NDA Government Jobs Exams

SONAR is mostly used by
(A) Doctors (B) Engineers (C) Astronauts (D) Navigators

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NDA Other Question

Telescopes are placed in space to view distant galaxies primarily to
(A) get closer to the observed objects
(B) avoid the absorption of light or other radiations in the atmosphere of the earth
(C) avoid light pollution from the earth's populated areas
(D) avoid steering the telescope against the earth's motion
A bucket full of water is kept in a room and it cools from 75ºC to 70ºC in time T1 minutes, from 70ºC to
65ºC in time T2 minutes, and from 65ºC to 60ºC in time T3 minutes, then
(A) T1 = T2 = T3 (B) T1 < T2 < T3 (C) T1 > T2 > T3 (D) T1 < T3 < T2