Insights Static Quiz -53, 2018
Environment
INSIGHTS IAS QUIZ ON STATIC SYLLABUS - 2018
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Question 1 of 5
1. Question
Carbon dioxide is naturally fixed by converting it into
- Glucose
- Carbonates
Select the right code
Correct
Answer – c
The percentage of carbon dioxide in our atmosphere is a mere fraction of a percent because carbon dioxide is ‘fixed’ in two ways: (i) Green plants convert carbon dioxide into glucose in the presence of Sunlight and (ii) many marine animals use carbonates dissolved in sea-water to make their shells.
Incorrect
Answer – c
The percentage of carbon dioxide in our atmosphere is a mere fraction of a percent because carbon dioxide is ‘fixed’ in two ways: (i) Green plants convert carbon dioxide into glucose in the presence of Sunlight and (ii) many marine animals use carbonates dissolved in sea-water to make their shells.
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Question 2 of 5
2. Question
Consider the following statements about bio gas
- It majorly contains methane.
- The biogas plant works on the aerobic process to form biogas.
Select from the codes below
Correct
Answer – a
- Bio-gas is an excellent fuel as it contains up to 75% methane. It burns without smoke, leaves no residue like ash in wood, charcoal and coal burning. Its heating capacity is high
- The plant has a dome-like structure built with bricks. A slurry of cow-dung and water is made in the mixing tank from where it is fed into the digester. The digester is a sealed chamber in which there is no oxygen. Anaerobic micro-organisms that do not
require oxygen decompose or break down complex compounds of the cow-dung slurry. It takes a few days for the decomposition process to be complete and generate gases like methane, carbon dioxide, hydrogen and hydrogen sulphide. The bio-gas is stored in the gas tank above the digester from which they are drawn through pipes for use.
Incorrect
Answer – a
- Bio-gas is an excellent fuel as it contains up to 75% methane. It burns without smoke, leaves no residue like ash in wood, charcoal and coal burning. Its heating capacity is high
- The plant has a dome-like structure built with bricks. A slurry of cow-dung and water is made in the mixing tank from where it is fed into the digester. The digester is a sealed chamber in which there is no oxygen. Anaerobic micro-organisms that do not
require oxygen decompose or break down complex compounds of the cow-dung slurry. It takes a few days for the decomposition process to be complete and generate gases like methane, carbon dioxide, hydrogen and hydrogen sulphide. The bio-gas is stored in the gas tank above the digester from which they are drawn through pipes for use.
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Question 3 of 5
3. Question
Consider the following about the wind energy
- The largest working wind farm of India is near Kanyakumari.
- For optimum generation of wind energy, the wind speed should be higher than 50km/h.
- A wind plant also utilises storage cells for the backup when there is no wind.
Which of the above are correct
Correct
Answer – c
- The largest wind energy farm has been established near Kanyakumari in Tamil Nadu and it generates 380 MW of electricity.
- The wind speed should also be higher than 15 km/h to maintain the required speed of the turbine.
- Furthermore, there should be some back-up facilities (like storage cells) to take care of the energy needs during a period when there is no wind.
Incorrect
Answer – c
- The largest wind energy farm has been established near Kanyakumari in Tamil Nadu and it generates 380 MW of electricity.
- The wind speed should also be higher than 15 km/h to maintain the required speed of the turbine.
- Furthermore, there should be some back-up facilities (like storage cells) to take care of the energy needs during a period when there is no wind.
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Question 4 of 5
4. Question
Consider the following
- Plants as producers utilise only 10% of the available solar energy for photosynthesis.
- Primary consumers consume only 10% of the energy from the producers in their own body, and most energy gets lost during digestion.
- Human beings in their body have the largest accumulation of pesticides and other chemicals used on producers than any other organism in the food web.
Select the right code from below
Correct
Answer – c
- The green plants in a terrestrial ecosystem capture about 1% of the energy of sunlight that falls on their leaves and convert it into food energy.
- When green plants are eaten by primary consumers, a great deal of energy is lost as heat to the environment, some amount goes into digestion and in doing work and the rest goes towards growth and reproduction. An average of 10% of the food eaten is turned into its own body and made available for the next level of consumers.
- As the chemicals are not degradable, these get accumulated progressively at each trophic level. As human beings occupy the top level in any food chain, the maximum concentration of these chemicals get accumulated in our bodies. This phenomenon is known as biological magnification.
Incorrect
Answer – c
- The green plants in a terrestrial ecosystem capture about 1% of the energy of sunlight that falls on their leaves and convert it into food energy.
- When green plants are eaten by primary consumers, a great deal of energy is lost as heat to the environment, some amount goes into digestion and in doing work and the rest goes towards growth and reproduction. An average of 10% of the food eaten is turned into its own body and made available for the next level of consumers.
- As the chemicals are not degradable, these get accumulated progressively at each trophic level. As human beings occupy the top level in any food chain, the maximum concentration of these chemicals get accumulated in our bodies. This phenomenon is known as biological magnification.
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Question 5 of 5
5. Question
Disposable clay cups introduced in Indian Railways has been discontinued now for quite sometime. Why have they been discontinued?
Correct
Answer – a
The introduction of disposable cups was hailed as a step forward for reasons of hygiene. No one at that time perhaps thought about the impact caused by the disposal of millions of these cups on a daily basis. Some time back, kulhads, that is, disposable cups made of clay, were suggested as an alternative. But a little thought showed that making these kulhads on
a large scale would result in the loss of the fertile top-soil. Now disposable paper-cups are being used.Incorrect
Answer – a
The introduction of disposable cups was hailed as a step forward for reasons of hygiene. No one at that time perhaps thought about the impact caused by the disposal of millions of these cups on a daily basis. Some time back, kulhads, that is, disposable cups made of clay, were suggested as an alternative. But a little thought showed that making these kulhads on
a large scale would result in the loss of the fertile top-soil. Now disposable paper-cups are being used.
