641: Mach Number is a term associated with the speed of:
(a) Ships
(b) Cars
(c) Aeroplanes
(d) Light
642: Who among the following were official Congress negotiators with Cripps Mission ?
(a) Mahatma Gandhi and Sardar Patel
(b) Acharya J. B. Kripalani and C. Rajagopalachari
(c) Pandit Nehru and Maulana Azad
(d) Dr. Rajendra Prasad and Rafi Ahmed Kidwai
643: Which one of the following statements is not correct?
(a) Gulfs with narrow fronts and wider rears experience high tides.
(b) Tidal currents take place when a gulf is connected with the open sea by a narrow channel.
(c) Tidal bore occurs when a tide enters the narrow and shallow estuary of a river.
(d) The tidal nature of the mouth of the river Hooghly is of crucial importance to Kolkata as port.
644: The approximate representation of land use classification in India is
(a) Net are sown 25%, forests 33% other areas 42%
(b) Net are sown 58%, forests 17% other areas 25%
(c) Net are sown 43%, forests 29% other areas 28%
(d) Net are sown 47%, forests 23% other areas 30%
645: Bustard King is found in:
(a) Assam
(b) Himalayan Range
(c) Rajasthan
(d) Madhya Pradesh