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RRB JE GK Questions 2026

Static GK makes up most of the General Awareness syllabus of RRB JE, and General Science adds a larger block of its own. CEN 04/2026 lists Indian geography, the culture and history of India including the freedom struggle, Indian Polity and Constitution, the Indian Economy and environmental issues concerning India and the world. In CBT-1 these share 15 questions with current affairs, while General Science, which the CEN defines as Physics, Chemistry and Life Sciences up to the 10th Standard CBSE syllabus, has 30 questions of its own. CBT-2 repeats the General Awareness syllabus in 15 questions and adds 15 on Physics and Chemistry, 10 on Basics of Computers and Applications and 10 on Basics of Environment and Pollution Control. This page holds GK24's topic-wise GK notes for RRB JE: Polity, History, Geography, the Economy, Art and Culture, Environment and Ecology, General Science and Computer basics. Each note is a set of short facts and tables in English and Hindi that can be revised in one sitting. Read one topic, solve its quiz and previous-year questions, and return to it a week later. With 15 General Awareness questions spread over eight areas, breadth matters more than depth, while General Science rewards thorough revision of Class 10 concepts.

RRB JE GK Questions with Answers

Q101.DefenceMedium

At which event was the IAF Unmanned and Autonomous Systems Roadmap released?

  1. A.Aero India 2026 at Bengaluru
  2. B.IAF Dronathon 2026 at Pokhran
  3. C.DefExpo 2026 at Gandhinagar
  4. D.Exercise Vayu Shakti at Jaisalmer
Show answer
Correct answer: B. IAF Dronathon 2026 at Pokhran

The roadmap was released there on 14 September 2026, and the Industry Outreach Programme of 21 October 2026 at Vigyan Bhawan in New Delhi was built on it, with the roadmap booklet distributed to industry partners on that day.

Q102.General ScienceAsked in: CDS · CDS-II 2016, GKMedium

In a bipolar junction transistor

  1. A.all the three regions (the emitter, the base and the collector) have equal concentrations of impurity
  2. B.the emitter has the least concentration of impurity
  3. C.the collector has the least concentration of impurity
  4. D.the base has the least concentration of impurity
Show answer
Correct answer: D. the base has the least concentration of impurity

The base is made thin and lightly doped so that most charge carriers from the emitter cross it to the collector.

Q103.SportsMedium

In which event did Ravi K. Budigina win a silver medal at the Asian Para Games 2026?

  1. A.Men's 100m freestyle S13 swimming
  2. B.Men's 100m sprint T13 athletics
  3. C.Men's javelin throw F46
  4. D.Men's long jump T47
Show answer
Correct answer: A. Men's 100m freestyle S13 swimming

Ravi K. Budigina was the runner-up in that race at the Asian Para Games 2026, and the Prime Minister called his determination, hard work and sporting spirit commendable, described the achievement as a proud moment for the nation and wished him continued success in the times ahead.

Q108.NationalMedium

What are the route length and the cost of the USBRL project?

  1. A.272 km at Rs 43,780 crore
  2. B.119 km at Rs 6,808 crore
  3. C.216 km at Rs 2,700 crore
  4. D.190 km at Rs 1,677 crore
Show answer
Correct answer: A. 272 km at Rs 43,780 crore

That is the length and the cost of the Udhampur–Srinagar–Baramulla Rail Link, which was inaugurated in June 2025 and spreads over the districts of Udhampur, Reasi, Ramban, Srinagar, Anantnag, Pulwama, Budgam and Baramulla.

Q110.General ScienceHard

Which gas combines with haemoglobin to form carboxyhaemoglobin, making it unable to carry oxygen?

  1. A.Carbon dioxide
  2. B.Carbon monoxide
  3. C.Sulphur dioxide
  4. D.Nitrous oxide
Show answer
Correct answer: B. Carbon monoxide

Carbon monoxide binds to haemoglobin far more strongly than oxygen does and forms carboxyhaemoglobin, so the blood cannot pick up oxygen even though breathing goes on; the gas is colourless and odourless, which makes it the more dangerous, and it is produced by the incomplete burning of fuel in closed…

Q112.General ScienceMedium

The Haber process is used for the manufacture of which gas?

