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Science & Technology

923 questions asked in UPSC Prelims.

1996 · Q125Science & TechnologySpace Technology & Astronomymoderate

Consider the following statements: A person in a spaceship located half-way between the earth and the sun will notice that the I. Sky is jet black. II. Stars do not twinkle. III. Temperature outside the spaceship is much higher than that on the surface of the earth. Of these statements

  1. (a)Only III is correct
  2. (b)I and II are correct
  3. (c)I and III are correct
  4. (d)I, II and III are correct
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Official answer(b) I and II are correct

1996 · Q130Science & TechnologyBiologyeasy

Match List I (Physiological processes) with List II (Cell organelles) and select the correct answer by using the codes given below the lists: List I I. Photosynthesis II. Mineral uptake III. Respiration IV. Protein Synthesis List II A) Plasma membrane B) Chloroplast C) Mitochondria D) Ribosomes Codes:

  1. (a)I-A, II-B, III-C, IV-D
  2. (b)I-A, II-B, III-D, IV-C
  3. (c)I-B, II-A, III-C, IV-D
  4. (d)I-B, II-A, III-D, IV-C
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Official answer(c) I-B, II-A, III-C, IV-D

1996 · Q131Science & TechnologyLogical Reasoning & Puzzlesmoderate

Examine the following statements: I. George attends Music classes on Monday. II. He attends Mathematics classes on Wednesday. III. His Literature classes are not on Friday. IV. He attends History classes on the day following the day of his Mathematics classes. V. On Tuesday, he attends his Sports classes. If he attends just one subject in a day and his Sunday is free, then he is also free on

  1. (a)Monday
  2. (b)Thursday
  3. (c)Saturday
  4. (d)Friday
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Official answer(d) Friday

1996 · Q132Science & TechnologyQuantitative Aptitudeeasy

Consider the following figures: (i) a rectangle 4 cm × 9 cm (ii) a square of side 6 cm (iii) a right-angled triangle with base 8 cm and height 9 cm Which one of the following conclusions can be drawn from these figures?

  1. (a)The areas of the three figures are all different
  2. (b)The areas of all the three figures are equal
  3. (c)The perimeters of the three figures are equal
  4. (d)The perimeters of figures I and II are equal
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Official answer(b) The areas of all the three figures are equal

1996 · Q137Science & TechnologyQuantitative Aptitudemoderate

The given pie charts show the proportion of literates and illiterates in a country, in the year 1970 and 1990 and also the proportion of males (M) and females (F) among the literates. Which one of the following statements can be said to be beyond any doubt?

  1. (a)In 1970 has of the illiterates were women (females)
  2. (b)The proportion of literate males to the total population of males remained the same over the years
  3. (c)Male literacy did not improve over this period
  4. (d)The ratio of female literates to male literates improved significantly over this period
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Official answer(d) The ratio of female literates to male literates improved significantly over this period

1996 · Q150Science & TechnologyLogical Reasoning & Puzzleseasy

A man starts walking in the north-easterly direction from a particular point. After walking a distance of 500 metres, he turns southward and walks a distance of 400 metres. At the end of this walk he is situated

  1. (a)300 metres north of the starting point
  2. (b)100 metres north-east of the starting point
  3. (c)300 metres east of the starting point
  4. (d)100 metres north of the starting point
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Official answer(c) 300 metres east of the starting point

1995 · Q1Science & TechnologySpace Technology & Astronomyeasy

A meteor is

  1. (a)a rapidly moving star
  2. (b)a piece of matter which has entered the earth’s atmosphere from outer space
  3. (c)part of a constellation
  4. (d)a comet without a tail
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Official answer(b) a piece of matter which has entered the earth’s atmosphere from outer space