In the 2024 Indian Railways modernization, what is the primary objective of the 'Gati Shakti' program?

The correct answer is B: To develop integrated transport infrastructure for faster movement of goods and passengers. Gati Shakti is a national master plan to develop integrated multimodal infrastructure for economic growth and faster movement of goods and passengers.

What is the primary reason for providing 'expansion joints' in railway tracks?

The correct answer is B: To allow for thermal expansion and contraction of rails due to temperature changes. Expansion joints accommodate the linear expansion of rails in hot weather and contraction in cold weather, preventing rail buckling or breaking.

Which type of rail joint is most commonly used in modern Indian railways?

The correct answer is B: Welded joint. Welded joints (including Continuous Welded Rail or CWR) are preferred in modern railways as they reduce vibration and wear.

According to Newton's third law of motion, for every action there is:

The correct answer is A: An equal and opposite reaction. Newton's third law states that for every action, there is an equal and opposite reaction. This means forces always act in pairs - if object A exerts a force on object B, then B exerts an equal force on A in the opposite direction.