C. Proper lining is determined by a method called stringlining.
D. Train traffic is unaffected by curved track alinement.
22. The sum of the proposed ordinates must equal:
The number of stations measured.
The sum of the measured ordinates.
The number of doglegs.
The number of easement curves.
23. Actual track throws should be kept as small as possible because:
Large ones allow more room for error.
They result in less rail wear.
They increase riding comfort.
Short throws are physically easier to make.
A portion of a spiraled curve is shown in the
diagram at the right. Note that the stations are
indicated by letters rather than by consecutive
Answer the next four multiple-choice
questions on the basis of the diagram.
24. If the ordinate at point C measures 1 1/2
inches, you would record it in your logbook