1000 to 2000
3000 to 6000
6000 to 9000
10000 to 100000
✅ The correct answer is option D.
Enviornmental Engineering MCQs
Salt content in sea water is about __________ percent.
0.5
1
3.5
10
✅ The correct answer is option C.
CFC (chloro fluoro carbon) is very highly reactive in causing depletion of ozone layer in the atmosphere. Each atom of chlorine liberated from CFC is capable of decomposing __________ molecules of ozones.
10²
10⁵
10⁹
10¹⁵
✅ The correct answer is option B.
Persons working in cement plants and limestone quarries are more prone to disease like
Cancer
Asthma
Silicosis
Flourosis (bone disease)
✅ The correct answer is option C.
Exposure to small amount of __________ results in high blood pressure & heart disease in human beings.
Hydrogen sulphide
Mercury
Cadmium
Asbestos
✅ The correct answer is option C.
Main pollutants released from iron & steel industry is
CO, CO₂ & SO₂
H₂S, NO & SO₃
CO₂, H₂S & NO₂
SO₃, NO₂ & CO₂
✅ The correct answer is option A.
Bag filter design is predominantly dependent on gas temperature, as it affects the gas density & viscosity and the selection of filtering material. The pressure drop in a bag filter is
Inversely proportional to viscosity of gas
Proportional to the viscosity & density of the gas
Proportional to the pressure of the gas
Both B and C
✅ The correct answer is option D.
Inhalation of silica dust by human being during hand drilling in mica mining, lead & zinc mining, silica refractory manufacture and in foundaries causes
Asphyxiation (suffocation)
Shortness of breath
Tuberculosis
All of the above
✅ The correct answer is option D.
The common pollutant generated in chlor-alkali industry and battery manufacture is
Mercury
Brine
Phosphate
None of these
✅ The correct answer is option A.
Ambient noise level can be reduced by __________ decibels by planting trees (like coconut, neem etc.) near public utility buildings (like hospitals & schools).
1-Feb
5-Oct
15-20
25-30
✅ The correct answer is option B.