696: Satellites used for telecommunication relay are kept in a geostationary orbit. A satellite is said to be in such an orbit when:
1. The orbit is geosynchronous.
2. The orbit is circular.
3. The orbit lies in the plane of the Earth's equator.
4. The orbit is at an altitude of 22,236 km.
Select the correct answer using the codes given below:
(a) 1, 2 and 3 only
(b) 1, 3 and 4 only
(c) 2 and 4 Only
(d) 1, 2, 3 and 4
697: The process by which metal surface is coated with thin layer of zinc is called:
(a) Vulcanising
(b) Galvanising
(c) Electroplating
(d) None of these
698: The first Indian ruler who joined the Subsidiary Alliance was
(a) the Nawab of Oudh
(b) the Nizam of Hyderabad
(c) Peshwa Baji Rao II
(d) the King of Travancore
699: Who was the leader of the Ghadar Party?
(a) Bhagat Singh
(b) Lala Hardayal
(c) Bal Gangadhar Tilak
(d) V. D. Savarkar
700: In medieval India, Mansabdari system was introduced mainly for
(a) making recruitment to the army
(b) facilitating revenue collection
(c) ensuring religious harmony
(d) effecting clean administration