66: Who of the following scientists proved that the stars with mass less than 1.44 times the mass of the Sun end up as White Dwarfs when they die?
(a) Edwin Hubble
(b) S. Chandrashekhar
(c) Steven Weinberg
(d) Stephen Hawking
67: With reference to Union Budget, which of the following is/are covered under Non-Plan Expenditure?
1. Defence expenditure
2. Interest payments
3. Salaries and pensions
4. Subsidies
Select the correct answer using the code given below.
(a) 1 only
(b) 2 and 3 only
(c) 1, 2, 3 and 4
(d) None
68: When it is 8 A.M. on Wednesday of Greenwich:
(a) It is 10.30 P.M. on Wednesday at London
(b) It is 6.15 A.M. on Tuesday at New York
(c) It is 3.00 P.M. on Wednesday at Hong Kong
(d) It is 5.00 P.M. on Wednesday at Tokyo
69: The surface area of a cube is 216 sq.m. What is its volume ?
(a) 100 cu m
(b) 216 cu m
(c) 480 cu m
(d) 512 cu m
70: Consider the following statements :
In a nuclear reactor, self-sustained chain reaction is possible, because
I. more neutrons are released in each of the fission reactions.
II. the neutrons immediately take part in the fission process.
III. the fast neutrons are slowed down by Graphite.
IV. every neutron realeased in the fission reaction initiates further fission.
Which of these statements are correct ?
(a) I, II and III
(b) I and III
(c) II and IV
(d) II, III and IV