Science Technology questions from IAS 2020.
In rural road construction, the use of which of the following is preferred for ensuring environmental sustainability or to reduce carbon footprint? 1. Copper slag 2. Cold mix asphalt technology 3. Geotextiles 4. Hot mix asphalt technology 5. Portland cement Select the correct answer using the code given below:
In India, the term ‘Public Key Infrastructure’ is used in the context of
Steel slag can be the material for which of the following? 1. Construction of base road 2. Improvement of agricultural soil 3. Production of cement Select the correct answer using the code given below
With reference to visible light communication (VLC) technology, which of the following statements are correct? 1. VLC uses electromagnetic spectrum wavelengths 375 to 780nm 2. VLC is known as long-range optical wireless communication 3. VLC can transmit large amounts of data faster than Bluetooth 4. VLC has no electromagnetic interference Select the correct answer using the code given below
In India, why are some nuclear reactors kept under ‘IAEA Safeguards’ while others are not?
Consider the following statements: 1. Coal ash contains arsenic, lead and mercury. 2. Coal-fired power plants release sulphur dioxide and oxides of nitrogen into the environment. 3. High ash content is observed in Indian coal. Which of the statements given above is/are correct?
What is the importance of using Pneumococcal Conjugate Vaccines in India? 1. These vaccines are effective against pneumonia as well as meningitis and sepsis. 2. Dependence on antibiotics that are not effective against drug-resistant bacteria can be reduced. 3. These vaccines have no side effects and cause no allergic reactions. Select the correct answer using the code given below
With reference to ‘Blockchain Technology,’ consider the following statements: 1. It is a public ledger that everyone can inspect, but which no single user controls. 2. The structure and design of blockchain is such that all the data in it are about cryptocurrency only. 3. Applications that depend on basic features of blockchain can be developed without anybody's permission. Which of the statements given above is/are correct?
With reference to the carbon nanotubes, consider the following statement: 1. They can be used as the carriers of drugs and antigens in the human body. 2. They can be made. into artificial blood capillaries for an injured part of human body. 3. They can be used in biochemical sensors. 4. Carbon nanotubes are biodegradable. Which of the statements given above are correct?
With reference to the current trends in the cultivation of sugarcane in India, consider the following statements: 1. A substantial saving in seed material is when ‘bud chip setts’ are raised in a nursery and transplanted in the main field. 2. When direct planting of setts is done, the germination percentage is better with single-budded setts as compared to setts with many buds. 3. If bad weather conditions prevail when setts are directly planted, single-budded setts have better survival as compared to large setts. 4. Sugarcane can be cultivated using setts prepared from tissue culture. Which of the statements given above is/are correct?
Consider the following statements: 1. Genetic changes can be introduced in the cells that produce eggs or sperms of a prospective parent. 2. A person's genome can be edited before birth at the early embryonic stage. 3. Human induced pluripotent stem cells can be injected into the embryo of a pig. Which of the statements given above is/are correct?
With reference to solar water pumps, consider the following statements: 1. Solar power can be used for running surface pumps and not for submersible pumps, 2. Solar power can be used for running centrifugal pumps and not the ones with piston. Which of the statements given above is/are correct?