Science & Technology

923 questions asked in UPSC Prelims.

2007 · Q124 Science & TechnologyBiologymoderate

Which on the following is the correct sequence in order of decreasing length of the three structural parts given below of small intestine in the human body?

(a)Jejunum – Duodenum – Ileum
(b)Ileum – Duodenum – Jejunum
(c)Jejunum – Ileum – Duodenum
(d)Ileum – Jejunum – Duodenum

Show answerHide answer

Official answer(d) Ileum – Jejunum – Duodenum

2007 · Q125 Science & TechnologyDefence Technologymoderate

Consider the following statements: 1. In November 2006, DRDO successfully conducted the interception test using Prithvi-II missile. 2. Prithvi-II is a surface-to-surface missile and can be deployed to guard the metros against air attack. Which of the statements given above is/are correct?

(a)1 only
(b)2 only
(c)Both 1 and 2
(d)Neither 1 nor 2

Show answerHide answer

Official answer(c) Both 1 and 2

2007 · Q126 Science & TechnologySpace Technology & Astronomyeasy

NASA’s Deep Impact space mission was employed to take detailed pictures of which comet nucleus?

(a)Halley’s comet
(b)Hale-Bopp
(c)Hyakutake
(d)Temple 1

Show answerHide answer

Official answer(d) Temple 1

2007 · Q128 Science & TechnologyScience & Technology Historymoderate

Match List-I with List-II and select the correct answer using the code given below the lists: List-I (Person) A. John C. Mather B. Michael Griffin C. Paul G. Allen D. Piers Sellers List-II (Known as) 1. Co-founder of Microsoft 2. Space walker 3. Administrator of NASA 4. Nobel Prize winner, 2006 in Physics Codes:

(a)A-4 B-1 C-3 D-2
(b)A-2 B-3 C-1 D-4
(c)A-4 B-3 C-1 D-2
(d)A-2 B-1 C-3 D-4

Show answerHide answer

Official answer(c) A-4 B-3 C-1 D-2

2007 · Q129 Science & TechnologySpace Technology & Astronomyeasy

Which one of the following pairs is not correctly matched?

(a)Cosmic Background : Satellite Programme Explorer (COBE)
(b)Falcon : Under-sea cable system
(c)Discovery : Space shuttle
(d)Atlantis : Space station

Show answerHide answer

Official answer(d) Atlantis : Space station

2007 · Q130 Science & TechnologyComputer & Information Technologymoderate

Match List-I with List-II and select the correct answer using the code given below the lists: List-I (Company) A. Chevron B. AT&T C. AMD D. Enercon GmbH List-II (Major Area/Product) 1. Wind Energy 2. Oil 3. Telephone, Internet 4. Micro-processor Codes:

(a)A-2 B-1 C-4 D-3
(b)A-4 B-3 C-2 D-1
(c)A-2 B-3 C-4 D-1
(d)A-4 B-1 C-2 D-3

Show answerHide answer

Official answer(c) A-2 B-3 C-4 D-1

2007 · Q131 Science & TechnologyScience & Technology Historyeasy

Which one of the following pairs is not correctly matched?

(a)Williams Dickson : Motion Picture Film
(b)Charles Babbage : Programmable Computer
(c)Nicholas Stern : Construction Technology
(d)Brian Greene : String Theory

Show answerHide answer

Official answer(c) Nicholas Stern : Construction Technology

2007 · Q132 Science & TechnologySpace Technology & Astronomyeasy

What is the Galileo project which has been in news recently?

(a)An inter-country programme of missile shield developed by the United States of America
(b)A project developed by India with assistance from Canada
(c)An environmental protection project being developed by Japan
(d)A multi-satellite navigation project being developed by the European Union

Show answerHide answer

Official answer(d) A multi-satellite navigation project being developed by the European Union

2007 · Q133 Science & TechnologyQuantitative Aptitudemoderate

(Each small circle represents a different station) Refer to the figure showing a network between station A and station B. What is the maximum number of different paths that exist between station A and station B?

(a)28
(b)31
(c)33
(d)35

Show answerHide answer

Official answer(b) 31

2007 · Q134 Science & TechnologyQuantitative Aptitudemoderate

In how many maximum different ways can 3 identical balls be placed in 12 squares (each ball is placed in the exact centre of a square) shown in the figure above such that they do not lie along the same straight line? The original figure is not available for this question.

(a)144
(b)200
(c)204
(d)216

Show answerHide answer

Official answer(b) 200

2007 · Q135 Science & TechnologyQuantitative Aptitudeeasy

In the figure shown above, what is the maximum number of different ways in which 8 identical balls can be placed in small triangles 1, 2, 3 and 4 such that each triangle contains at least one ball?

(a)32
(b)35
(c)44
(d)56

Show answerHide answer

Official answer(b) 35

2007 · Q136 Science & TechnologyQuantitative Aptitudemoderate

Amit has five friends: 3 girls and 2 boys. Amit’s wife also has five friends: 3 boys and 2 girls. In how many maximum different ways can they invite 2 boys and 2 girls such that two of them are Amit’s friends and two are his wife’s friends?

