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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

Q3127.General ScienceAsked in: NDA · NDA-I 2019, GATMedium

Consider the following statements about a solenoid: 1. The magnetic field strength in a solenoid depends upon the number of turns per unit length in the solenoid 2. The magnetic field strength in a solenoid depends upon the current flowing in the wire of the solenoid 3. The magnetic field strength in a solenoid depends upon the diameter of the solenoid Which of the statements given above are correct?

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

The magnetic field inside a long solenoid is B = μ₀nI, where n is the number of turns per unit length and I is the current, so the field depends on these two and not on the diameter.

Q3128.General ScienceAsked in: NDA · NDA-II 2019, GATMedium

Which of the following are the characteristics of electromagnetic waves? 1. They are elastic waves. 2. They can also move in vacuum. 3. They have electric and magnetic components which are mutually perpendicular. 4. They move with a speed equal to 3 lakh meters per second. Select the correct answer using the code given below:

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

Electromagnetic waves need no medium, so they travel through vacuum, and they consist of electric and magnetic fields that oscillate at right angles to each other and to the direction of travel.

Q3130.General ScienceAsked in: NDA · NDA-I 2021, GATEasy

In a typical flower, germinating pollen grains pass through several parts of the gynoecium before they reach the ovule. A list of the parts of gynoecium is given below in different combinations. Choose the combination that represents the correct sequence of pollen tube pathway/journey:

  1. A.Style, Stigma, Ovary
  2. B.Stigma, Style, Ovary
  3. C.Pistil, Stigma, Ovary
  4. D.Ovary, Pistil, Style
Show answer
Correct answer: B. Stigma, Style, Ovary

A pollen grain lands on the stigma, grows a pollen tube that travels down through the style, and enters the ovary to reach an ovule, where fertilisation takes place.

Q3131.General ScienceAsked in: NDA · NDA-II 2022, GATEasy

A DC generator works on the principle of

  1. A.Ohm's law
  2. B.Joule's law of heating
  3. C.Faraday's laws of electromagnetic induction
  4. D.None of the above
Show answer
Correct answer: C. Faraday's laws of electromagnetic induction

A generator, whether AC or DC, produces electricity because a coil rotating in a magnetic field has a changing magnetic flux through it, and Faraday's laws say that a changing flux induces an electromotive force.

Q3133.General ScienceAsked in: NDA · NDA-I 2024, GATHard

Soap with water forms:

  1. A.Metallotropic liquid crystal
  2. B.Thermotropic liquid crystal
  3. C.Homogeneous solution
  4. D.Lyotropic liquid crystal
Show answer
Correct answer: D. Lyotropic liquid crystal

Soap in water forms a lyotropic liquid crystal, a phase whose ordered structure appears because of the amount of solvent mixed in, not because of temperature alone.

Q3134.Indian HistoryAsked in: NDA · NDA-II 2024, GATHard

Maize (makka) was introduced into India via

  1. A.America and England
  2. B.Africa and Spain
  3. C.France and Russia
  4. D.Portugal and Italy
Show answer
Correct answer: B. Africa and Spain

Maize is a crop of the Americas, and it reached India in the sixteenth and seventeenth centuries via Africa and Spain; by the seventeenth century it had become one of the major crops of western India.

Q3135.GeographyAsked in: NDA · NDA-I 2025, GATMedium

As per the Land Revenue Records, any land is categorized as Culturable Waste-Land if it is left fallow (uncultivated) for more than

  1. A.2 years
  2. B.3 years
  3. C.4 years
  4. D.5 years
Show answer
Correct answer: D. 5 years

In India's land-use classification, land that is left uncultivated for more than five agricultural years is recorded as culturable waste land, even though it could be brought back under cultivation with reclamation.

Q3136.General ScienceAsked in: NDA · NDA-II 2025, GATHard

Which one of the following is NOT present in cement?

  1. A.2CaO·SiO₂
  2. B.3CaO·SiO₂
  3. C.4CaO·SiO₂
  4. D.3CaO·Al₂O₃
Show answer
Correct answer: C. 4CaO·SiO₂

There is no compound with the formula 4CaO·SiO₂ in Portland cement; the four main compounds of cement clinker are dicalcium silicate, tricalcium silicate, tricalcium aluminate and tetracalcium aluminoferrite.

Q3138.General ScienceAsked in: NDA · NDA-II 2026, GATEasy

A flower typically is composed of:

  1. A.Stomata, Cotyledon, Petals, Sepals
  2. B.Carpels, Sepals, Petals, Cambium
  3. C.Carpels, Stamens, Petals, Sepals
  4. D.Petals, Sepals, Perianth, Root cap
Show answer
Correct answer: C. Carpels, Stamens, Petals, Sepals

A typical flower has four whorls arranged on the thalamus: sepals on the outside, then petals, then stamens, and carpels at the centre.

Q3139.General ScienceAsked in: NDA · NDA-II 2017, GATEasy

The mirrors used as rear-view mirrors in vehicles are

  1. A.concave
  2. B.convex
  3. C.cylindrical
  4. D.plane
Show answer
Correct answer: B. convex

A convex mirror always forms an erect, diminished image, so it shows a much wider area of the road behind than a flat mirror of the same size, which is why it is used as a rear-view or side-view mirror.

GK Questions for sub-exams