Recently, “oilzapper’’ was in the news. What is it?
Prelims
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Science and Technology › Renewable Energy Technology
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Science and Technology › Renewable Energy Technology
Microbial fuel cells are considered a source of sustainable energy. Why? 1. They use living organisms as catalysts to generate electricity from certain substrates.
2. They use a variety of inorganic materials as substrates.
3. They can be installed in wastewater treatment plants to cleanse water and produce electricity.Options
Answer
(C)
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Science and Technology › Space ProgramsXIND
Science and Technology › Space ProgramsXIND
Satellites used for telecommunication relay are kept in a geostationary orbit. A satellite is said to be in such an orbit when:
1. The orbit is geosynchronous.
2. The orbit is circular.
3. The orbit lies in the plane of the earth’s equator.
4. The orbit is at an altitude of 22,236 km.Options
Answer
(A)
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Science and Technology › SpaceXTheory
Science and Technology › SpaceXTheory
What is the difference between asteroids and comets?
1. Asteroids are small rocky planetoids, while comets are formed of frozen gases held together by rocky and metallic material.
2. Asteroids are found mostly between the orbits of Jupiter and Mars, while comets are found mostly between Venus and mercury.
3. Comets show a perceptible glowing tail, while asteroids do not.
Which of the statements given above is/are correct?Options
Answer
(B)
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Science and Technology › Specific Diseases
Science and Technology › Specific Diseases
A company marketing food product advertises that its items do not contain trans-fats. What does this campaign signify to the customers? 1. The food products are not made out of hydrogenated oils.
2. The food products are not made out of animal fats/oils.
3. The oils used are not likely to damage the cardiovascular health of the consumers.Options
Answer
(C)
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