(a)24
(b)38
(c)46
(d)48

Show answerHide answer

Official answer(c) 46

2007 · Q137 Science & TechnologyQuantitative Aptitudemoderate

Five balls of different colours are to be placed in three different boxes such that any box contains at least one ball. What is the maximum number of different ways in which this can be done?

(a)90
(b)120
(c)150
(d)180

Show answerHide answer

Official answer(c) 150

2007 · Q138 Science & TechnologyQuantitative Aptitudemoderate

All six letters of the name SACHIN are arranged to form different words without repeating any letter in any one word. The words so formed are then arranged as a dictionary. What will be the position of the word SACHIN in that sequence?

(a)436
(b)590
(c)601
(d)751

Show answerHide answer

Official answer(c) 601

2007 · Q139 Science & TechnologyQuantitative Aptitudeeasy

Three dice (each having six faces with each face showing one number from 1 to 6) are rolled. What is the number of possible outcomes such that at least one die shows the number 2?

(a)36
(b)81
(c)91
(d)116

Show answerHide answer

Official answer(c) 91

2007 · Q140 Science & TechnologyQuantitative Aptitudeeasy

Groups, each containing 3 boys, are to be formed out of 5 boys – A, B, C, D and E – such that no one group contains both C and D together. What is the maximum number of different groups?

(a)5
(b)6
(c)7
(d)8

Show answerHide answer

Official answer(c) 7

2007 · Q141 Science & TechnologyLogical Reasoning & Puzzlesmoderate

Six faces of a cube are numbered from 1 to 6, each face carrying one different number. Further, 1. The face 2 is opposite to the face 6. 2. The face 1 is opposite to the face 5. 3. The face 3 is between the face 1 and face 5. 4. The face 4 is adjacent to the face 2. Which one of the following is correct?

(a)The face 2 is adjacent to the face 3
(b)The face 6 is between the face 2 and the face 4
(c)The face 1 is between the face 5 and the face 6
(d)None of the above

Show answerHide answer

Official answer(a) The face 2 is adjacent to the face 3

2007 · Q142 Science & TechnologyQuantitative Aptitudemoderate

Each of the 3 persons is to be given some identical items such that the product of the numbers of items received by each of the three persons is equal to 30. In how many maximum different ways can this distribution be done?

(a)21
(b)24
(c)27
(d)33

Show answerHide answer

Official answer(c) 27

2007 · Q143 Science & TechnologyQuantitative Aptitudeeasy

Six equidistant vertical lines are drawn on a board. Six equidistant horizontal lines are also drawn on the board cutting the six vertical lines and the distance between any two consecutive horizontal lines is equal to that between any two consecutive vertical lines. What is the maximum number of squares thus formed?

(a)37
(b)55
(c)126
(d)225

Show answerHide answer

Official answer(b) 55

2007 · Q144 Science & TechnologyQuantitative Aptitudeeasy

A person has to completely put each of three liquids – 403 litres of petrol, 465 litres of diesel and 496 litres of mobile oil – in bottles of equal size without mixing any of the three types of liquids such that each bottle is completely filled. What is the least possible number of bottles required?

(a)34
(b)44
(c)46
(d)None of the above

Show answerHide answer

Official answer(b) 44

2007 · Q145 Science & TechnologyQuantitative Aptitudemoderate

A and B can complete work together in 5 days. If A works at twice his speed and B at half of his speed, this work can be finished in 4 days. How many days would it take for A alone to complete the job?

(a)10
(b)12
(c)15
(d)18

Show answerHide answer

Official answer(a) 10

2007 · Q146 Science & TechnologyQuantitative Aptitudemoderate

If all the numbers from 501 to 700 are written, what is the total number of times the digit 6 appears?

(a)138
(b)139
(c)140
(d)141

Show answerHide answer

Official answer(c) 140

2007 · Q147 Science & TechnologyQuantitative Aptitudemoderate

Amit starts from a point A, walks to another point B and then returns from B to A by his car, taking a total time of 6 hours 45 minutes. If he had driven both ways in his car, he would have taken 2 hours less. How long would it take for him to walk both ways?

(a)7 hours 45 minutes
(b)8 hours 45 minutes
(c)8 hours 30 minutes
(d)8 hours 45 minutes

Show answerHide answer

Official answer(d) 8 hours 45 minutes

2007 · Q148 Science & TechnologyQuantitative Aptitude

A train completes a journey with a few stoppages in between at an average speed of 40 km per hour. If the train had not stopped anywhere, it would have completed the journey at an average speed of 60 km per hour. On an average, how many minutes per hour does the train stop during the journey?

(a)20 minutes per hour
(b)18 minutes per hour
(c)15 minutes per hour
(d)10 minutes per hour

Show answerHide answer

Official answer(a) 20 minutes per hour

2007 · Q149 Science & TechnologyQuantitative Aptitude

The average salary of 100 employees in an office is Rs 16,000 per month. The management decided to raise salary of every employee by 5% but stopped a transport allowance of Rs 800 per month which was paid earlier to every employee. What will be the new average monthly salary?

(a)Rs 16,000
(b)Rs 16,500
(c)Rs 16,800
(d)Cannot be known since data are insufficient

Show answerHide answer

Official answer(a) Rs 16,000