RRB Group D GK Questions 2026

It is the standard set of rules used for reflection by spherical mirrors and for the mirror formula. Under this convention the pole of the mirror is the origin and the principal axis is the x-axis.

Bihu is the chief festival and folk dance of Assam. The dance is performed by young men and women in groups to the beat of the dhol and the pepa, a pipe made of buffalo horn, with quick steps and graceful hand movements.

Pochampalli, also written Pochampally, is a weaving town in the Yadadri Bhuvanagiri district of Telangana, not far from Hyderabad. It is famous for ikat sarees, in which the threads are tied and dyed before weaving, so the pattern appears as the cloth is woven.

A johad is a small crescent-shaped earthen dam that villagers build together to catch and store rainwater. It is used mainly in Rajasthan and Haryana, where rain is scarce and falls in only a few months of the year.

The United Nations General Assembly named 5 June as World Environment Day in 1972, and the day has been observed every year since 1974.

Sulphur dioxide and nitric oxide are the gases behind acid rain. When coal, petrol and diesel are burnt in power plants, factories and vehicles, they release sulphur dioxide and oxides of nitrogen such as nitric oxide.

At great heights the air is thin, so the atmospheric pressure acting on the body is much lower than at sea level.

Bronze is made by melting copper and tin together, with copper as the main metal. It is harder than pure copper and does not corrode easily, so it has been used for statues, bells, medals and utensils for thousands of years.

All three are needed by plants only in very small amounts, which makes them micronutrients. Plants need macronutrients in large amounts: nitrogen, phosphorus and potassium as primary nutrients, and calcium, magnesium and sulphur as secondary ones.

Of the three, only citrus canker is caused by bacteria; rust of wheat is caused by a fungus and yellow vein mosaic of bhindi by a virus.

The pituitary gland sends out hormones that order the thyroid and the adrenal glands to release their own hormones. The pituitary is a pea-sized gland attached to the base of the brain, and it is called the master gland because it controls several other endocrine glands.

The rough strip of a safety matchbox is coated with powdered glass and a little red phosphorus, while the head of the matchstick carries antimony trisulphide and potassium chlorate.

Both events are real steps in the reorganisation of states on the basis of language, but the division of Punjab in 1966 cannot be the reason for what happened to Bombay six years earlier.

The ward member, the Panchayat President and the ward councillor are all chosen by voters, but the Secretary is an appointed official.

The ideals of liberty, equality and fraternity in the Preamble of the Indian Constitution come from the French Revolution of 1789, whose famous slogan was made of these three words.

These three provisions keep judges free from pressure by the other organs of government, while the oath given by the President is only a formality.

Andhra Pradesh lies on the east coast of India, so its shoreline faces the Bay of Bengal. Its coast runs from the border of Odisha in the north to Tamil Nadu in the south, and the Godavari and Krishna rivers build rich deltas on it before entering the sea.

Land and sea breezes blow over a small coastal area and change direction every day, so they are local winds.

Mount Kilimanjaro and Fujiyama were both built up by volcanic eruptions, while the Alps were formed by folding. Kilimanjaro in Tanzania is the highest mountain in Africa, and Fujiyama, or Mount Fuji, is the highest mountain in Japan.

This statement is wrong on both counts: the Act was passed in 1878, and it was meant to silence newspapers that criticised the Government, not to support it.