A scissors cross-over consists of two pairs of points, four acute angle crossing

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Question
A scissors cross-over consists of
Options
A. two pairs of points, four acute angle crossings and two obtuse angle crossings
B. four pairs of points, four acute angle crossings and four obtuse angle crossings
C. four pairs of points, six acute angle crossings and two obtuse angle crossings
D. two pairs of points, six acute angle crossings and four obtuse angle crossings.

Correct Answer

four pairs of points, six acute angle crossings and two obtuse angle crossings

Railways problems

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1. On a straight railway track, absolute levels at point A on two rails are 100.550 m and 100.530 m and the absolute levels at point B 100 m apart are 100.585 m and 100.515 m respectively, the value of twist of rails per metre run, is
Options
A. 0.4 mm
B. 0.5 mm
C. 0.7 mm
D. 0.8 mm
E. 1.0 mm

2. To design a cross-over between parallel tracks, the required components are :
Options
A. two switch, points, two acute angle crossings and two check rails
B. two switch points, two acute angle crossings and four check rails
C. two switch points, two acute angle crossings and six check rails
D. none of these.

7. Pick up the incorrect statement from the following:
Options
A. Fish plates fit the underside of the rail head
B. Fish plates fit the top of the rail foot
C. Fish plates fit the web of the rail section
D. Cross sectional area of fish plates, is normally the same as that of the rail section.

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