RRB Group D GK Questions 2026

The grooves cut into a sole grip the ground, so the foot does not slip while walking or running. Friction is the force that acts between two surfaces in contact and opposes motion between them.

A concave lens is a diverging lens, so for every position of a real object it forms an image that is virtual, erect and diminished.

Acoustics is the branch of physics that deals with how sound is produced, how it travels and how it is heard or absorbed.

Drosera, known as the sundew, is an insect-eating plant whose leaves are covered with stalked glands tipped with a shining drop of sticky fluid.

He won his bronze in the men's 5000m, an individual distance race, and was not a member of the relay squad.

Gulveer Singh finished on the podium in this distance race, and the Prime Minister described the result as a remarkable hat-trick of podium finishes for him at these Games, praising his consistency, endurance and determination.

She won the bronze medal in the women's high jump at the Asian Games 2026, and the medal carries extra weight because it is India's first in that event at the Asian Games in more than two decades.

In the colour code used for fire extinguishers, a black band or label marks a carbon dioxide extinguisher. The body of the cylinder is signal red and a coloured patch near the label tells you the filling at a glance, so the right cylinder can be picked in a hurry.

Fires are sorted into classes by what is burning, and Class A covers ordinary solid fuels — wood, paper, cloth, straw, rubber and many plastics.

The pulmonary artery is the one artery in the body that carries deoxygenated blood. It leaves the right ventricle and takes blood that has returned from the body's tissues to the lungs, where carbon dioxide is given up and fresh oxygen is picked up.

Animal tissues are grouped into four kinds — epithelial, muscular, connective and nervous — and areolar is not one of them, because it is only a type of connective tissue.

A wet chemical extinguisher sprays a fine mist of a potassium salt solution — usually potassium acetate, potassium citrate or potassium carbonate — so potassium is the working element inside it.

The domestic goat is treated as a subspecies of the wild goat, so its name carries three parts — the genus Capra, the species aegagrus and the subspecies hircus.

The alveoli are the tiny balloon-like air sacs at the ends of the smallest airways, and their thin walls are the surface where gases are exchanged.

Hampi stands on the south bank of the Tungabhadra river in the Vijayanagara district of Karnataka, and it was the capital of the Vijayanagara empire founded by Harihara and Bukka in 1336.

Along with dedicating the completed elevated road, the Union Home Minister laid the foundation stones of these two works, which together with the road make up the package of projects worth more than Rs 1,941 crore.

The Home Minister stated that the newly dedicated phase of the Barapullah corridor would give signal-free connectivity between the eastern and the southern parts of the capital, so that commuting becomes smoother, motorists get relief from traffic jams and travel time is saved.

The Union Home Minister and Minister of Cooperation dedicated the Barapullah Elevated Road Phase-3, built at that cost, to the people of Delhi.

As part of Swachhata Hi Seva 2026 the Union Minister inaugurated a Reduce, Reuse and Recycle Centre at Sankalp Bhawan in New Delhi, and it has been described as the first such centre in a Union Ministry office.

The Ministry launched the third cohort of startups working on sanitation and waste management in collaboration with the Startup Incubation and Innovation Centre at IIT Kanpur.