Question # 1

Which of the following metal acts as pollutant.

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Hg

Pb

Zn

Ni

All above

Which of the following level is an indicator of hearing loss.

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> 25 dB

< 25 dB

<20 dB

None of these

The main active contaminants of uranium processing are.

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U - 235

U-238

Pu -234

All above

A man has to think of alternate sources of energy due to

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Shortage of vehicles

Shortage of fossil fuels

Construction of house

Running of power plant

Which of the following gas protects us form harmful effect of uv radiation.

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SO2

NO2

CO

O3

Which of the following statement is not true with respect to hydrocarbons.

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They are gaseous and liquids

They can be saturated or unsaturated

They in air by themselves alone cause harmful effects

They form photochemical oxidants

The alternate feasible fuel for existence of mankind to

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Uranium

Wood

Bontonite

Cloth residues

The maximum noise level at which a man can work for 8 hours is.

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80 dB

70 dB

90 dB

60 dB

Which of the following material is a constituent of crop residue.

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Cull

Fruit

vines

Bagasse

All above

Acute toxicity is expressed by the term

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LD50

IC50

I 1/2

Mean life

Which of the following is not a chemical pollutant.

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Solid waste

Noiso

Insecticides

Liquid waste

Environmental pollution effects.

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Biotic component

Plants only

Humans only

Both biotic and abiotic components of environment

Environmental pollution refers to.

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Peeling of top soil

Dissipation of energy

Release of toxic materials in environment

None of the above

The key element to be considered when evaluating a health hazard is.

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The amount of material the employee is exposed.

The total time of exposure

The toxicity of the substance

All above

Water that easily forms a lather of films and frotha when agitated with a soap solution called.

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Hard water

Heavy water

Soft water

Washing water

Which of the following phenomenon are driven by solar energy.

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Winds

Water cycle

Production of biomass

All above

Which of the following health effect is caused by cadmium.

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Hypertension

Cardiovascular problem

Kidney damage

All above

Which of the following techniques are used for minimizing water pollution.

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Stabilization of ecosystem

Recharge of the waste

Waste treatment

All above

Pesticide residues appear in which of the following foods.

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Milk

Fruit

Fish

Vegetables

All above

Water is often treated with chlorine to

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Increases oxygen content

Kill germs

Cause sedimentation

Remove insoluble impurities.

Temporary hardness of water is due to.

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Bicarbonates of K

Bicarbonates of Na

Carbonates of Ca

Bicarbonates of Ca

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