science & tech MCQ section 4 MCQ Questions & Answers Detailed Explanation

Answer: (c)

Radar (Radio Detection And Ranging) is an object-detection system that uses radio waves to determine the range, altitude, direction, or speed of objects. It can be used to detect aircraft, ships, spacecraft, guided missiles, motor vehicles, weather formations, and terrain.

Answer: (c)

This joint military exercise is being held Bikaner (Rajasthan). It is the 7th edition of the annual series of joint military exercises between India and Russia.

Answer: (c)

The bomb had successfully hit a target 100 km away in the Bay of Bengal off the Odisha coast.

Answer: (c)

Neil Alden Armstrong was an American astronaut and the first person to walk on the Moon. Apollo 11 was the spaceflight that landed the first humans, Americans Neil Armstrong and Buzz Aldrin, on the Moon on July 20, 1969.

Answer: (c)

Scientists at the University of Edinburgh’s School of Biological Sciences in the second week of January 2013 discovered that the oldest known super predator of the world was the Marine Crocodile.

Answer: (c)

Chandrayaan-1 was India’s first unmanned lunar probe. It was launched by the Indian Space Research Organisation in October 2008 and operated until August 2009.

The mission included a lunar orbiter and an impactor. India launched the spacecraft with a modified version of the PSLV, PSLV C11 on 22 October 2008 from Satish Dhawan Space Centre, Sriharikota, Nellore District, Andhra Pradesh.

Note: Chandrayaan-2 is India’s second lunar exploration mission after Chandrayaan-1.

Developed by the Indian Space Research Organization, the mission is planned to be launched to the Moon by a Geosynchronous Satellite Launch Vehicle. The ISRO is planning to launch Chandrayaan-2 in the first quarter of 2018.