science & tech MCQ section 3 MCQ Questions & Answers Detailed Explanation

Answer: (a)

Sputnik 1 was the first artificial Earth satellite. It was a 585 mm diameter polished metal sphere, with four external radio antennae to broadcast radio pulses. The Soviet Union launched it into an elliptical low Earth orbit on 4 October 1957.

Answer: (b)

The Indian Space Research Organisation (ISRO) is the primary space agency of the Indian government. ISRO is amongst the six largest government space agencies in the world, along with NASA, RKA, ESA, CNSA and JAXA. Its primary objective is to advance space technology and use its applications for national benefit. Established in 1969, ISRO superseded the erstwhile Indian National Committee for Space Research (INCOSPAR).

Headquartered in Bangalore, ISRO is under the administrative control of the Department of Space, Government of India. ISRO has achieved numerous milestones since its establishment. India’s first satellite, Aryabhata, was built by ISRO and launched by the Soviet Union in 1975. Rohini, the first satellite to be placed in orbit by an Indian-made launch vehicle, SLV-3, was launched in 1980.

ISRO subsequently developed two other rockets: the Polar Satellite Launch Vehicle (PSLV) for putting satellites into polar orbits and the Geosynchronous Satellite Launch Vehicle (GSLV) for placing satellites into geostationary orbits.

These rockets have launched numerous communications satellites, earth observation satellites, and, in 2008, Chandrayaan-1, India’s first mission to the Moon.

Answer: (d)

Scientists believe that this finding could potentially support life. NASA’s Galileo mission had provided first evidence of ocean in Ganymede after measuring its magnetic field in 2002.

Answer: (a)

Thorium is for more abundant in nature than uranium.

Answer: (c)

Twitter Chief Executive Dick Costolo. Mark Elliot Zuckerberg is the founder of social networking website Facebook.

Answer: (c)

Sunita Williamswas launched to the International Space Station (ISS) with STS-116, aboard the Space Shuttle Discovery, on December 9, 2006, to join the Expedition 14 crew. Discovery is one of the orbiters from NASA’s Space Shuttle program and the third of five fully operational orbiters to be built.