5
100
1000
2000
✅ The correct answer is option A.
Enviornmental Engineering MCQs
A standard test for determination of hardness in water is termed as __________ test.
EDTA
Electometric
Total count
Presumptive
✅ The correct answer is option A.
COD of raw municipal sewage may be in the range of about __________ mg/litre.
1-Feb
5-Oct
90-120
1500-2500
✅ The correct answer is option C.
Exposure to chemicals having carcinogenic properties cause
Dermatitis (skin disorder)
Cancer
Asphyxiation
Asthma
✅ The correct answer is option B.
TLV of aldrin in public water supply system is about __________ μg/litre.
0.5
17
357
1097
✅ The correct answer is option B.
There are five concentric layers within the atmosphere which is differentiated on the basis of temperature. The atmospheric layer which lies close to the earth’s surface in which human being along with other organisms live is called troposphere. The rate at which air temperature in the troposphere gradually decreases with height is about __________ °C/km.
0.05
1
6.5
15
✅ The correct answer is option C.
Soluble silica present in boiler feed water can be removed by
Coagulation
Filtration
Anion exchanger
Preheating it
✅ The correct answer is option C.
5-200 μm size particles are called
Colloids or aerosols
Powder
Dust
Smoke
✅ The correct answer is option A.
Methyl iso-cynate (MIC) gas (TLV <1 ppm), which caused Bhopal gas tragedy in 1984 falls under the category of __________ toxic gas.
Moderately
Highly
Extremely
Very extremely
✅ The correct answer is option D.
Color test of water is done with an instrument called
Tintometer
Colorimeter
Electro-chemical cell
Turbidimeter
✅ The correct answer is option A.