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Railway GK Questions 2026

Static GK in railway exams starts with one shared block: Class 10 science. Every RRB exam on GK24 tests it. Group D has 25 questions on Physics, Chemistry and Life Sciences of 10th CBSE level. JE has 30 in CBT-1 and another 15 on Physics and Chemistry in CBT-2. ALP tests General Science in CBT-1 and Basic Science and Engineering in CBT-2, and NTPC lists general science up to 10th inside General Awareness. Beyond science, the lists differ. NTPC names history and the freedom struggle, geography, polity, the economy, art and culture, environment, computers, abbreviations, transport systems in India, world organisations and government bodies. JE names geography, history and culture, polity, the economy and environmental issues, and adds computers and pollution control in CBT-2. This page holds GK24's topic-wise GK notes for railway exams in English and Hindi: General Science, History, Geography, Polity, Economy, Art and Culture, Environment, Computers and static GK, including Indian Railways. Each note is short facts and tables that can be revised in one sitting. Begin with the science notes, since they serve every railway exam, then add the static topics your exam lists, and test each note with its quiz.

Railway GK Questions with Answers

Q5981.General ScienceAsked in: CDS · CDS-II 2024, GKMedium

Which one among the following statements for the gases mentioned below is not correct?

  1. A.Hydrogen has 3 isotopes.
  2. B.Helium is a commonly used gas in electric bulbs.
  3. C.Oxygen is used to burn fuel in rocket engines in spacecraft.
  4. D.Nitrogen can be used in gaseous form to replace air in food packaging.
Show answer
Correct answer: B. Helium is a commonly used gas in electric bulbs.

Filament bulbs are commonly filled with argon, often mixed with nitrogen, not helium. An inert gas in a filament bulb slows the evaporation of the hot tungsten filament.

Q5982.General ScienceAsked in: CDS · CDS-II 2025, GKMedium

Which one of the following is not a property of 'graphene'?

  1. A.It is the thinnest material known so far.
  2. B.It is almost completely transparent.
  3. C.It is highly conducting.
  4. D.It is a wide band-gap semiconductor.
Show answer
Correct answer: D. It is a wide band-gap semiconductor.

Graphene is not a wide band-gap semiconductor; it has practically zero band gap and behaves like a semimetal.

Q5983.General ScienceAsked in: CDS · CDS-I 2026, GKMedium

Which one among the following statements related to electric cells is correct?

  1. A.A primary cell is rechargeable.
  2. B.A secondary cell can be used only once.
  3. C.The emf of a battery is the power provided by the battery per unit current.
  4. D.The unit of emf is Joule.
Show answer
Correct answer: C. The emf of a battery is the power provided by the battery per unit current.

The emf of a battery equals the power it supplies divided by the current it drives, because power P = EI.

Q5985.General ScienceAsked in: CDS · CDS-I 2017, GKEasy

Bleeding of gums, falling of teeth, fragile bones and delayed wound healing occur due to the deficiency of which one of the following vitamins?

  1. A.Vitamin C
  2. B.Vitamin K
  3. C.Vitamin D
  4. D.Vitamin B
Show answer
Correct answer: A. Vitamin C

These are the signs of scurvy, the disease caused by a lack of vitamin C (ascorbic acid). Vitamin C is needed to make collagen, the protein that holds together gums, skin, blood vessels and bone.

Q5987.General ScienceAsked in: CDS · CDS-I 2018, GKMedium

Consider the following statements:

1. There is no net moment on a body which is in equilibrium.

2. The momentum of a body is always conserved.

3. The kinetic energy of an object is always conserved.

Which of the statements given above is/are correct?

  1. A.1, 2 and 3
  2. B.2 and 3 only
  3. C.1 and 2 only
  4. D.1 only
Show answer
Correct answer: D. 1 only

A body in equilibrium has no net force and no net moment on it, while neither momentum nor kinetic energy is conserved in every situation.

Q5990.General ScienceAsked in: CDS · CDS-I 2022, GKEasy

Which one of the following statements is correct about the cell membrane?

  1. A.It is made up of cellulose.
  2. B.It is a permeable structure for all substances.
  3. C.It is flexible and enables the cell to engulf many materials.
  4. D.It does not allow diffusion of gases like oxygen and carbon dioxide.
Show answer
Correct answer: C. It is flexible and enables the cell to engulf many materials.

The cell membrane is flexible, and this lets a cell fold it around food and other material and take it in.

