Test: Environmental Engineering - 7 - Civil Engineering (CE) MCQ

Presence of iron and manganese in water causes

Septic tanks are used for the __________ of the deposited solids.

Death may occur, when SO₂ concentration in atmospheric air exceeds __________ ppm.

Which of the following acts as a natural source of air pollution ?

Higher concentration of CO₂ in atmosphere

Permissible safe limit (TLV) of __________ toxic gas is 100-1000 parts per million (ppm).

Radioactive substances present in the polluted water stream can be removed by

In the context of the chemical process industries, the term BOD is normally associated with the

Noise emitted by a ventilation fan at a distance of 3 metres is about __________ decibels.

Inhalation of silica dust causes a disease called

Solid content in most of the domestic sewage is about __________ percent.

In troposphere (the weather domain), the temperature 't' at height 'h' above the spa level in metres is given by (where, temperature at sea level is 15^oC and t is in ^oC.)

High noise level in a chemical plant can be controlled by the

Limestone powder is injected during pulverised coal burning in boilers to __________ the flue gases.

Main pollutants released from petroleum refineries is

Maximum permissible limit of industrial noise as recommended by World Health Organisation (WHO) is __________ decibels.

Which of the following is a green house gas other than CO₂ ?

Automobile exhaust is passed through two compartments catalytic converter employing platinum as catalyst for

Lagooning process is mainly a means of the

Carbon monoxide is a pollutant, which causes

Pollution by particulate matter emission in the atmosphere does not take place during metal

Direct reaction of unsaturated hydrocarbons with either NO or NO₂ produces an eye irritating pollutant compound known as