Learning Objective: Recognize
terms associated with vertical
curves; identify types and
elements of vertical curves.
10-57.
What is a vertical curve at the
bottom of a hill?
1.
Summit curve
2.
Oververtical curve
3.
Sag curve
4.
Compound curve
10-58.
A constant slope between curves
is known by what term?
1.
Grade
2.
Grade tangents
3.
Gradient
4.
Each of the above
10-59.
Vertical curves are usually
what shape?
1.
Parabolic
2.
Circular
3.
Elliptical
4.
Hyperbolic
10-60.
In a vertical curve system, the
point of vertical tangency is
located at what point?
1.
Where the curve begins
2.
Where the curve ends
3.
Where the grade tangents
intersect
4.
At any point on the tangent
10-61.
Vertical curves are used at
locations other than the top
or bottom of a hill.
Learning Objective: Recognize
and use the fundamental principles
of symmetrical and unsymmetrical
curve computation; recognize basic
procedures associated with check-
ing computation by plotting, using
a profile work sheet, and making a
field stakeout of vertical curves.
10-62.
What factor makes a curve
symmetrical?
1.
g1 equals g2
2.
11 equals 12
3.
Both 2 and 3 above
4.
G equals zero
10-63.
Usually , the PVC and PVT are
designed to be set at what
location along the survey?
1.
At full stations or half
stations
2.
At 25-foot intervals
3.
Points on the same parabola
4.
Any of the above
10-64.
Given a PVC elevation of 100 ft, a
first slope of +4%, a second slope
of +2%, and L = 400 ft. On a
symmetrical curve, what is the
elevation of the PVT?
1.
107 ft
2.
112 ft
3.
116 ft
4.
120 ft
10-65.
Given a PVC elevation of 100 ft, a
first slope of+ 4%, a second slope
of +2%, and L = 400 ft. What is
the value of the middle vertical
offset?
1.
True
2.
False
1.
-0.5 ft
2.
-1.0 ft
3.
-1.5 ft
4.
-2.0 ft
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