Q5991.General ScienceAsked in: CDS · CDS-II 2022, GKMedium

Which one of the following statements about the process of photosynthesis is correct?

  1. A.Light energy is directly converted to kinetic energy which oxidizes carbon dioxide.
  2. B.Light energy is directly converted to chemical energy which causes reduction of water.
  3. C.Chlorophyll absorbs the chemical energy of light which causes oxidation of carbon dioxide.
  4. D.Chlorophyll absorbs light energy which causes splitting of water molecules and reduction of carbon dioxide.
Show answer
Correct answer: D. Chlorophyll absorbs light energy which causes splitting of water molecules and reduction of carbon dioxide.

Chlorophyll absorbs light energy, which is used to split water and then to reduce carbon dioxide to sugar. In the light reactions, energy trapped by chlorophyll splits water molecules (photolysis), releasing oxygen, hydrogen ions and electrons and producing ATP and NADPH.

Q5992.General ScienceAsked in: CDS · CDS-II 2024, GKEasy

The surface of the concrete structure of a new construction is covered with straw/gunny bags by wetting. This is done to:

  1. A.prevent fast evaporation, until hydration has proceeded well
  2. B.protect the concrete structure from contamination by dust particles
  3. C.prevent development of any fungus on the surface
  4. D.give smoother and cleaner surface over cement structure
Show answer
Correct answer: A. prevent fast evaporation, until hydration has proceeded well

Wet straw or gunny bags keep the fresh concrete moist, so water does not evaporate before the cement has hydrated properly.

Q5994.General ScienceAsked in: CDS · CDS-I 2026, GKMedium

Which one among the following statements regarding the electrical resistivity of a conducting wire is correct?

  1. A.The resistivity of the conductor increases if the length of the wire is increased.
  2. B.The resistivity of the conductor decreases if the length of the wire is increased.
  3. C.The resistivity of the conductor remains the same if the length of the wire is changed.
  4. D.The resistivity of the conductor increases if the cross-sectional area of the wire is increased.
Show answer
Correct answer: C. The resistivity of the conductor remains the same if the length of the wire is changed.

Resistivity is a property of the material itself, so it stays the same when the length of the wire is changed.

Q5996.GeographyAsked in: UPSC Civil Services · CSE Prelims 2019, GS Paper IEasy

On 21st June, the Sun

  1. A.does not set below the horizon at the Arctic Circle
  2. B.does not set below the horizon at Antarctic Circle
  3. C.shines vertically overhead at noon on the Equator
  4. D.shines vertically overhead at the Tropic of Capricorn
Show answer
Correct answer: A. does not set below the horizon at the Arctic Circle

21 June is the summer solstice of the Northern Hemisphere, when the North Pole is tilted towards the Sun and the whole Arctic Circle gets 24 hours of daylight.

Q5997.Science & TechnologyHard

Where was the CEA international conference cum exhibition on artificial intelligence in the power sector held?

  1. A.Bharat Mandapam, New Delhi
  2. B.Vigyan Bhawan, New Delhi
  3. C.Manekshaw Centre, New Delhi
  4. D.Yashobhoomi, Dwarka
Show answer
Correct answer: C. Manekshaw Centre, New Delhi

Bharat Mandapam, Vigyan Bhawan and Yashobhoomi are all genuine venues in or near the capital that host large national events, which makes them effective distractors, but none of them hosted this particular conference.

Q5999.Science & TechnologyMedium

Which portal was launched by the Central Electricity Authority during the inaugural session of the conference?

  1. A.Urja Mitra Portal
  2. B.Vidhyut Dwar Portal
  3. C.PRAAPTI Portal
  4. D.Saubhagya Portal
Show answer
Correct answer: B. Vidhyut Dwar Portal

Alongside the portal, the authority released the CEA Manual on Transmission Planning Criteria, 2026, and distributed the CEA Employee Awards for outstanding performance and exceptional contribution by its staff.

Q6000.Science & TechnologyEasy

What was the theme of the two-day international conference organised by the Central Electricity Authority?

  1. A.Making Indian Power Sector AI Enabled
  2. B.Clean Energy for a Viksit Bharat
  3. C.Grid of the Future: Storage and Flexibility
  4. D.Digital India for Rural Electrification
Show answer
Correct answer: A. Making Indian Power Sector AI Enabled

This was the declared theme under which the Central Electricity Authority held its international conference cum exhibition at the Manekshaw Centre in New Delhi, the first of its two days falling on 14 October 2026.

GK Questions for sub-exams