# Civil Engineering - Railways

### Exercise :: Railways - Section 3

6.

Pick up the correct statement from the following:

 A. The line which connects a number of parallel tracks, and also provides an access to main track, is called a gathering line B. With a diagonal gathering line, the length of the siding decreases with increase of its distance from main track C. To have sidings of same length, a diagonal line is laid at one end and a parallel gathering line at the other end D. For most economical layout of yards, the gathering lines are laid at the limiting angle E. All the above.

Explanation:

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7.

If D is the distance between the parallel sidings and β is the limiting angle of crossings, the distance between the noses of crossing measured parallel to the main track, is

 A. D sin β B. D cot β C. D tan β D. D sec β

Explanation:

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8.

To avoid the damage of nose of crossing, the wing rails are ramped so that nose of crossing remains at a lower level by

 A. 3 mm B. 4 mm C. 5 mm D. 6 mm.

Explanation:

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9.

Smitch diamond is provided if the angle of diamond is less than

 A. 2° B. 4° C. 6° D. 8°

Explanation:

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10.

The distance between theoretical nose of crossing and actual nose of crossing for practical purposes, is

 A. Nose thickness x tan α B. Nose thickness x cot α C. Nose thickness x sin α D. Nose thickness x cos α