1251: The Function of heavy water in a nuclear reactor is to
(a) Stop the nuclear reaction
(b) Slow down the speed of neutrons
(c) Cool down the reactor
(d) Increase the speed of neutrons
1252: A walks around a circular field at the rate of one round per hour while B runs around it at the rate of six rounds per hour. They start in the same direction from the same point at 7.30 a.m. They shall first cross each other at
(a) 8.30 a.m.
(b) 8.10 a.m.
(c) 7.48 a.m.
(d) 7.42 a.m.
1253: Projects and Development India Limited is Mainly engaged is design engineering, procurement and supervision of construction/commissioning in which area?
(a) Pharmaceutical plants
(b) Petroleum refineries and sugar factories
(c) Ship-building yards
(d) Fertilliser and allied chemical plants
1254: Which one of the following pairs is not correctly matched ?
(a) Cosmic Background Explorer (COBE) : Satellite programme
(b) Falcon : Under-sea cable system
(c) Discovery : Space shuttle
(d) Atlantis : Space station
1255: Match List I with List II and select the correct answer using the codes given below the Lists :
List I-------------List II
(Timber) --------- (Country)
I. Cedar ---------- (A) Myanmar
II. Douglas Fir ----- (B) Canada
III. Mahogany ----- (C) Mexico
IV. Teak ---------- (D) Honduras
Codes:
(a) I-C, II-B, III-A, IV-D
(b) I-C, II-B, III-D, IV-A
(c) I-B, II-C, III-D, IV-A
(d) I-B, II-C, III-A, IV-D