10-46.
What is the value of the external
distance (E)?
1.
108.10 ft
2.
110.80 ft
3.
112.80 ft
4.
114.60 ft
10-47.
What is the value of the middle
ordinate (M)?
1.
75.95 ft
2.
82.55 ft
3.
89.85 ft
4.
95.95 ft
10-48.
HOW long is the long chord (LC)?
1.
716.20 ft
2.
718.20 ft
3.
720.10 ft
4.
722.10 ft
10-49.
What is the size of the deflection
angle you would use for a 50-foot
chord?
1.
1°30’
2.
2°00’
3.
2°30’
4.
3°00’
10-50.
With a chord length of 50 feet,
what is the distance from the PC
to the first point on the curve?
1.
11.10 ft
2.
25.40 ft
3.
38.90 ft
4.
50.00 ft
10-51.
The deflection angle used for
the distance above is
1.
1°30’
2.
1°33’
3.
1°35’
4.
1°45’
10-52.
What is the deflection angle, d2,
for the last subchord to the PC?
10-53.
The degree of curve and the
intersecting angle are both given
in degrees and minutes. Which of
the following actions should you
take during the computation to
maintain the degree of accuracy?
1.
Round off angles to the
nearest tenth of a degree
2.
Round off angles to the
nearest hundredths of a degree
3.
Convert angles to minutes for
computations
4.
Convert angles to seconds for
computations
10-54.
The first step in staking out a
simple curve is to set the
instrument up at what point?
1. PC
2. PI
3. PT
4.
Midpoint
10-55.
As a check during the stakeout of
a simple curve, the angle from the
PI to the PT is measured while the
instrument is still at the PC.
The angle should equal which of
the following values?
1.
One half of the central angle
2.
One half of the intersecting
angle
3.
The total of the deflection
angles
4.
Each of the above
10-56.
What is gained by using the
“backing-in” method of staking
out a horizontal curve?
1.
Fieldwork is accomplished much
faster
2.
Curve distortion is minimized
by applying the error at the
center of curve
3.
Fewer instrument setups are
needed
4.
Deflection angles can be
turned more accurately
1.
0°15’
2.
0°25’
3.
0°27’
4.
0°30’
71
