly the characteristics of an ideal pathogenic indicator is

Solution:

The self-cleansing velocity in a sewer depends on: 1. Slope of the sewer 2. Ratio of depth of flow sewage to sewer diameter ratio

Solution:

Which of the following types of settling phenomena can be analyzed using the classic sedimentation laws of Newton and Stokes?

Solution:

Which of the following are removed by a rapid sand filter from water?

Solution:

Which combination of surface water quality parameters will indicate sweep coagulation as the preferred mechanism of coagulation?

Solution:

The effective size (ES) of sand and its uniformity coefficient (UC) are the usually specified parameters for sand filters. In slow sand filters, as compared to rapid sand filters,

Solution:

The use of coagulants such as alum in water treatment typically:

Solution:

Related Question Sets:

Related Topics:

The self-cleansing velocity in a sewer depends on:

1. Slope of the sewer

2. Ratio of depth of flow sewage to sewer diameter ratio