Environmental Issues Test

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Environmental Issues Test - 77

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Weekly Quiz Competition

Question 1
1 / -0

Biomedical waste may be disposed of by

A
Incineration

B
Autoclaving

C
Land filling

D
Both B and C

Solution

Biomedical waste may be infectious waste include discarded blood, sharps, unwanted microbiological cultures and stocks, body parts after amputation. The wastes may also include bandages and dressings, discarded gloves, other medical supplies that may have been in contact with blood and body fluids, and laboratory waste. This waste is highly infectious. The method used for the disposal of biomedical waste is incineration. Incinerators are operated at very high temperatures. This temperature kills and destroys the microorganisms and pathogens. Autoclaving is done for reusable products like gloves.
So, the correct answer is option A.
Question 2
1 / -0

Electronic devices consist of materials such as _____, which are a challenge to recycle.

A
Lead

B
Copper

C
Gold

D
All of the above

Solution

Audiovisual components, televisions, VCRs, stereo equipment, mobile phones, other handheld devices and computer components contain valuable elements and substances suitable for reclamation, including lead, copper and gold. One of the major challenges is recycling the printed circuit boards from the electronic wastes. The circuit boards contain such precious metals as gold, silver, platinum, etc., and such base metals as copper, iron, aluminium, etc.
Question 3
1 / -0

In year 2010, Cobalt-60 accident occurred in _____

A
Chernobyl

B
Japan

C
Delhi

D
Chennai

Solution

Carelessly discarded radioactive material may cause severe damage as it happened in mayapuri Delhi in 2010, The radioactive wastes (Co-60) from a research institute somehow reached the market Street through kabaris .
Question 4
1 / -0

Study the following lists
List I List II
A) BOD I) Treatment of sewage
B) KVIC II) Measure of organic matter in water
C) LAB III) Biological methods for controlling plant diseases
D) STPS IV) Increases vitamin $$B_{12}$$
V) Production of biogas

A
A- IV, B- III, C- II, D- V

B
A- V, B- II, C- III, D- I

C
A- II, B- I, C- IV, D- V

D
A- II, B- V, C- IV, D- I

Solution

BOD is biochemical oxygen demand which refers to the amount of oxygen that would be consumed if all the organics in one liter of water were oxidized by the bacteria. So, A matches with II
KVIC is the model of floating drum model of biogas which uses a metal gas holder that floats in the slurry. So, B matches with V.
STPs are sewage treatment plants. So, D matches with I.
Thus, the correct answer is (D)
Question 5
1 / -0

Biomedical wastes are disposal into different colored containers for collecting different types of waste.

A
True

B
False

C
Ambiguous

D
Data insufficient

Solution

Collection and transportation of biomedical waste is done in a scientific way. They disinfect transportation vehicle regularly. The waste management is mechanisms are done through different franchises.
Question 6
1 / -0

According to Bharat IV, the emission of carbon monoxide should be

A
0.18 gm/km

B
0.1 gm/km

C
0.5 gm/km

D
1 gm/km

Solution

There are certain regulation standards put forward by the Bharat stage IV to reduce the emission of the air pollutants from the vehicles. There are various stages and the norms which are set to reduce the emissions of gases like CO, SO$$_x$$, hydrocarbons, etc. The emission limit for carbon monoxide is set to be below 1 gm/km for the automobiles.
Thus, the correct answer is option D.
Question 7
1 / -0

Which of these is an example of an ecological intervention?
I. Toxic site remediation
II. Large-scale reforestation
III. Introduction of new species

A
I only

B
II only

C
III only

D
I and III only

E
I, II and III

Solution

Ecological intervention is use of conventional ways to deal with environment emergencies for its protection and conservation.
I. Toxic site remediation is the removal of contaminants and other polluting substances from the site.
II. Large scale reforestation is the plantation of trees for removing pollution from the atmosphere.
III. Introduction of new species to increase the biodiversity is also a conventional way of ecosystem conservation.
So, the correct answer is 'I, II and III'.

