RRB NTPC GK Questions 2026

In the equatorial belt the ground is strongly heated through the morning, the warm moist air rises in powerful convection currents, cools as it rises, condenses into towering cumulonimbus and falls as a short, very heavy shower in the afternoon, which is why it is nicknamed four o'clock rain.

The cumulonimbus is a cloud of great vertical extent that can rise from near the ground almost to the top of the troposphere, and the strong updraughts inside it produce thunder, lightning, heavy showers and hail; it is the cloud of the thunderstorm and the eye wall of a cyclone…

Relative humidity compares the water vapour actually present in the air with the maximum amount the air could hold at that temperature, so it is a ratio and is stated as a percentage; air at a hundred per cent relative humidity is saturated.

A hygrometer measures the humidity of the air, and the common working form is the psychrometer, a pair of wet and dry bulb thermometers whose difference in reading is converted into relative humidity with a table.

Julia was a storm of the Atlantic basin and never approached India, so it cannot belong to a list of Indian landfalls.

The local names of the tropical cyclone are a standing favourite: baguio belongs to the Philippines, hurricane to the United States and the wider Atlantic and Caribbean region, typhoon to China and the north-western Pacific, and willy-willy to Australia.

Tauktae formed in the Arabian Sea in May 2021, intensified into an extremely severe cyclonic storm, moved north along the Konkan coast and made landfall in Gujarat, which is why it is remembered as an Arabian Sea system of the western coast.

The eye of a tropical cyclone is the roughly circular column of calm, descending air at its centre, usually a few tens of kilometres across, where the pressure is lowest, the winds are light and the sky is often nearly clear.

SAGA-220 was built by the Indian Space Research Organisation in 2011 using graphics processing units, so that pair is correct.

A supercomputer's performance is stated in FLOPS, the number of floating point calculations it completes in a second, which is why the figures appear as teraflops, petaflops and exaflops; a petaflop is a thousand trillion such operations a second.

Pratyush was installed at the Indian Institute of Tropical Meteorology in Pune in 2018, with a companion system, Mihir, at the National Centre for Medium Range Weather Forecasting, and the pair was acquired to run high-resolution models for monsoon forecasting, cyclone tracks and climate studies.

The National Supercomputing Mission, approved in 2015, is steered jointly by the Ministry of Electronics and Information Technology and the Department of Science and Technology, and it is implemented by the Centre for Development of Advanced Computing at Pune together with the Indian Institute of Science at Bengaluru.

PARAM Shivay, commissioned in 2019 at the Indian Institute of Technology at Banaras Hindu University in Varanasi, was the first supercomputer installed under the National Supercomputing Mission, which was approved in 2015.

The Education and Research Network, ERNET, was begun in 1986 by the Department of Electronics with support from the United Nations Development Programme to link universities, the Indian Institutes of Technology and research laboratories, and it carried the first academic internet traffic in India.

ECIL was set up at Hyderabad in 1967 under the Department of Atomic Energy to make electronic equipment for the atomic energy programme, and it produced the TDC series, the Trombay Digital Computers, for laboratory and industrial use.

The HEC-2M, brought from Britain, was installed at the Indian Statistical Institute in 1955 and is counted as the first computer to work in India; the institute later added a Soviet URAL machine and in 1966 built the ISIJU with Jadavpur University.

C-DAC was established at Pune in 1988 under the Department of Electronics, with a mission to design and build an indigenous supercomputer after the United States declined to supply a Cray machine to India.

Vijay Bhatkar led the team at C-DAC that built PARAM 8000 in 1991 and is therefore described as the architect of India's PARAM series of supercomputers.

The Centre for Development of Advanced Computing was set up at Pune in 1988 with the specific task of building an indigenous supercomputer after India was refused an American Cray machine, and in 1991 its team completed PARAM 8000, a parallel computer assembled from transputer processors.

The TIFR Automatic Calculator was completed at the Tata Institute of Fundamental Research in Mumbai in 1960 and is counted as the first digital computer designed and built in India; Jawaharlal Nehru gave it the name TIFRAC.