Weight
8.
Railway curves are needed to change the direction of rail lines. It is true of such curvature
that:
2
a. A throw on a curve at a restricted clearance must be limited to +3.
2
b. If a curve is installed on a grade, it increases the capabilities of locomotives.
2
c. Grade reduction on curves should be planned by engineers.
2
d. The sharper a curve is, the more resistance to movement a locomotive will have.
2
e. When a curve is out of line, its superelevation is unaffected.
9.
A spiraled curve is built between a tangent and a circular curve. Of spiraled curves, it is
true that they:
3
a. Are called easements because of their function.
3
b. Provide correct superelevation needed without suddenly altering the track's banking.
3
c. Differ from circular curves in that their curvature is constant throughout their length.
3
d. Become sharper where they join tangents.
3
e. Can be designed by most section foremen.
10. Several abbreviations are helpful to the stringlining crew when recording data and marking
points in the field. Match the meanings of the abbreviations listed in column II with the
abbreviations given in column I.
Choices in column II may be used once, more than once, or not at all.
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