(Each question of this kind consists of a series of statements related to the stem that
precedes them. Indicate which are true and which false with respect to the stem. )
Put a "T" for true and an "F" for false.
A spiraled curve is so designed that:
a. Its length depends on the superelevation of the circular curve.
b. In a theater, a newly constructed railway curve of 2 degrees or less should not include
c. A short one can be approached safely by a high-speed train.
d. The increased superelevation to which the train is subjected per second is considered.
e. A curve with the greatest superelevation will need the shortest spiral.
Highway engineers bank a curve to compensate for inertia; railway engineers use
superelevation. Of the following, which is true and which is false of superelevation?
a. It is more of a problem on single track than on double track.
b. Four inches should be the maximum ever used on a military railroad.
c. If the maximum is used and is insufficient for expected speeds, speed limits have to be
d. When a train rounds a curve at the correct speed for the equilibrium superelevation, the
wheels should bear evenly on the high and low rails.
e. When the correct speed for the equilibrium superelevation is exceeded, a greater force
bears on the high rail.