Defence GK Questions 2026

Reactor number four of the Chernobyl plant, in Ukraine in the then Soviet Union, exploded on 26 April 1986 and scattered radioactive iodine, caesium and strontium over a wide area of Europe.

The becquerel, symbol Bq, is the SI unit of activity and equals one disintegration per second.

Strontium lies just below calcium in the same group of the periodic table and behaves chemically like it, so strontium-90 taken in through milk, water or food is deposited in bone and in teeth in place of calcium.

A cooling tower releases the heat of used cooling water to the atmosphere by evaporation or by air flow, so that the water leaving the plant is close to the temperature of the receiving river or lake.

Thermal and nuclear power stations draw large volumes of water to condense steam and return it several degrees warmer, which makes them the single largest source of waste heat in rivers, lakes and coastal waters.

The solubility of a gas in water decreases as the temperature of the water rises, so hot water discharged from a power station holds less dissolved oxygen.

The Rules define a silence zone as the area up to 100 metres around a hospital, an educational institution or a court, and such an area has to be declared by the competent authority.

The Rules of 2000 lay down 55 decibel as the day-time limit and 45 decibel as the night-time limit for a residential area.

The Noise Pollution (Regulation and Control) Rules were notified in the year 2000 and they were framed under the Environment (Protection) Act, 1986.

The decibel, written dB, is the unit in which the intensity level of sound is expressed, and it is named after Alexander Graham Bell.

It admitted Sikkim as the twenty-second State of the Indian Union, inserted it into the First Schedule and omitted the earlier provisions that had given it a special status.

It amended the First Schedule to give effect to the acquiring of territories by India and the transfer of certain territories to Bangladesh under the Land Boundary Agreement, settling a dispute that had lasted since Partition.

Telangana was carved out of Andhra Pradesh under the Andhra Pradesh Reorganisation Act of 2014 and came into existence on 2 June 2014, which is observed as its formation day.

The Seventh Constitutional Amendment Act of 1956 accompanied the States Reorganisation Act, abolished the old classification of States into Parts A, B, C and D, and reorganised the country into fourteen States and six Union territories.

It was carved out of the Madras Presidency in 1953 for Telugu speakers, after the death of Potti Sriramulu on a fast unto death pressed the demand to a point the government could not resist.

The States Reorganisation Commission was appointed in 1953 under the chairmanship of Fazl Ali and submitted its report in 1955.

The President sought the advisory opinion of the Supreme Court on whether the agreement to transfer part of the Berubari Union to Pakistan could be carried out under Article 3.

Article 4 states that a law made under Article 2 or Article 3 may contain provisions for amending the First Schedule, which lists the States and Union territories, and the Fourth Schedule, which allots Rajya Sabha seats, and that no such law shall be deemed to be an amendment of…

The proviso to Article 3 lays down two conditions. First, such a Bill may be introduced in either House only on the recommendation of the President.

Article 2 provides that Parliament may by law admit into the Union, or establish, new States on such terms and conditions as it thinks fit.