Chemical Environmental Engineering Quiz 1
1 / 50
_______ is the process of killing organism in water ?
2 / 50
A considerable part of the harmful ultraviolet radiation of the sum does not reach the earth surface, because of the fact that, there is a layer of ______ high above earth?s atmosphere, which absorbs it?
3 / 50
Aerosols present in atmospheric air may be___________?
4 / 50
Carbonaceous particles having size less than 1 ?m are called_____?
5 / 50
COD of raw municipal sewage may be in the range of about ______ mg/litre?
6 / 50
Carcinogenic air pollutants cause___________?
7 / 50
?Pneumoconiosis? is a disease caused by the inhalation of _______ dust?
8 / 50
_______ cannot control the noise pollution ?
9 / 50
During sewage treatment, the sewage is subjected to _______ treatment in Imhoff tank?
10 / 50
?Safe limit? called Threshold Limit Value (TLV) of carbon monoxide in atmospheric air is < 50 ppm. The main source of carbon monoxide pollutant in air is the______?
11 / 50
Corrosion in boilers can be prevented by __________?
12 / 50
A man exposed to excessive noise level in the working environment may suffer from______?
13 / 50
______ plant emits large amount of SO2 as an air pollutant?
14 / 50
Black smoke coming out of the chimney of a furnace is an indication of the use of _______ in the furnace?
15 / 50
A gas is termed as non-toxic, if its maximum permissible concentration (TLV) ranges from _______ ppm?
16 / 50
Death may occur, when SO2 concentration in atmospheric air exceeds _______ ppm?
17 / 50
A standard test for determination of hardness in water is termed as _______ test?
18 / 50
Atmospheric pollution caused by the exhaust gas of supersonic transport air-crafts is mostly in the atmospheric region called_________?
19 / 50
Direct reaction of unsaturated hydrocarbons with either NO or NO2 produces an eye irritating pollutant compound known as_________?
20 / 50
A shallow pond in which the sewage is retained and biologically treated is called___________?
21 / 50
CFC (chloro fluoro carbon) is very highly reactive in causing depletion of ozone layer in the atmosphere. Each atom of chlorine liberated from CFC is capable of decomposing _________ molecules of ozone?
22 / 50
Aerodynamic noise resulting from turbulent gas flow is the most prevalent source of valve noise in fluid flow control. It is caused due to__________?
23 / 50
BOD of raw municipal sewage may be in the range of about ______ mg/litre?
24 / 50
5-200 ?m size particles are called___________?
25 / 50
Bag filter design is predominantly dependent on gas temperature, as it affects the gas density & viscosity and the selection of filtering material. The pressure drop in a bag filter is___________?
26 / 50
?Particulate? air pollutants are finely divided solids and liquids. Which of the following is not a ?particulate? ?
27 / 50
Disinfection of water is done to remove ________?
28 / 50
During which of the following operating conditions of an automobile, carbon monoxide content in the exhaust gas is maximum ?
29 / 50
Acute danger to human life (i.e. death) exists, if the concentration of CO2 in atmospheric air exceeds _______ percent (by volume)?
30 / 50
Ethanolamine is an absorbent used for the removal of ______ from air/gas?
31 / 50
Carbon monoxide is a pollutant, which causes__________?
32 / 50
_____ is removed from water by lime-soda process?
33 / 50
Dust collection efficiency of a cyclone separator depends upon its_______?
34 / 50
80% less than 200 mesh size particles are called______?
35 / 50
Bacterial aerobic oxidation of polluted water in biological oxidation ponds is done to purify it. Presence of bacteria helps in______?
36 / 50
Aerobic biological oxidation ponds used for the purification of polluted water___________?
37 / 50
Biological oxidation ponds remove organic matters present in the polluted water by ________?
38 / 50
Arsenic pollutant is not generated in ________ industries?
39 / 50
Dissolved oxygen content in river water is around ______ ppm?
40 / 50
Beyond what concentration of H2S in air, acute danger to human life exists ?
41 / 50
A ?body? which allows the short wavelength incoming solar radiation to enter in, but does not allow long wave length outgoing infra red radiation to escape out is called the_________?
42 / 50
Automobile exhaust is passed through two compartments catalytic converter employing platinum as catalyst for_____?
43 / 50
Deaeration of high pressure boiler feed water is done to reduce _____?
44 / 50
Disinfection of water is done to destroy pathogenic bacteria and thus prevent water-borne diseases. Disinfection of water may be done by the use of__________?
45 / 50
A masonry structure built below ground level, where biochemical reaction takes place due to anaerobic bacteria is called_____?
46 / 50
_____ substances present in sewage are removed in grit chamber during sewage treatment?
47 / 50
_______ content of the phosphate rock is the pollutant of primary interest in a phosphatic fertiliser plant ?
48 / 50
Brown spots in fabrics will be caused by washing with water containing large amount of_____?
49 / 50
As per the world health organisation (WHO) specification, the maximum permissible concentration (i.e., TLV) of particulate matter in air is ______ ?g/m3.(?g-microgram)?
50 / 50
Color test of water is done with an instrument called___________?
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