# Railway Engineering Questions and Answers – Sleeper Density and Spacing of Sleepers

This set of Railway Engineering Multiple Choice Questions & Answers (MCQs) focuses on “Sleeper Density and Spacing of Sleepers”.

1. The number of sleepers per rail length is called as _____
a) sleeper spacing
b) sleeper density
c) sleeper gravity

Explanation: The number of sleepers laid on the track per rail length is termed as sleeper density. Based on the sleeper density the spacing between sleepers is calculated. The maximum traffic on a route has an impact on its sleeper density.

2. What does ‘M’ represent in the sleeper density formula M + x?
a) Length of rail in metres
c) Length of sleepers
d) Type of route

Explanation: The sleeper density is represented by the formula M + x. Here ‘M’ is the length of rail and ‘x’ depends on various factors.

3. In the sleeper density formula M + x, x does not vary according to which of the following factors?
a) Type and section of rails
b) Type of ballast
c) The axle load of train
d) The slope of track

Explanation: X varies according to factors like axle load and speed, ballast cushion, strength of sleepers and type of rails.

4. Why the sleepers are closely spaced near the joints?
a) Because of weakness of joints
b) Because of coning of wheels
c) Because of tilting of rails
d) Because of more load at joints

Explanation: The joints are the weakest portion of the rail. Thus sleepers are more closely placed around them so that they do not fail.

5. Other than sleeper density how can the number of sleepers can be represented?
a) Number of sleepers per kilometre
b) Depending of the slope
c) Depending on the formation width
d) Width of sleepers per kilometre

Explanation: The number of sleepers on track can be specified by number of sleepers per kilometre of track. Example: 1400 sleepers/km.

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