Solved : UPSC Engineering Services Examination, 2015 GS Paper – Part 1

This is part 1 of the solutions to the UPSC Engineering Services Examination 2015 which was held on 12 June 2015. The Engineering Services Examination conducted by UPSC has 60 questions from General Studies (Part B – 61 to 120 of the General Ability Paper). The answer and explanation to these questions (first 30) are provided here. Some questions are of the Civil Services Examination level, while others are a bit easier. Nevertheless, these would serve good practice and revision for UPSC CSE Prelims. 61.… Continue Reading »


Primary air pollutants and their sources

What are primary air pollutants (PAPs)? Primary air pollutants (PAPs) are those that are emitted directly into the air from sources. Examples – Sulphur dioxide, nitrogen oxides, carbon monoxide, volatile organic matter, particulate matters, lead, ammonia etc. How PAPs impact environment? They can have effects both directly and as precursors of secondary air pollutants (chemicals formed through reactions in the atmosphere), which are discussed in the following section. What are secondary air pollutants? A secondary pollutant is not directly emitted as such, but forms when… Continue Reading »


Ocean Acidification and its effect on marine ecosystem

What is ocean acidification? Since the beginning of the industrial revolution, the release of carbon dioxide (CO2) from humankind’s industrial and agricultural activities has increased the amount of CO2 in the atmosphere. The oceans currently absorb about a third of human-created CO2 emissions, roughly 22 million tons a day.When carbon dioxide dissolves in this ocean, carbonic acid is formed. CO2 reacts with water molecules (H2O) and forms the weak acid H2CO3 (carbonic acid). Most of this acid dissociates into hydrogen ions (H+) and bicarbonate ions… Continue Reading »


Prelims MCQs Quiz 39 : Government Schemes

1. The Kudumbashree program by the Kerala government works in the area of 1. reducing maternal mortality 2. providing micro credit 3. enhancing entrepreneurship 4. providing housing Select the correct answer using the codes given below. a) 1 and 2 only b) 1 ,3 and 4 only c) 2 and 3 only d) 1 ,2, and 4 only 2. The Price stabilization fund will support the procurement of 1. onion 2. groundnut 3. potato 4. rice Select the correct answer using the codes given below. a)… Continue Reading »


Bioindicators – mechanism, uses, advantages and examples

What are bioindicators? A bioindicator is a living organism that gives us an idea of the health of an ecosystem. Some organisms are very sensitive to pollution in their environment, so if pollutants are present, the organism may change its morphology, physiology or behaviour, or it could even die.   What can be a bioindicator? Bioindicators can be plants, animals or microorganisms.   How various bioindicators tell about the environmental health? 1. If toxins are present, certain plants may not be able to grow in… Continue Reading »


Prelims MCQs Quiz 38 : Economy

1. The term ‘micro-finance’ frequently appears in newspapers. Micro-finance includes 1. small loans 2. small deposits 3. money transfer 4. payment services Select the correct answer using the codes given below. a) 1, 2 and 3 only b) 1 ,3 and 4 only c) 2 ,3 and 4 only d) 1 ,2, 3 and 4  2. Consider the following statements about International Finance Corporation: 1. It is known as the private arm of the world bank. 2. It lends money to private sector companies of all… Continue Reading »


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