science & tech MCQ section 6 MCQ Questions & Answers Detailed Explanation

Answer: (d)

GSLV is three staged vehicle equipped with solid propellant at first stage, liquid at second and cryogenic engine at third and PSLV is 4 marked by alternate solid and liquid busters.

Answer: (d)

MESSENGER (an acronym of MErcury Surface, Space ENvironment, GEochemistry and Ranging) is a robotic NASA spacecraft orbiting the planet Mercury, the first spacecraft ever to do so.

The 485-kilogram spacecraft was launched aboard a Delta II rocket in August 2004 to study Mercury’s chemical composition, geology, and magnetic field. It became the second mission after 1975’s Mariner 10 to reach Mercury successfully when it made a flyby in January 2008, followed by a second flyby in October 2008, and a third flyby in September 2009.

Answer: (a)

The name “Brahmos” has been derived from the names of two rivers namely the Brahmaputra of India and the Moskva of Russia.

Answer: (d)

Agni-II is a medium-range ballistic missile (MRBM) with two solid-fuel stages and a Post Boost Vehicle (PBV) integrated into the missile’s Re-entry Vehicle (RV). When the Agni-II was first launched, then Defence Minister George Fernandes indicated that the maximum range of the Agni-II was 3,000 km.

Since then, ranges from 2,000 km to 2,500 km have been stated, while Dr Kalam, at Aero India ’98, stated that Agni-II had a maximum range of 3,700 km. The Agni’s manoeuvring RV is made of a carbon-carbon composite material that is light and able to sustain high thermal stresses of re-entry, in a variety of trajectories.

The Ghauri-II is a medium-range ballistic missile (MRBM). A longer ranged variant of the GhauriI, it was developed by increasing the length of the motor assembly and using improved propellants. The Ghauri-II missile has a maximum range of 2,000 km.

Answer: (a)

Statement 3 is incorrect as the thickness of BD is 1.1 mm while that of DVD is 1.2 mm.

The difference lies in capacity so statement 2 is correct. As far as statement 1 is concerned.

Answer: (c)

INS Kolkata is a missile-guided destroyer provided with anti-air missiles, anti-ship missiles and guns and capability for anti-submarine warfare.