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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

Q41.General ScienceMedium

A force of 20 newton is applied at right angles to a rod at a point 0.5 metre from the axis of rotation. The torque about the axis is

  1. A.4 newton metre
  2. B.10 newton metre
  3. C.40 newton metre
  4. D.20.5 newton metre
Show answer
Correct answer: B. 10 newton metre

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.

Q42.General ScienceAsked in: Delhi · 27 June 2022, Shift 2Hard

The following statements (S1 and S2) pertain to principle of moments stated as Varignon theorem: S1: Theorem states that the Square of the moment of a Force is equal to the Sum of the Square moment of its components. S2: For applying Varignon Theorem, the force system may be either coplanar or spatial, but it must be concurrent. Identify the statements as True or False and choose the best answer.

  1. A.Both S1 and S2 are False
  2. B.Both S1 and S2 are True
  3. C.S1 is True and S 2 is False
  4. D.S1 is False and S 2 is True
Show answer
Correct answer: D. S1 is False and S 2 is True

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.

Q43.General ScienceMedium

A spinning skater pulls both arms close to the body and spins faster. This happens because

  1. A.The angular momentum of the skater increases
  2. B.The moment of inertia decreases, so the angular velocity increases
  3. C.The torque applied by the skater increases
  4. D.The mass of the skater decreases
Show answer
Correct answer: B. The moment of inertia decreases, so the angular velocity increases

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.

Q44.General ScienceHard

The centre of gravity of a uniform solid right circular cone of height h lies on its axis at a distance of

  1. A.h divided by 2 from the base
  2. B.h divided by 3 from the base
  3. C.h divided by 4 from the base
  4. D.3h divided by 4 from the base
Show answer
Correct answer: C. h divided by 4 from the base

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…

Q45.General ScienceMedium

A wheelbarrow is an example of which class of lever?

  1. A.First class
  2. B.Second class
  3. C.Third class
  4. D.It is not a lever
Show answer
Correct answer: B. Second class

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…

Q46.General ScienceMedium

When a body in stable equilibrium is slightly displaced, its centre of gravity

  1. A.Rises, and the body returns to its original position
  2. B.Falls, and the body moves further away
  3. C.Stays at the same height
  4. D.Shifts outside the body
Show answer
Correct answer: A. Rises, and the body returns to its original position

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.

Q47.General ScienceMedium

A rigid body is said to be in complete mechanical equilibrium when

  1. A.The net force on it is zero
  2. B.The net torque on it is zero
  3. C.Both the net force and the net torque on it are zero
  4. D.Its centre of gravity lies at its geometrical centre
Show answer
Correct answer: C. Both the net force and the net torque on it are zero

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.

Q48.General ScienceEasy

A long spanner loosens a tight nut more easily than a short one because it

  1. A.Reduces the force needed by increasing the moment arm
  2. B.Reduces the friction at the nut
  3. C.Increases the mass acting on the nut
  4. D.Changes the direction of the weight of the nut
Show answer
Correct answer: A. Reduces the force needed by increasing the moment arm

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.

Q50.General ScienceEasy

The centre of gravity of a uniform circular ring lies

  1. A.On the ring itself, at any point
  2. B.At the centre of the ring, outside its material
  3. C.At one third of the radius from the centre
  4. D.Nowhere, because a ring has no centre of gravity
Show answer
Correct answer: B. At the centre of the ring, outside its material

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.

Q51.General ScienceAsked in: RRB JE · 29 Aug 2019Hard

Three forces acting on a rigid body are represented in magnitude, direction and line of action by the three sides of a triangle taken in order. The forces are equivalent to a couple whose moment is equal to

  1. A.Thrice the area of the triangle
  2. B.Twice the area of the triangle
  3. C.The area of the triangle
  4. D.Half the area of the triangle
Show answer
Correct answer: B. Twice the area of the triangle

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.

Q52.General ScienceEasy

What is the SI unit of torque?

  1. A.Newton
  2. B.Newton metre
  3. C.Newton per metre
  4. D.Joule per second
Show answer
Correct answer: B. Newton metre

Torque is the product of a force and the perpendicular distance of its line of action from the axis of rotation, so its unit is the unit of force multiplied by the unit of length, the newton metre, and its dimensional formula is M L squared T to the power…

Q53.General ScienceMedium

The breaking stress of a wire depends upon

  1. A.The length of the wire
  2. B.The radius of the wire
  3. C.The material of the wire
  4. D.The shape of the cross-section
Show answer
Correct answer: C. The material of the wire

Breaking stress is the greatest force per unit area that a substance can bear before it snaps, and since both the force and the area are already accounted for in the definition, what remains is a constant of the substance itself, the same for a thin wire and a thick…

Q54.General ScienceAsked in: Uttar Pradesh · UPSSSC JE Mechanical 2015 PaperHard

A composite bar is made of steel and aluminium strips each having 3 square centimetre area of cross-section. The composite bar is subjected to an axial load of 12000 newton. If the Young's modulus of steel is three times that of aluminium, the stress in steel is

  1. A.10 newton per square millimetre
  2. B.20 newton per square millimetre
  3. C.30 newton per square millimetre
  4. D.None of the above
Show answer
Correct answer: C. 30 newton per square millimetre

The two strips are joined and carry the load together, so they suffer the same strain. Since stress equals the modulus multiplied by the strain, the stress in steel is three times the stress in aluminium.

Q55.General ScienceAsked in: Delhi · 27 Sept 2018, Shift 2Hard

A spring of spring constant k is suspended from the roof and a block of mass m is suspended at the other end of the spring. The block is suddenly released. Find the maximum elongation produced in the spring.

  1. A.2mg divided by k
  2. B.mg divided by 2k
  3. C.mg divided by k
  4. D.mg divided by 4k
Show answer
Correct answer: A. 2mg divided by k

When the block is released suddenly it falls freely at first, so at the lowest point its speed is zero and all the gravitational potential energy it has lost has gone into the spring.

Q57.General ScienceHard

The elastic potential energy stored per unit volume of a stretched wire is equal to

  1. A.Stress multiplied by strain
  2. B.One half multiplied by stress multiplied by strain
  3. C.Stress divided by strain
  4. D.Two multiplied by stress multiplied by strain
Show answer
Correct answer: B. One half multiplied by stress multiplied by strain

The restoring force grows from zero to its final value as the wire is stretched, so the work done is the average force multiplied by the extension, and dividing by the volume of the wire leaves half the product of stress and strain as the energy stored in each unit…

Q58.General ScienceMedium

Poisson's ratio of a material is defined as the ratio of

  1. A.Stress to strain
  2. B.Lateral strain to longitudinal strain
  3. C.Longitudinal strain to lateral strain
  4. D.Shear stress to shear strain
Show answer
Correct answer: B. Lateral strain to longitudinal strain

When a wire is pulled it lengthens and at the same time grows thinner, and Poisson's ratio records how large the sideways contraction is compared with the lengthwise extension; it is a pure number, with theoretical limits of minus one and one half and practical values of about 0.2 to…

Q59.General ScienceEasy

Which of the following statements about steel and rubber is correct in physics?

  1. A.Rubber is more elastic because it stretches more
  2. B.Steel is more elastic because its modulus of elasticity is much larger
  3. C.Both have equal elasticity
  4. D.Neither is elastic, since both are solids
Show answer
Correct answer: B. Steel is more elastic because its modulus of elasticity is much larger

Elasticity in physics is not the ability to stretch far but the strength of the restoring tendency, measured by the stress needed to produce a given strain, and steel demands an enormously greater stress than rubber for the same fractional extension.