Science & Technology UPSC PYQ 2007

Which one of the following is called Philosopher’s wool?

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?

Which one of the following is another name of RDX?

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?

Robert Webster is known for his work associated with which one of the following?

Consider the following statements: 1. The series of international paper sizes is based on A0 size whose area is 0.5 m² (approx). 2. The area of A4 size paper is 1⁄8th of the A0 size paper. Which of the statements given above is/are correct?

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?

Which of the following light types of light are strongly absorbed by plants:

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 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?

How do most insects respire?

In human beings, normally in which one of the following parts does the sperm fertilize the ovum?

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?

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?

Which one of the following non-metals is NOT a poor conductor of electricity?

Consider the following statements: 1. A flute of smaller length gives waves of lower frequency. 2. Sound travels in rocks in the form of longitudinal elastic waves only. Which of the statements given above is/are correct?

Consider the following statements : 1. If magenta and yellow coloured circles intersect, the intersected area will have red colour. 2. If cyan and magenta coloured circles intersect, the intersected area will have blue colour. Which of the statements given above is/are correct?

Three identical vessels A, B and C are filled with water, mercury and kerosene respectively up to an equal height. The three vessels are provided with identical taps at the bottom of the vessels. If the three taps are opened simultaneously, then which vessel is emptied first?

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

Who among the following is considered as the inventor of the World Wide Web (WWW)?

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?

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

What is the broad area in which the Nobel Prize winners for the year 2006 in Physiology or Medicine worked to get the prize?

Consider the following statements: 1. In the year 2006, India successfully tested a full-fledged cryogenic stage in rocketry. 2. After USA, Russia and China, India is the only country to have acquired the capability for use of cryogenic stage in rocketry. Which of the statements given above is/are correct?

Which one of the following parts of the human brain is the regulating centre for swallowing and vomiting?

Which of the following is not a digestive enzyme in the human system?

Which one of the following types of glass can cut off ultraviolet rays?

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?

Assertion (A): A jet aircraft moving at Mach number equal to 1 travels faster at an altitude of 15 km than while moving at Mach number equal to 1 near sea level. Reason (R): The velocity of sound depends on the temperature of the surrounding medium.

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?

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?

Production of which one of the following is a function of the liver?

Recently, the European Union and six other countries including India signed the International Thermonuclear Experimental Reactor (ITER) Project. Which one of the following was NOT a signatory to it?

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?

Which one of the following does not contain silver?

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?

Which of the following types is used by computed tomography employed for visualization of the internal structure of human body?

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?

In the human body, to which structure is the appendix attached?

Four wires of the same material and of the dimensions given below are stretched by equal loads separately. Which one of them will be elongated the maximum?

In the human body which one of the following hormones regulates blood calcium and phosphate?

Which one of the following parts of the pitcher plant becomes modified into a pitcher?

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

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:

(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?

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?

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?