Question 8

1 / -0

Match the column:

List I	List II	List III
A) BOD	i) Supernatant as effluent	I) Useful aerobic microbes
B) Flocs	ii) Measure of organic Matter	II) All settled solids
C) Primary sludge	iii) Masses of bacteria associated with fungus	III) Methane, hydrogen, sulphide, carbon dioxide
D) Biogas	iv) Anaerobic sludge digester	IV) Polluting water has more BOD

A-ii, IV B-iii, I C-i, II D-iv, III

A-ii, I B-i, III C-iv, II D-iii, IV

A-i, IV B-iii, II C-iv, I D-ii, III

A-ii, III B-ii, IV C-iii, I D-i, II

Solution

BOD is the biological oxygen demand. It is the amount of oxygen required by microorganisms in water.
It is the measure of the amount of organic matter present in the water body. In polluting water, BOD is high as it contains a large number of organisms.
Floc is a mesh-like structure formed by the association of bacteria and fungal filaments in sewage treatment.
Biological floc is made up of useful aerobic microbes.
Primary treatment involves the removal of suspended and settled solid waste material. The supernatant acts as effluent.
Biogas typically refers to a mixture of different gases produced by the breakdown of much organic matter anaerobically.
Biogas is mainly comprised of carbon dioxide, methane, sulfide, and hydrogen.

Thus, the correct answer is option A.

Question 9
1 / -0

The relative contribution of various green house gases to global warming is given in the following diagram:
Identify the green house gases.

A
$$ A=CO_2; B = CH_4; C = N_2O; D= CFCs$$

B
$$ A=CO_2; B = CFCs; C = CH_4; D=N_2O$$

C
$$ A=CFCs; B=CO_2; C = CH_4; D=N_2O$$

D
$$ A = CFCs; B = CH_4; C = CO_2; D=N_2O$$

Solution

Greenhouse gases are gases that absorb and emit radiation within the thermal infrared range. Carbon dioxide contributes mostly to global warming which is followed by methane, nitrous oxide and CFC.
So, the correct answer is option A.
Question 10
1 / -0

Relationship between DO and BOD is that they

A
Are directly proportional

B
Are inversely proportional

C
Are not related

D
Always remain equal to each other

Solution

Dissolved Oxygen (DO) is the amount of oxygen dissolved in the water system. It is measured in ppm. Biochemical oxygen demand (BOD, also called biological oxygen demand) is the amount of dissolved oxygen needed (i.e., demanded) by aerobic biological organisms to break down organic material present in a given water sample at certain temperature over a specific time period. The BOD of the natural water system is about 4 ppm. The importance of DO is significant as it supports the aquatic life within the system if the amount of DO is to low then the life will begin to die and cause bacteria to evolve to decompose the dead matter and this will further use the DO. Therefore it is important to monitor the amount of DO in the water and also the BOD so it will not deplete the oxygen levels to a low and cause the system to become unhealthy and unsupportable to sustain life. So, the correct answer is option B.

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Re-Attempt Weekly Quiz Competition

	List I		List II
A)	BOD	I)	Treatment of sewage
B)	KVIC	II)	Measure of organic matter in water
C)	LAB	III)	Biological methods for controlling plant diseases
D)	STPS	IV)	Increases vitamin $$B_{12}$$
		V)	Production of biogas

Environmental Issues Test - 77

Result

Environmental Issues Test - 77

Score

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Rank

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SHARING IS CARING

Question 1

Incineration

Autoclaving

Land filling

Both B and C

Solution

Question 2

Lead

Copper

Gold

All of the above

Solution

Question 3

Chernobyl

Japan

Delhi

Chennai

Solution

Question 4

A- IV, B- III, C- II, D- V

A- V, B- II, C- III, D- I

A- II, B- I, C- IV, D- V

A- II, B- V, C- IV, D- I

Solution

Question 5

True

False

Ambiguous

Data insufficient

Solution

Question 6

0.18 gm/km

0.1 gm/km

0.5 gm/km

1 gm/km

Solution

Question 7

I only

II only

III only

I and III only

I, II and III

Solution

Question 8

A-ii, IV B-iii, I C-i, II D-iv, III

A-ii, I B-i, III C-iv, II D-iii, IV

A-i, IV B-iii, II C-iv, I D-ii, III

A-ii, III B-ii, IV C-iii, I D-i, II

Solution

Question 9

$$ A=CO_2; B = CH_4; C = N_2O; D= CFCs$$

$$ A=CO_2; B = CFCs; C = CH_4; D=N_2O$$

$$ A=CFCs; B=CO_2; C = CH_4; D=N_2O$$

$$ A = CFCs; B = CH_4; C = CO_2; D=N_2O$$

Solution

Question 10

Are directly proportional

Are inversely proportional

Are not related

Always remain equal to each other

Solution

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