  1. A.Chlorine
  2. B.Ammonia
  3. C.Sulphur dioxide
  4. D.Ethylene
Show answer
Correct answer: B. Ammonia

In the Haber process nitrogen from the air and hydrogen are combined under high pressure at a few hundred degrees Celsius over a catalyst of finely divided iron, and the ammonia so made is the starting point of nitrogenous fertilisers such as urea and of nitric acid.

Q113.General ScienceEasy

Lime water turns milky when which gas is passed through it?

  1. A.Hydrogen
  2. B.Oxygen
  3. C.Carbon dioxide
  4. D.Nitrogen
Show answer
Correct answer: C. Carbon dioxide

Carbon dioxide reacts with lime water, a solution of calcium hydroxide, to form insoluble calcium carbonate, whose fine white particles make the liquid look milky; if more of the gas is passed the milkiness disappears as soluble calcium bicarbonate is formed, and that second step is often the harder half…

Q116.General ScienceEasy

Which gas is commonly known as laughing gas?

  1. A.Nitric oxide
  2. B.Nitrogen dioxide
  3. C.Nitrous oxide
  4. D.Ammonia
Show answer
Correct answer: C. Nitrous oxide

It is called laughing gas because it produces a feeling of elation when inhaled in small quantities, and it is used as a mild anaesthetic in dentistry and minor surgery and as the propellant in whipped cream; it is also a greenhouse gas.

Q117.General ScienceAsked in: SSC GD Constable · 18 Feb 2019, Shift 2Medium

Ozone depletion is greatest near

  1. A.tropics
  2. B.equator
  3. C.poles
  4. D.oceans
Show answer
Correct answer: C. poles

Chlorine released from chlorofluorocarbons destroys ozone fastest where polar stratospheric clouds form in the extreme cold of winter, because those ice clouds hold the chlorine compounds that sunlight then breaks up; the thinning is therefore deepest over Antarctica, where it is called the ozone hole, and is seen over the…

Q118.General ScienceAsked in: SSC CPO · 10 Nov 2022, Shift 2Medium

Which of the following is a radioisotope of hydrogen?

  1. A.Xenon
  2. B.Technetium
  3. C.Thorium
  4. D.Tritium
Show answer
Correct answer: D. Tritium

Hydrogen has three isotopes: protium with one proton and no neutron, deuterium with one neutron, which gives heavy water, and tritium with two neutrons, which is radioactive and is used in fusion research and in luminous dials.

Q119.General ScienceAsked in: RRB JE · 25 May 2019, Shift 1Easy

Which gas is typically produced when a metal reacts with an acid?

  1. A.Carbon dioxide
  2. B.Oxygen
  3. C.Hydrogen
  4. D.Nitrogen
Show answer
Correct answer: C. Hydrogen

A metal more reactive than hydrogen displaces it from a dilute acid, so zinc with dilute sulphuric acid gives zinc sulphate and hydrogen gas, and this is the standard laboratory preparation of the gas; the test is that it burns with a pop.

Q120.General ScienceAsked in: NDA · NDA-II 2019, GATMedium

If the work done on the system or by the system is zero, which one of the following statements for a gas kept at a certain temperature is correct?

  1. A.Change in internal energy of the system is equal to flow of heat in or out of the system.
  2. B.Change in internal energy of the system is less than heat transferred.
  3. C.Change in internal energy of the system is more than the heat flow.
  4. D.Cannot be determined.
Show answer
Correct answer: A. Change in internal energy of the system is equal to flow of heat in or out of the system.

With no work done, the first law of thermodynamics reduces to ΔU = Q, so the change in internal energy equals the heat that flows in or out.