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.

Answer: Option E

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

Answer: Option B

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.

Answer: Option A

Explanation:

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9. 

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

A.
B.
C.
D.

Answer: Option C

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

Answer: Option B

Explanation:

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