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Why are sleepers used below the rails?...

Why are sleepers used below the rails?

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Sleepers are laid down under the rails of train to increase area of contact with surface of the earth. This results in less pressure on the surface of the earth so that the surface may no yield.
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Knowledge Check

  • Assertion : Railways tracks are laid on small sized wooden sleepers. Reason : Small sized wooden sleepers are used so that rails exert more pressure on the railway track. Due to which rail does not leave the track

    A
    If both assertion and reason are true and the reason is the correct explanation of the assertion.
    B
    If both assertion and reason are true and the reason is not the correct explanation of the assertion.
    C
    If assertion ture but reason is false.
    D
    If the assertion and reason both are false.

  • The railway fares of air conditioned sleeper and ordinary sleeper class are in the ratio 4: 1 . The number of passengers travelled by air conditioned sleeper and ordinary sleeper classes were in the ratio 3 : 25 . If the total collection was Rs. 37,000, how much did air conditioner sleeper passengers pay ?

    A
    Rs. 15,000
    B
    Rs. 10,000
    C
    Rs. 12,000
    D
    Rs. 16,000

  • The radius of curvature of railway line at a place is 200 m. If the distance between the rail is 1.6 m and the outer rail is raised by 0.08 m above the inner rail .The speed of the train for which there is no side pressure on the rails (g=10 m//s^(2))

    A
    `5 m//s`
    B
    `10 m//s`
    C
    `15 m//s`
    D
    `20 m//s`

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    State whether the statement given below is true or false, giving reason in brief: "Two identical trains are moving on rails along the equator on the earth in opposite directions with the same speed. They will exert the same pressure on the rails"

    The radius of curvature of a railway line at a place when the train is moving with a speed of 36 kmh^(-1) is 1000 m, the distance between the two rails being 1.5 metre. Calculate the elevation of the outer rail above the inner rail so that there may be no side pressure on the rails.

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