3641: Contour bunding is used:
(a) To stop the winds in sandy deserts
(b) To irrigate desert areas
(c) To prevent erosion in hilly areas
(d) None of the above
3642: A man is waiting for a bus on routes 10, 17 and 25. The bus on route 10 comes every 10 min, bus on route 17 comes every 20 min, and bus on route 25 comes every 40 min. After the man reaches the stop, a bus just leaves the stop. What is the minimum time for which he has to wait to get a bus?
(a) 2 min
(b) 4 min
(c) 6 min
(d) 10 min
3643: Consider the following phenomena :
1. Light is affected by gravity.
2. The Universe is constantly expanding.
3. Matter warps its surrounding space-time.
Which of the above is/are the prediction/predictions of Albert Einstein's General Theory of Relativity, often discussed in media ?
(a) 1 and 2 only
(b) 3 only
(c) 1 and 3 only
(d) 1, 2 and 3
3644: Why the Indian farmers plough their fields during the time interval between two crops?
(a) In order to keep the soil loose for further cultivation
(b) To increase the porosity of the soil
(c) To escape drought
(d) To prevent clodding
3645: Which of the following pairs is not correctly matched?
(a) Reinhold Messner : Computer Technology
(b) Harlow Shapley : Astronomy
(c) Gregor Mendel : Hereditary Theory
(d) Godfrey Hounsfield : CT Scan