Chemical Environmental Engineering

Which of the following is not a source of ozone emission in the atmosphere?

Byadmin March 11, 2019August 29, 2021

Which of the following is not a source of ozone emission in the atmosphere?

A. Refrigerators
B. Xerox machines
C. Dermatological photo-therapy equipments
D. High voltage electrical equipments

Chemical Environmental Engineering

Which of the following is not a natural source of air pollution ?

Which of the following is not a natural source of air pollution ?

A. Volcanic eruptions and lightening discharges
B. Biological decay of vegetable matter
C. Photochemical oxidation of organic matter
D. None of these

Read More Which of the following is not a natural source of air pollution ?
Chemical Environmental Engineering

Shouting by a man at his full voice corresponds to a voice level of about _____________ decibels?

Shouting by a man at his full voice corresponds to a voice level of about _____________ decibels?

A. 25
B. 50
C. 80
D. 120

Read More Shouting by a man at his full voice corresponds to a voice level of about _____________ decibels?
Chemical Environmental Engineering

Sulphur dioxide present in the industrial chimney exhaust gases causes____________________?

Sulphur dioxide present in the industrial chimney exhaust gases causes____________________?

A. Respiratory & lung disease
B. Reduction in plant’s productivity owing to acid rain
C. Corrosion of building materials
D. All A., B. and C.

Read More Sulphur dioxide present in the industrial chimney exhaust gases causes____________________?
Chemical Environmental Engineering

Black smoke coming out of the chimney of a furnace is an indication of the use of ______________ in the furnace?

Black smoke coming out of the chimney of a furnace is an indication of the use of ______________ in the furnace?

A. Low amount of excess combustion air
B. Large quantity of excess combustion air
C. Hydrocarbon fuel
D. Pulverised coal as fuel

Read More Black smoke coming out of the chimney of a furnace is an indication of the use of ______________ in the furnace?
Chemical Environmental Engineering

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

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

A. Highly
B. Moderately
C. Extremely
D. Very extremely

Read More Permissible safe limit (TLV) of _____________ toxic gas is 100-1000 parts per million (ppm)?
Chemical Environmental Engineering

The common pollutant generated in chlor-alkali industry and battery manufacture is ___________________?

The common pollutant generated in chlor-alkali industry and battery manufacture is ___________________?

A. Mercury
B. Brine
C. Phosphate
D. None of these

Read More The common pollutant generated in chlor-alkali industry and battery manufacture is ___________________?

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