1616: The surface of a lake is frozen in severe winter, but the water at its bottom is still liquid. What is the reason?
(a) Ice is a bad conductor of heat
(b) Since the surface of the lake is at the same temperature as the air, no heat is lost
(c) The density of water is maximum at 4 degree celcius
(d) None of the statements (a), (b) and (c) given above is correct.
1617: A complete cycle of a traffic light takes 60 seconds. During each cycle the light is green for 25 second, yellow for 5 second and red for 30 second. At a randomly chosen time, the probability that the light will not be green is
(a) 1/3
(b) 1/4
(c) 5/12
(d) 7/12
1618: Consider the following crops :
1. Cotton
2. Groundnut
3. Maize
4. Mustard
Which of the above are Kharif crops?
(a) 1 and 2
(b) 1, 2 and 3
(c) 3 and 4
(d) 1, 2, 3 and 4
1619: In which State of India is coconut grown extensively ?
(a) Karnataka
(b) Andhra Pradesh
(c) Kerala
(d) Assam
1620: By a regulation in 1793, the District Collector was deprived of his judicial powers and made the collecting agent only. What was the reason for such regulation?
(a) Lord Cornwallis felt that the District Collector's efficiency of revenue collection would enormously increase without the burden of other work
(b) Lord Cornwallis felt that Judicial power should compulsorily be in the hands of Europeans while Indians can be given the job of revenue collection in the districts
(c) Lord Cornwallis was alarmed at the extent of power concentrated in the District Collector and felt that such absolute power was undesirable in one person
(d) The judicial work demanded a deep knowledge of India and a good training in law and Lord Cornwallis felt that District Collector should be only a revenue collector