NEW
Font size
WorksheetsEnvironmental Engineering
Total questions: 20
Worksheet time: 10mins
Suspended solids are measured by which of the following?
Turbidity rod
Gravimetric test
Chromatography
Jackson’s turbidity meter
The maximum permissible limit for suspended solids is ____________
10 mg/l
20 mg/l
30 mg/l
40 mg/l
Which method is used to measure the color of water?
Gravimetric analysis
Chromatography
Tintometer method
Hydrometer analysis
1 TCU (True Color Unit) is equivalent to _____
The color produced by 1 g of platinum cobalt
The color produced by 1 mg of platinum cobalt
The color produced by 1 mg of platinum cobalt in 1L of distilled water
The color produced by 1 mg of platinum cobalt in 1mL of distilled water
Which of the following statement is wrong regarding turbidity?
It is an extent to which light is absorbed by particles in the water
It is expressed in ppm
It depends on the fineness of particle present in the water
Turbidity rod is a laboratory method to measure turbidity
In which unit operation, gases are released or absorbed in the water?
Gas transfer
Ion transfer
Solute stabilization
Solids Transfer
Which of the following process is used to remove the colloidal particles from water?
Chemical precipitation
Chemical coagulation
Ion exchange
Adsorption
Flocculation of iron from water by the addition of lime is an example of which of the following process?
Chemical precipitation
Chemical coagulation
Ion exchange
Adsorption
Organic contaminants are removed from the water by the process of ______
Water softening
Demineralization
Absorption
Adsorption
Which of the following represents the physical characteristics of water?
Chloride content
BOD
Turbidity
COD
Which of the following instrument is used to measure turbidity?
Olfactometer
Turbidity meter
Colorimeter
Spectrophotometer
Which color indicates the fresh sewage?
Pink
Red
Black
Grey
Identify the incorrect statement from the following?
High odor intensity indicates odorless water
Fresh sewage is odorless
Turbidity can be measured by turbidity rod
NTU is a unit of turbidity
The wastewater from the kitchen is an example of __________
Black water
Yellow water
Green water
Grey water
The aerobic decomposition of carbonaceous organic matter gives __________
Nitrites and water
Carbon dioxide and water
Sulfates and water
Nitrogen and Ammonia
The permissible concentration of PM 10 in the air is ___________
60μg/m3
40μg/m3
50μg/m3
20μg/m3
The dilution factor is expressed by _____________
Volume of diluted sample + Volume of sewage
Volume of diluted sample / Volume of sewage
Volume of diluted sample – Volume of sewage
Volume of diluted sample* Volume of sewage
The tolerance limit of pH value of sewage to be discharged into sea water is ____________
1-5ppm
2-9ppm
5.5-9ppm
6-10ppm
. _______ is the velocity at which the solid matter in sewage remained in suspended form
Settling velocity
Self cleansing velocity
Mean velocity
Non Scouring velocity
Which of the following removes both gaseous and particulate contaminants?
Venturi scrubber
Gravitational settling chamber
Dynamic precipitator
Wet scrubber
