UPSC CSE 2018 PRELIMS GS Part - 7 Q41 to Q45 IAS EXAM an Administrative ServicesBY: AAKRIT
41. Consider the following statements: 1. The Reserve Bank of India manages and services Government of India Securities but not any State Government Securities. 2. Treasury bills are issued by the Government of India and there are no treasury bills issued by the State Governments. 3. lreasury bills offer are issued at a discount from the par value. Which of the statements given above is/are correct? (a) 1 and 2 only (b) 3 Only (c) 2 and 3 only (d) 1, 2 and 3
. Answer.C Explanation: There are two types of bills viz. Treasury Bills and commercial bills. Treasury Bills are issued by the Central Government; Commercial Bills are issued by financial institutions.Reserve Bank of India maintains the Principal Accounts of Central as well as State Governments at its Central Accounts Section,Nagpur. Treasury Bills are issued only by the central government in India. The State governments do not issue any treasury bills. Interest on the treasury bills is determined by market forces.T-Bills are issued on discount to face value, while the holder gets the par value on maturity.
42. Consider the following statements: 1. The Earth's magnetic field has reversed every few hundred thousand years. 2. When the Earth was created more than 4000 million years ago, there was 54% oxygen and no carbon dioxide. 3. When living organisms originated, they modified the early atmosphere of the Earth. Which of the statements given above is/are correct? (a) 1 only (b) 2 and 3 only (c) 1 and 3 only (d) 1, 2 and 3
Answer.c . Explanation: The Earth formed approximately 4.5 billion 5 3 years ago, along with the other seven planetsin the solar system. As the Earth cooled, a primitive atmosphere was created by the out-gassing of early volcanoes. The early atmosphere contained no oxygen and would have been toxic to human beings, as well as most other life on Earth today. . Based on an analysis of gases vented by modern volcanoes, it seems likely that this early atmosphere consisted mostly of water vapour (H20) and carbon dioxide (CO2) and nitrogen gas (N2) 0 9 2 In the whole process of evolution, the living organism changed the chemical compositionof the Atmosphere. For example, oxygen came from the photosynthesis. 3 5 2
43. The terms 'Wanna Cry, Petya and Eternal Blue sometimes mentioned in the news recently are related to (a) Exo-planets (b) Crypto-currency (c) Cyber attacks (d) Mini satellites
. Answer.c Explanation: The Petya and WannaCry cyber-attacks in May and June 2017; are two of the biggest in history and impacted the finances of companies throughout the globe. . Wanna Cry, which affected numerous organisations, including the NHS, spread to 150 countries and is estimated to have cost the global economy 6bn.
44. With reference to the circumstances in Indian agriculture, the concept of" Conservation Agriculture" assumes significance. Which of the following fall under the Conservation Agriculture? 1. Avoiding the monoculture practices 2. Adopting minimum tillage 3. Avoiding the cultivation of plantation crops 4. Using crop residues to cover soil surface 5. Adopting spatial and temporal crop sequencing/crop rotations Select the correct answer using the code given below: (a) 1, 3 and 4 (b) 2, 3, 4 and 5 (c) 2, 4 and 5 (d) 1, 2, 3 and 5
. Answer.d Explanation:Conservation agriculture (CA) technologies involve minimum soil disturbance, permanent soil cover through crop residues or cover crops, and crop rotations for achieving higher productivity. Main features of Conservation agriculture (CA) are; Least interference with natural processes, No-till or drastically reduced tillage (biological tillage, Low wind and soil erosion, Surface retention of residues (permanently covered),Infiltration rate of water is high, Use of in-situ organics/composts, Brown manuring/cover crops (surface retention),Diversified and more efficient rotations etc.
The principal indicators of non-sustainability of agricultural systems includes: soil erosion,soil organic matter decline, salinization. These are caused mainly by : (i) intensive tillage induced soil organic matter decline, soil structural degradation, water and wind erosion, reduced water infiltration rates, surface sealing and crusting, soil compaction, (ii) insufficient return of organic material, and (ii) monocropping.
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