RRB Group D GK Questions 2026

Cryogenics deals with the production of very low temperatures and with the behaviour of materials at those temperatures, where liquefied gases such as liquid nitrogen, oxygen and hydrogen are used; it is applied in rocket engines with cryogenic upper stages, in superconducting magnets and in the preservation of biological material…

Speleology is the exploration and scientific study of caves, their formation, the limestone features such as stalactites and stalagmites that develop in them, and the animal life adapted to permanent darkness.

Pedology is the study of soils, including their formation from parent rock, their profile and horizons, their classification and their fertility, and it is the science behind soil surveys and land capability maps.

Entomology is the branch of zoology that deals with insects, the largest class of animals, and it covers their structure, classification, life cycles and their role as pests and pollinators.

Sericulture is the rearing of silkworms for the production of raw silk, and it includes the growing of mulberry, on whose leaves the mulberry silkworm feeds; India produces mulberry silk as well as the wild varieties tasar, eri and muga, the last being special to Assam.

Palaeontology is the study of fossils, the preserved remains or traces of organisms of past geological ages, and it supplies the evidence on which the history of life and the theory of evolution rest.

Seismology is the study of earthquakes and of the passage of seismic waves through the earth, and it is from seismic wave records that the layered structure of the interior of the earth has been worked out; the instrument used is the seismograph.

Ornithology is the study of birds, their classification, habits, migration and nesting; Salim Ali, known as the birdman of India, was the country's best known ornithologist and wrote the Book of Indian Birds.

Mycology is the study of fungi, the group that includes moulds, yeasts, mushrooms and the rusts and smuts that attack crops, and a specialist in it is called a mycologist.

Debris falling from the valley sides collects along each edge of a glacier as a lateral moraine; where a tributary glacier joins the trunk glacier, the inner lateral moraine of each merges into a single dark stripe of rock waste that runs down the middle of the combined ice, and…

A glacier moving to the coast deepens its valley below the level of the sea; when the ice melts, salt water enters the deep U-shaped trough and leaves a long, narrow, steep-sided inlet, the fjord, of which the coasts of Norway, Chile, Greenland and New Zealand give the best examples.

Bara Shigri descends from the Pir Panjal and Great Himalayan slopes into the valley of the Chandra river, which joins the Bhaga at Tandi to form the Chandrabhaga or Chenab.

The Zemu glacier lies in North Sikkim at the eastern base of Kangchenjunga, the highest peak in India, and its meltwater reaches the Teesta river.

A glacier fills the whole floor of a valley and erodes its sides as well as its bed, so it widens and deepens the valley into a trough with a broad flat floor and steep straight walls, which in section looks like the letter U. Option A is wrong because…

A drumlin is a smooth oval mound of till, the unsorted debris left by ice, shaped like an inverted spoon with its steeper end facing the direction from which the glacier came; a group of drumlins produces what is called basket-of-eggs topography.

A cirque, also called a corrie, is the armchair-shaped hollow that a glacier scoops at the head of its valley by plucking and abrasion; when the ice melts, water collects in the rock basin and the small round lake so formed is a tarn.

The Pamir knot is the node where the Himalaya, the Karakoram, the Hindu Kush, the Kunlun and the Tian Shan ranges meet, and the Fedchenko glacier, running for roughly seventy-seven kilometres, is the longest glacier found anywhere outside the Arctic and the Antarctic.

Antarctica holds the greater part of the ice of the earth, so its outlet glaciers dwarf those of other continents.

The Gangotri glacier ends in a snout shaped like the mouth of a cow, which gives it the name Gaumukh, and the stream that issues from it is the Bhagirathi.

Its meltwater feeds the Nubra river, a tributary of the Shyok, which joins the Indus.