Defence GK Questions 2026

Plantation agriculture is the large-scale growing of a single cash crop such as tea, coffee, rubber, sugarcane, cocoa or bananas, mainly for export.

Per capita GDP is total output divided by total population, and it can be broken into three parts that multiply together.

Around 240 BC Eratosthenes, the librarian of Alexandria in Egypt, learnt that at noon on the summer solstice the Sun shone straight down a well at Syene (modern Aswan), so it was directly overhead there.

Molarity and molality are both standard ways of stating how much solute is present in a solution.

The potato is native to the Andes of South America and reached Europe only after the Spanish conquest of Peru, after which it became a staple that supported a rising population; maize, tomato, chilli, tobacco, groundnut and cocoa travelled the same way, and Indian cooking took the chilli and the…

The two Iberian kingdoms were the pioneers of oceanic voyages, and after the first voyage of Columbus they agreed by the Treaty of Tordesillas in 1494, with the Pope as arbiter, to divide the non Christian world along a line in the Atlantic: lands to the west of it for…

The expedition left Spain in 1519 under Magellan, who crossed the strait now named after him and named the Pacific Ocean for its calm waters.

The Portuguese captain Bartolomeu Dias rounded the southern tip of Africa in 1488. He called it the Cape of Storms, and the king of Portugal renamed it the Cape of Good Hope because the way to India now lay open.

The Council of Trent, summoned by the Pope, sat in several sessions between 1545 and 1563, abolished the worst abuses such as the sale of indulgences, imposed discipline and training on the clergy and restated Catholic doctrine against the Protestants.

When the Pope refused to annul the marriage of Henry the Eighth to Catherine of Aragon, the English Parliament passed the Act of Supremacy in 1534, which declared the king the supreme head of the Church of England and cut the English church off from Rome.

Calvin set out his theology, including the doctrine of predestination, in the Institutes of the Christian Religion in 1536 and built a reformed church order at Geneva that spread to Scotland, the Netherlands and France.

An indulgence was a pardon for sin sold for money, and the campaign to sell indulgences in Germany to pay for building work at Rome was the immediate provocation for Martin Luther, who nailed or posted his Ninety Five Theses at Wittenberg on 31 October 1517 arguing that no payment…

Gutenberg of Mainz in Germany built the first European printing press with movable metal type about the middle of the fifteenth century and printed the Bible that carries his name.

Machiavelli, a Florentine diplomat, wrote the Prince as advice to a ruler on how to win and keep power, judging actions by their results rather than by religious morality, and the word Machiavellian comes from this book.

Francesco Petrarch, an Italian poet and scholar of the fourteenth century, collected and studied classical Latin manuscripts and placed human life, reason and the individual at the centre of learning, which is why he is remembered as the father of humanism.

Constantinople, the capital of the eastern Roman or Byzantine empire, was captured by the Ottoman Turks under Sultan Mehmed the Second in 1453.

Torque is r into F into the sine of the angle between them, and since the force here is perpendicular to the rod the sine is one, so the torque is simply 0.5 multiplied by 20, that is 10 newton metre.

Varignon theorem states that the moment of a force about any point equals the algebraic sum of the moments of its components about the same point; it speaks of the moments themselves, not of their squares, so statement S1 is false as written.

Moment of inertia is the sum of each bit of mass multiplied by the square of its distance from the axis, so drawing the arms in reduces it.

A solid cone has more material near its wide base than near its apex, so its centre of gravity lies on the axis of symmetry well below the middle, at one quarter of the height measured from the base, which is three quarters of the height measured down from the…