MCQGeeks
0 : 0 : 1
CBSE
JEE
NTSE
NEET
English
UK Quiz
Quiz
Driving Test
Practice
Games
Quiz
Chemical Engineering
Environmental Engineering In CE
Quiz 3
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
Q.1
What is the major constituents of waste/polluted water discharged from textile, pulp & paper, tanning, distillary, dairy and meat packing industries?
Radioactive substances
Natural organic products
Inorganic pollutants
None of these
Q.2
Water filtration rate in a slow sand filter ranges from __________ litres/m²/hr.
10 to 20
100 to 200
1500 to 2500
4000 to 5000
Q.3
Main pollutants released from iron & steel industry is
CO, CO₂ & SO₂
H₂S, NO & SO₃
CO₂, H₂S & NO₂
SO₃, NO₂ & CO₂
Q.4
Shouting by a man at his full voice corresponds to a voice level of about __________ decibels.
25
50
80
120
Q.5
COD of raw municipal sewage may be in the range of about __________ mg/litre.
1-2
5-10
90-120
1500-2500
Q.6
Which of the following is the most lethal water pollutant?
Phenol and cynide
Chlorine
Alkalis
Suspended solids
Q.7
The amount of chemical coagulant added for treatment of polluted water __________ with increase in temperature of the polluted water to be treated.
Decreases
Increases
Remains constant
May increase or decrease ; depends on the chemical characteristics of polluted water
Q.8
Noise level in a quiet private business office is about __________ decibels.
25
50
70
85
Q.9
Noise level heard at a distance of about 100 metres from a jet engine with after burner is about __________ decibels.
120
140
170
200
Q.10
Presence of carbon monoxide in atmosphere produced by decomposition of chlorophyl and haemoglobin breakdown of some animals, beyond TLV (>50 ppm)
Acts as a green house gas thereby raising earth's temperature
Causes asphyxia
Causes increase in sea level
Inhances the green house effect
Q.11
Suspended solid present in the waste water generated in blast furnace gas cooling and cleaning plant is removed by
Biological oxygen pond
Radial settling tank (thickener) using coagulant (lime & ferrous sulphate)
Lagoons
Filtration
Q.12
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.
Hydrogen
Carbon dioxide
Ozone
None of these
Q.13
The principal gas evolved from sludge digestion tank is
CO
CO₂
CH₄
N₂
Q.14
Pick out the wrong statement pertaining to 'green house' for the plants.
'Green house' (made of glass) allows visible sunlight (i.e., short wavelength solar radiation like ultra-violet rays) to pass through the glass and heat up the soil thereby warming up plants inside it
The emitted longer wavelength radiation (e.g., infrared) is partly reflected and partly absorbed by the glass of the green house
'Green house effect' in earth's atmosphere is due to increasing CO₂ level in atmosphere. where CO₂ acts like the glass of 'green house' thereby warming up the earth's surface
'Green house' is colder than the outside atmosphere
Q.15
BOD of raw municipal sewage may be in the range of about __________ mg/litre.
1-2
5-10
150-300
2000-3000
Q.16
Presence of dissolved impurities of __________ is responsible for the red brownish color of water.
Carbonates
Bi-carbonates
Iron & manganese
Arsenic
Q.17
Major sources of noise in furnace operation arises from air inspirators, combustion, side wall vibrations and fluctuation in the process heat load. A 50% increase in fuel firing rate may increase the furnace noise level by about __________ decibels.
3
30
70
100
Q.18
Maximum permissible limit of industrial noise as recommended by World Health Organisation (WHO) is __________ decibels.
35
75
95
105
Q.19
Fluorosis is caused due to the presence of excessive amount of __________ in drinking water.
Mercury
Lead
Fluoride
Arsenic
Q.20
Coal mines drainage waste water (acidic in nature) results from the earth's water percolating through the voids created in coal bed during mining. This polluted water which either drains out naturally to water courses or are removed before starting the mining is
Neutralised by alkali treatment
Left as such without any treatment
Diluted with fresh water to reduce its acidity
None of these
Q.21
Insufficient washing of sand grains in a rapid sand filter causes
Air binding
Shrinkage of filtering media
Mud balls
Expansion of filtering media
Q.22
Coal washing waste water containing about 3% suspended solids (comprising of clay, slate, stone etc.) is treated for solid particles removal
By chemical coagulation
In sedimentation tanks equipped with mechanical scrapper
In vacuum filter
In clarifiers
Q.23
Nitrogen oxides (NOx) is not produced in the __________ industry.
Nitric acid making
Nitrogenous fertiliser
Detergent
Any of these
Q.24
Which of the following pollutants, if present in atmosphere is detectable by its odour?
CO
SO₂
NO₂
CO₂
Q.25
Polluted water having low BOD are most economically treated in
Sedimentation tanks
Oxidation ponds
Sludge digester
Clarifier
Q.26
Color test of water is done with an instrument called
Tintometer
Colorimeter
Electro-chemical cell
Turbidimeter
Q.27
Presence of __________ in water stream are deleterious to aquatic life.
Soluble and toxic organics
Suspended solids
Heavy metals and cynides
All of the above
Q.28
Presence of __________ hardness is responsible for the temporary hardness in water.
Carbonate
Calcium
Choride
Sulphate
Q.29
Radioactive solid nuclear wastes are disposed off by
High temperature incineration
Pathological incineration
Pyrolysis
Underground burial in concrete containers
Q.30
Particulates (< 1μm size) remaining suspended in air indefinitely and transported by wind currents are called
Fumes
Mists
Smoke
Aerosols
0 h : 0 m : 1 s
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
Report Question
×
What's an issue?
Question is wrong
Answer is wrong
Other Reason
Want to elaborate a bit more? (optional)
Support mcqgeeks.com by disabling your adblocker.
×
Please disable the adBlock and continue.
Thank you.
Reload page