Defence, space and nuclear technology of India MCQ - Practice Questions with Answers

Plainly that India is not a signatory to the Nuclear Non-Proliferation Treaty, even though it joined the Missile Technology Control Regime in 2016, the Wassenaar Arrangement in 2017 and the Australia Group in 2018. The other claims hold true: the Department of Atomic Energy was set up in 1954, Pokhran-I in 1974 was India's first nuclear test, and stage one of the three-stage programme uses pressurised heavy-water reactors on natural uranium. So the claim of NPT membership is the incorrect one.

ISRO was formed on 15 August 1969 from the earlier INCOSPAR base, shifting India's space effort from sounding rockets to national development uses such as communication, weather and resource mapping. The Department of Atomic Energy dates to 1954 and the DRDO to 1958, while the Department of Space and the Space Commission followed in 1972. So the founding year of the space agency itself is 1969, marked on 15 August.

There is a firm line between launch vehicles and satellites. PSLV, GSLV and LVM3 are launch vehicles that carry payloads to orbit, so the first statement is accurate. INSAT, by contrast, is a satellite system that supports communication and meteorology; it is a payload, not a launch vehicle. Therefore the second statement is wrong, and only the first statement stands correct.

A geostationary orbit lies about 35,786 km above the equator, where a satellite circles in step with Earth's rotation and appears fixed over one longitude, which suits communication and weather work. NavIC, by contrast, is a navigation service that supplies position, navigation and timing signals; it does not photograph fields or forests, as remote-sensing satellites do. So the orbit statement is correct while the NavIC-imaging claim is wrong, leaving only the first statement true.

Defence platforms differ by role and flight path. BrahMos is a supersonic cruise missile developed through India-Russia cooperation; Agni is a ballistic missile family tied to strategic deterrence; Akash is a surface-to-air missile; and Tejas is a light combat aircraft, not a missile at all. Matching each to its true class pairs BrahMos with the cruise missile, Agni with the strategic ballistic missile, Akash with the surface-to-air missile and Tejas with the light combat aircraft.