ENVIRONMENTAL ENGINEERING IN CE QUIZ

Suspended solid present in the waste water generated in blast furnace gas cooling and cleaning plant is removed by

Filtration

Lagoons

Radial settling tank (thickener) using coagulant (lime & ferrous sulphate)

Biological oxygen pond

TRUE ANSWER : ?
YOUR ANSWER : ?

Noise level heard at a distance of about 100 metres from a jet engine with after burner is about __________ decibels.

140

120

200

170

TRUE ANSWER : ?
YOUR ANSWER : ?

Smog is not formed due to the presence of __________ in the atmosphere.

SO₂

NOx

CO₂

Any of these

TRUE ANSWER : ?
YOUR ANSWER : ?

Coal washing waste water containing about 3% suspended solids (comprising of clay, slate, stone etc.) is treated for solid particles removal

In sedimentation tanks equipped with mechanical scrapper

By chemical coagulation

In vacuum filter

In clarifiers

TRUE ANSWER : ?
YOUR ANSWER : ?

In a sedimentation tank, the detention period for water ranges from __________ hours.

8 to 12

24 to 32

2 to 4

16 to 20

TRUE ANSWER : ?
YOUR ANSWER : ?

Turbidity of water is an indication of the presence of

Suspended inorganic matter

Floating solids

Dissolved solids

Dissolved gases

TRUE ANSWER : ?
YOUR ANSWER : ?

Smoke is produced due to

Poor quality of fuel and improper mixing of fuel & combustion air

Poor design & overloading of furnace

Insufficient supply of combustion air and insufficient time for combustion

All of these

TRUE ANSWER : ?
YOUR ANSWER : ?

Carbonaceous particles having size less than 1 μm are called

Grit

Aggregates

Smoke

Aerosols

TRUE ANSWER : ?
YOUR ANSWER : ?

Presence of iron and manganese in water causes

Reduction in its dissolved oxygen content

Temporary hardness

None of these

Discoloration of bathroom fixtures

TRUE ANSWER : ?
YOUR ANSWER : ?

Arsenic pollutant is not generated in____industries.

Beverages

Any of these

Tanneries

Glass & ceramic

TRUE ANSWER : ?
YOUR ANSWER : ?