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Science & Technology

923 questions asked in UPSC Prelims.

2005 · Q90Science & TechnologyScience & Technology Institutionsmoderate

Consider the following statements : 1. Vigyan Rail is a Science Exhibition on wheels organized by the Council of Scientific and Industrial Research. 2. Vigyan Prasar is an autonomous body under the Ministry of Human Resource Development. 3. EDUSAT, the ISRO’s educational satellite was launched from French Guyana in 2004. Which of the statements given above is/are correct?

  1. (a)1, 2 and 3
  2. (b)1 and 2
  3. (c)2 and 3
  4. (d)None
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Official answer(d) None

2005 · Q98Science & TechnologyQuantitative Aptitudemoderate

Aryan runs at a speed of 40 metre/minute. Rahul follows him after an interval of 5 minutes and runs at a speed of 50 metre/minute. Rahul’s dog runs at a speed of 60 metre/minute and starts along with Rahul. The dog reaches Aryan and then comes back to Rahul, and continues to do so till Rahul reaches Aryan. What is the total distance covered by the dog?

  1. (a)600 metres
  2. (b)750 metres
  3. (c)980 metres
  4. (d)1200 metres
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Official answer(d) 1200 metres

2005 · Q99Science & TechnologyQuantitative Aptitudedifficult

A big rectangular plot of area 4320 m² is divided into 3 square-shaped smaller plots by fencing parallel to the smaller side of the plot. However some area of land was still left as a square could not be formed. So, 3 more square-shaped plots were formed by fencing parallel to longer side of the original plot such that no area of the plot was left surplus. What are the dimensions of the original plot?

  1. (a)160 m × 27 m
  2. (b)240 m × 18 m
  3. (c)120 m × 36 m
  4. (d)135 m × 32 m
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Official answer(c) 120 m × 36 m

2005 · Q121Science & TechnologyQuantitative Aptitudedifficult

There are 10 identical coins and each one of them has ‘H’ engraved on one face and ‘T’ engraved on the other face. These 10 coins are lying on a table and each one of them has the ‘H’ face as the upper face. In one attempt, exactly four (neither more nor less) coins can be turned upside down. What is the minimum number of attempts in which the ‘T’ faces of all the 10 coins can be brought to be the upper faces?

  1. (a)4
  2. (b)7
  3. (c)8
  4. (d)Not possible
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Official answer(a) 4

2004 · Q10Science & TechnologyHealth & Diseasesmoderate

Consider the following statements: 1. Non-function of lachrymal gland is an important symptom of deficiency of Vitamin A. 2. Deficiency of Vitamin B1 can lead to indigestion and heart enlargement. 3. Vitamin C deficiency can lead to pain in the muscles. 4. Deficiency of Vitamin D causes increased loss of Ca++ in urine. Which of these statements given above are correct?

  1. (a)1 and 2
  2. (b)2, 3 and 4
  3. (c)1, 3 and 4
  4. (d)1, 2, 3 and 4
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Official answer(a) 1 and 2