Railway GK Questions 2026

Kharif crops are sown in June and July as the south west monsoon arrives and harvested in September and October, and they are the rain dependent crops: rice, jowar, bajra, maize, cotton, groundnut, soyabean and tur.

The National Forest Policy of 1952 laid down that one third of the total geographical area of the country should be under forest, and it fixed separate norms inside that target: about 60 per cent in the hills, where tree cover protects the slopes and the catchments, and about 20…

The ratio tells how many crops the sown land carries in an agricultural year, so a value of a hundred would mean a single crop everywhere and the Indian figure of about 140 per cent means that a large part of the land bears a second crop, mainly where irrigation…

Gross cropped area is a derived measure, not a land use head: it counts a field as many times as it is cropped in an agricultural year, so the same hectare can appear twice or thrice, and it is used with net sown area to calculate cropping intensity.

This head covers land that could be cultivated but has lain unused for more than five years, usually because it has become saline, waterlogged, eroded or short of water, and bringing it back into use is a standing aim of land reclamation programmes.

The Western Dry zone is western Rajasthan, the Thar region west of the Aravalli, with low and uncertain rainfall, sandy soil and a short growing season, so its crops are bajra, moth, guar and other hardy millets and pulses, with animal husbandry as the main support.

The Trans-Gangetic Plain zone lies beyond the Yamuna, that is on the Punjab side of the Ganga system, and takes in Punjab, Haryana, Delhi, Chandigarh and the Ganganagar belt of Rajasthan; its canal and tubewell irrigation supports the wheat and rice rotation of the green revolution.

In 1988 the Planning Commission adopted a division of the country into fifteen agro-climatic zones so that crops, irrigation, credit and research could be planned for areas that are uniform in rainfall, temperature, soil and cropping pattern.

Rajasthan is divided into ten agro-climatic zones, and zone three B is the flood prone eastern plain, which covers Alwar, Bharatpur, Dholpur, Karauli and Sawai Madhopur, the districts drained by the Banganga, Gambhir and Chambal where heavy monsoon flows cause waterlogging.

Torque is r into F into the sine of the angle between them, and since the force here is perpendicular to the rod the sine is one, so the torque is simply 0.5 multiplied by 20, that is 10 newton metre.

Varignon theorem states that the moment of a force about any point equals the algebraic sum of the moments of its components about the same point; it speaks of the moments themselves, not of their squares, so statement S1 is false as written.

Moment of inertia is the sum of each bit of mass multiplied by the square of its distance from the axis, so drawing the arms in reduces it.

A solid cone has more material near its wide base than near its apex, so its centre of gravity lies on the axis of symmetry well below the middle, at one quarter of the height measured from the base, which is three quarters of the height measured down from the…

In a wheelbarrow the wheel is the fulcrum, the load in the tray lies between the wheel and the hands, and the effort is applied at the handles, so the load sits in the middle, which defines a second class lever; a nutcracker, a bottle opener and a lemon squeezer…

In stable equilibrium the original position is the one of least potential energy, so a small displacement lifts the centre of gravity and the weight of the body brings it back, as with a cone resting on its base or a book lying flat on a table.

A zero net force gives translational equilibrium, so the body as a whole does not accelerate, and a zero net torque gives rotational equilibrium, so it does not begin to spin; complete equilibrium requires the two together.

Torque is the product of the force and the perpendicular distance of its line of action from the axis, so the same turning effect can be produced by a smaller force if that distance is made larger; a long handle therefore does the same work with less effort.

The magnitude of torque is r into F into the sine of the angle between the arm and the force, and the sine of an angle is largest, equal to one, at 90 degrees, so the whole of the force is then used in turning the body.

The centre of gravity is a geometrical point through which the resultant weight of a body acts, and by symmetry that point for a uniform ring is its geometrical centre, which lies in the empty space inside the ring.

When three forces are represented by the sides of a triangle taken in order, their vector sum is zero, because the three sides close the triangle, so the body cannot be pushed away; but the lines of action are different, so the system reduces to a couple.