UPSC EPFO SOLVED PAPER 2012

Total Questions: 100

1. If 20% of P = 30% of Q = 1/6 of R, then P : Q : R is

Correct Answer: (d) 15 : 10 : 18
Solution:

2. A tree increases annually by 1/8th of its height. What will be its height after 2 years, if it stands today 64 cm high?

Correct Answer: (c) 81 cm
Solution:

3. Answer the following question

Correct Answer: (d) 2280 m²
Solution:

4. Three sets of data on comparable situations are available as under :

Correct Answer: (c) 8.08
Solution:

5. A train travels at a certain average speed for a distance of 63 km. Thereafter it travels a distance of 72 km with an average speed of 6 km/h more than the original speed. Total time taken to complete the journey is 3 hours. What is the original average speed of the train?

Correct Answer: (b) 42 km/h
Solution:

6. An iron rod of 1 cm diameter and 8 cm length is drawn into a wire of 18 m length with uniform thickness. The thickness of the wire would be

Correct Answer: (c) 1/15 cm
Solution:

7. A 60 m long train travels at a uniform speed of 72 km/h. Its passes non-stop along the 600 m platform of a wayside station. What is the elapsed time for the train to entirely clear the platform?

Correct Answer: (d) 33 s
Solution:

8. Train A is 75 m long and travels at a uniform speed of 54 km/h. Train B is 125 m long and travels at a uniform speed of 36 km/h in the direction opposite to that of Train A. If these trains are crossing at a double-track stretch, what is the time taken for the two trains to fully clear each other?

Correct Answer: (b) 8 s
Solution:

9. Biome, largest recognizable assemblage of animals and plants on the Earth, is controlled mainly by :

Correct Answer: (c) Climate
Solution:

Biome, largest recognisable assemblage of animals and plants on the Earth, is controlled mainly by climate. The complex bio-community formed by the adjustment of climate, soil etc, of a particular region is called Biome. Forest biome, Savanna biome, Grassland biome, Desert biome and Tundra biome are five terrestrial biomes of the world.

10. Despite having huge coal reserve in our country, why do we import millions of tons of coal?

1. It is policy of Government of India to save its own coal reserve for future use and import now from other countries for present use.
2. Most of the thermal plants in our country are coal based and they are unable to get sufficient coal supply from our coal mines.
3. Steel plants require large quantities of coking coal which we do not have, coking coal is to be imported from other countries.

Correct Answer: (b) 2 and 3
Solution:

Steel plants operating in India require large quantities of cooking coal, which we import from other countries because the cooking coal available in India is of inferior quality. Secondly most of the electricity generation power plants in India are thermal power plants which require coal and they are unable to get sufficient coal supply from our coal-mines.