4-18.
In textbook fiqure 4-37, the compass
spread O’P is equal to what distance?
4-19.
4-20.
4-21.
1.
2.
3.
4.
In
OP
1.
2.
3.
4.
AB
The radius OP minus AB
The radius of arc EF minus AB
The radius OP minus the radius of
arc CD
textbook figure 4-38, the radius
is equal to what distance?
O’P
The
arc
The
arc
The
and
What is
line AB less the radius of
CD
line AB less the radius of
EF
sum of the radii of arcs CD
EF
the first step for
constructing a compound curve, as
shown in figure 4-40 of the textbook?
1.
Draw the chords connecting AB,
BC , CD, and DE
2.
Erect a perpendicular bisector
from A to B
3.
Establish the random distance O1A
4.
Draw arc AB
Assume that you just constructed the
ogee curve skown in figure 4-42 of
the textbook.
Which of the following
points was NOT established by
geometric construction?
1. C
2. D
3. E
4. O1
4-22.
When using the pin-and-string method
to construct an ellipse, which of the
following points should you use to
determine the length of the string
before drawing the perimeter of the
ellipse?
1.
Both end points of the minor axis
and one focus point
2.
Both end points of the major axis
and one focus point
3.
Both foci points and one end
point of the minor axis
4.
Both foci points and one end
point of the major axis
Figure 4A
IN ANSWERING QUESTIONS 4-23 AND 4-24, REFER
TO FIGURE 4A WHICH SHOWS THE CONSTRUCTION
LINES USED FOR DRAWING AN ELLIPSE BY THE
FOUR-CENTER METHOD.
4-23.
Line DE is equivalent to which of
the following lines or distances?
1.
Line DO
2.
Line KO
3.
Line AO minus line AK
4.
Line AO minus line DO
4-24.
Which of the following descriptions
describes point K correctly?
1.
The end point of line KO, which
is on the minor axis
2.
The intersection of line AO with
the perpendicular bisector of
line AE
3.
The intersection of line KO with
the perpendicular bisector of
line AD
4.
The end point of line KO, which
is equal to the difference in
lengths of lines AO and DO
24
