Chemical Environmental Engineering

Presence of excess fluorine in water causes__________________?

Byadmin March 11, 2019August 29, 2021

Presence of excess fluorine in water causes__________________?

A. Dental cavity
B. Tooth decay
C. Fluorosis
D. Respiratory disease

Chemical Environmental Engineering

High concentration of carcinogenic hydrocarbon pollutants in atmospheric air causes____________________?

High concentration of carcinogenic hydrocarbon pollutants in atmospheric air causes____________________?

A. Cancer
B. Silicosis
C. Respiratory disease (e.g., asthma)
D. Reduced crop yield

Read More High concentration of carcinogenic hydrocarbon pollutants in atmospheric air causes____________________?
Chemical Environmental Engineering

TLV of lead for public sewer/waste water is about ______________ ppm?

TLV of lead for public sewer/waste water is about ______________ ppm?

A. 1
B. 25
C. 150
D. 650

Read More TLV of lead for public sewer/waste water is about ______________ ppm?
Chemical Environmental Engineering

Disinfection of water is done to remove ______________________?

Disinfection of water is done to remove ______________________?

A. Color
B. Bad taste
C. Foul odour
D. Bacteria

Read More Disinfection of water is done to remove ______________________?
Chemical Environmental Engineering

As per the world health organisation (WHO) specification, the maximum permissible concentration (i.e., TLV) of particulate matter in air is _____________ μg/m3.(μg-microgram)?

As per the world health organisation (WHO) specification, the maximum permissible concentration (i.e., TLV) of particulate matter in air is _____________ μg/m3.(μg-microgram)?

A. 10
B. 90
C. 800
D. 750

Read More As per the world health organisation (WHO) specification, the maximum permissible concentration (i.e., TLV) of particulate matter in air is _____________ μg/m3.(μg-microgram)?
Chemical Environmental Engineering

There are five concentric layers within the atmosphere which is differentiated on the basis of temperature. The atmospheric layer which lies close to the earth’s surface in which human being along with other organisms live is called troposphere. The rate at which air temperature in the troposphere gradually decreases with height is about _____________ °C/km?

There are five concentric layers within the atmosphere which is differentiated on the basis of temperature. The atmospheric layer which lies close to the earth’s surface in which human being along with other organisms live is called troposphere. The rate at which air temperature in the troposphere gradually decreases with height is about _____________ °C/km?

A. 0.05
B. 1
C. 6.5
D. 15

Read More There are five concentric layers within the atmosphere which is differentiated on the basis of temperature. The atmospheric layer which lies close to the earth’s surface in which human being along with other organisms live is called troposphere. The rate at which air temperature in the troposphere gradually decreases with height is about _____________ °C/km?
Chemical Environmental Engineering

Main pollutants released from petroleum refineries is__________________?

Main pollutants released from petroleum refineries is__________________?

A. CO, SO2 & H2S
B. CO2, NO & SO3
C. CO2, H2S & NO2
D. SO3, NO2 & CO2

Read More Main pollutants released from petroleum refineries is__________________?

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