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

Answer: (d)

Apollo 11 was the spaceflight that landed the first humans, Americans Neil Armstrong and Buzz Aldrin, on the Moon on July 20, 1969. Armstrong became the first to step onto the lunar surface 6 hours later on July 21.

Armstrong spent about two and a half hours outside the spacecraft, Aldrin slightly less; and together they collected 47.5 pounds (21.5 kg) of lunar material for return to Earth.

A third member of the mission, Michael Collins, piloted the command spacecraft alone in lunar orbit until Armstrong and Aldrin returned to it for the trip back to Earth. Launched by a Saturn V rocket from Kennedy Space Center in Merritt Island, Florida on July 16, Apollo 11 was the fifth manned mission of NASA’s Apollo program.

Answer: (a)

U.N.’s International Atomic Energy Agency (IAEA) approved the U.S.-backed scheme to establish a reserve of low-enriched uranium (LEU), the IAEA has yet to conclude negotiations with Kazakhstan, the country that will host the fuel bank.

Answer: (c)

A multiple independently targetable re-entry vehicle (MIRV) warhead is a collection of separate warheads. By contrast, a unitary warhead is a single warhead on a single missile. It provides greater target damage for a given missile payload.

With a MIRV warhead, the post-boost (or bus) stage can dispense the warheads against multiple targets across a broad area. It reduces the effectiveness of an anti-ballistic missile system that relies on intercepting individual warheads.

While a MIRV attacking missile can have multiple warheads (3–12 on United States missiles and 3-10 on Russian), interceptors may have only one warhead per missile. Thus, in both a military and an economic sense, MIRVs render ABM systems less effective.

Answer: (d)

It is fueled by liquid Oxygen and liquid Hydrogen propellants. GSAT-6 satellite was carrying S-Band and C-Band transponders meant for public and strategic purposes.

Answer: (d)

This suit gives pilot an additional capability of nullifying the effect of detected radar threat by appropriate mode of jamming.

Answer: (d)

The Vikram Sarabhai Space Centre (VSSC) is located in Thiruvananthapuram. The centre had its beginnings as the Thumba Equatorial Rocket Launching Station (TERLS) in 1962. It was renamed in honor of Dr. Vikram Sarabhai, the father of the Indian space program.