RRB Group D GK Questions 2026

Sonar sends a pulse of sound into the water and times the echo returning from the sea bed, a shoal of fish or a submarine; since the speed of sound in sea water is roughly 1,500 metres a second, the time gives the distance.

NavIC is the name given to the Indian Regional Navigation Satellite System, or IRNSS, built by ISRO to give position fixes over India and a region around it, independent of the American GPS.

The Act was passed in 2005 as the National Rural Employment Guarantee Act and renamed after Mahatma Gandhi in 2009.

Radar sends out radio waves and measures the echo that returns from an object, so the time taken gives the distance, or range, and the shift in frequency gives the speed by the Doppler effect.

The agency was created by the General Assembly in 1946 as the United Nations International Children's Emergency Fund, for children in countries ruined by the Second World War, and in 1953 it was made a permanent part of the United Nations and renamed the United Nations Children's Fund, keeping the…

The IFSC is an eleven-character alphanumeric code that identifies a particular bank branch in the electronic payment systems operated by the Reserve Bank of India, and it is required for NEFT and RTGS transfers.

A laser produces a narrow, coherent, single-wavelength beam by stimulated emission, in which an excited atom is made to release a photon identical to the one that strikes it.

NITI Aayog replaced the Planning Commission on 1 January 2015 and works as the policy think tank of the Government of India.

When Telangana was separated in 2014 the two states shared the old High Court at Hyderabad for a few years; a separate Andhra Pradesh High Court was then constituted and began functioning at Amaravati, the new capital on the bank of the Krishna, on 1 January 2019, while the court…

Mangampet, in the Kadapa basin of Rayalaseema, holds one of the world's largest single deposits of barytes, the ore of barium, which is used as a weighting agent in oil well drilling mud, in paint and in glass.

The Eastern Naval Command has its headquarters at Visakhapatnam in Andhra Pradesh, the only natural harbour on India's eastern seaboard, and the city also has the Hindustan Shipyard, a submarine base and the Visakhapatnam Steel Plant.

The Veerabhadra temple at Lepakshi in the Anantapur region was built in the Vijayanagara period and is known for its painted ceilings, its carved Natya Mandapa, the great monolithic Nandi nearby and the hanging pillar that does not rest firmly on the floor.

The temple of Venkateswara, also called Balaji, stands on the seventh of the Tirumala hills above the town of Tirupati and is administered by the Tirumala Tirupati Devasthanams; it draws more pilgrims than any other temple in the country and its annual Brahmotsavam is the chief temple festival of the…

The Belum Caves lie in the Kurnool region of Rayalaseema and are the longest caves in the plains of the subcontinent, cut in limestone by an underground stream, with long galleries, siphons and a deep point called Pataalaganga.

Kolleru is a large shallow freshwater lake lying in the low ground between the deltas of the Godavari and the Krishna; it acts as a natural flood balancing reservoir for the two rivers, is a wintering ground for pelicans and painted storks, and was declared a Ramsar site of international…

Kuchipudi is named after the village of Kuchipudi, or Kuchelapuram, in the Krishna delta, where the dance drama tradition of the Bhagavata Mela was carried on; Siddhendra Yogi is remembered as the figure who gave it its form, and the Tarangam, danced on the rim of a brass plate, is…

The Satish Dhawan Space Centre stands on Sriharikota island on the coast of the Nellore region, between the Pulicat lake and the Bay of Bengal, and every Indian orbital launch, by PSLV, GSLV, SSLV or LVM3, lifts off from there; the site is named after Satish Dhawan, a former chairman…

Telangana came into being on 2 June 2014 under the Andhra Pradesh Reorganisation Act, 2014, becoming the twenty-ninth state of the Union, and Hyderabad was to serve as the joint capital of both states for a transitional period while Andhra Pradesh built its new capital at Amaravati.

He fasted for a separate Telugu-speaking province and died on 15 December 1952 on the fifty-eighth day of the fast; the protests that followed made the government concede the demand within days, and Andhra State was created the next October.

Andhra State was created on 1 October 1953 out of the Telugu-speaking districts of the old Madras State, with Kurnool as its capital and Tanguturi Prakasam as its first Chief Minister, and it was the first state in independent India carved out on the basis of language.