SSC GD Constable GK Questions 2026

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.

Delhi first became a capital under the Tomar Rajputs, who founded the town of Dhillika, or Dilli, and built Lal Kot near present day Mehrauli, the earliest of the seven cities of Delhi.

Balban sat on the throne of the Delhi Sultanate from 1266 to 1287. He had been a slave of Iltutmish and one of the Chalisa, the band of forty Turkish nobles, and served as naib to the weak Sultan Nasiruddin Mahmud before taking power himself.

In its middle course, over the gentle slope of the plain, a river loses the power to cut downward and begins to swing from side to side.

Amanta is formed from ama, the new moon, and anta, the end, so the month closes on the new moon day and the next month opens with the bright fortnight; Maharashtra, Karnataka, Andhra Pradesh, Telangana, Tamil Nadu and Gujarat follow it.

The word panchang is made of panch, meaning five, and anga, meaning limb, and the five limbs recorded for every day are the tithi or lunar day, the vara or weekday, the nakshatra or lunar mansion, the yoga and the karana.

The Julian calendar then in use counted the year slightly too long, and by the sixteenth century the error had grown to ten days; the Pope's reform of 1582 dropped those days and changed the leap year rule, so that a century year is a leap year only when it…

The astrophysicist, known for the Saha ionisation equation that explains the spectra of stars, headed the committee set up under the Council of Scientific and Industrial Research in 1952; it reported in 1955 and the calendar it recommended came into use on 22 March 1957.

The Gupta era, dated to 319 or 320 CE, is taken to begin with the accession of Chandragupta I, the first great ruler of the dynasty, and most Gupta inscriptions are dated in it.

Its months follow the phases of the moon and no month is ever added to bring the year back into line with the seasons, so twelve lunar months give about 354 days and the Hijri year slips about eleven days earlier against the Gregorian year; that is why Ramzan can…

That journey of 622 CE is called the Hijrat, and the era takes its name from it; the first month of the Hijri year is Muharram.

Vikram Samvat began in 57 BCE, so the Vikrami year is obtained by adding 57 to the Christian year; this is the era printed on wedding invitations and traditional almanacs in northern India and is the official calendar of Nepal.

The Saka reckoning is most often linked with the Kushana ruler Kanishka, and it is the era on which the Indian National Calendar is built, so the Saka year is about 78 less than the Christian year.

The national calendar begins on 1 Chaitra, which corresponds to 22 March in an ordinary year and to 21 March in a leap year, so that the year opens near the spring equinox.

That day was 1 Chaitra 1879 of the Saka era, and the calendar came into use on the recommendation of the Calendar Reform Committee, which had reported in 1955.