Test: Environmental Engineering - 3 - Civil Engineering (CE) MCQ

The main industrial source of emission of hydrogen sulphide air pollutant is

Waste/polluted water discharged from electroplating, blast furnace and coal mining industries contain mainly __________ substances.

Sound produced by an automobile horn heard at a distance of 1.5 metres corresponds to about __________ decibels.

Moist atmospheric air at high temperature (e.g., in summer) having high concentration of sulphur dioxide causes

Nitrogen oxides (NO_x) is not produced in the __________ industry.

World's worst radioactive pollution was caused by nuclear reactor disaster which occured in

Dissolved oxygen content in river water is around __________ ppm.

Oil and grease present in an emulsified state in waste water discharged from industries can be removed by

The amount of chemical coagulant added for treatment of polluted water __________ with increase in temperature of the polluted water to be treated.

Particles having diameter greater than 75 μm (micrometer = 10^-6 mm) are called

Which of the following is the most severe air pollutant ?

Presence of bacteria in potable (drinking) water causes

What are the methods of treatment & disposal of radioactive wastes ?

Bacterial aerobic oxidation of polluted water in biological oxidation ponds is done to purify it. Presence of bacteria helps in

Main pollutant present in automobile exhaust is

Maximum allowable noise exposure limits for a man working for 8 hours a day in a noisy chemical plant is about __________ decibels.

Industrial workers working in leather tanning & manufacturing units are prone to suffer from

Pick out the wrong statement.

Peroxyacyl nitrate (PAN), a pollutant is found in the

Foaming and priming in boiler operation can be reduced by reduction in __________ in feed water.

Ambient noise level can be reduced by __________ decibels by planting trees (like coconut, neem etc.) near public utility buildings (like hospitals & schools).

Pick out the wrong statement.