4-18.
When two sets of history are placed on a
chart, which of the following colors are
used for (a) the oldest history and (b) the
most recent history?
1. (a) Yellow,
(b) orange
2. (a) Black,
(b) yellow
3. (a) Orange,
(b) yellow
4. (a) Yellow,
(b) black
Figure 4-A
IN ANSWERING QUESTIONS 4-19 THROUGH
4-22, REFER TO FIGURE 4-A. RESPONSES ARE
USED ONLY ONCE.
4-19.
What symbol is used to depict the axis of a
trough?
1. A
2. B
3. C
4.
D
4-20.
What symbol depicts a cold front at the
surface?
1. A
2. B
3. C
4.
D
4-21.
What symbol depicts an occluded front at
the surface?
1. A
2. B
3. C
4. D
4-22.
What symbol depicts a warm front at the
surface?
1. A
2. B
3. C
4. D
4-23.
What color is used to indicate a convergent
asymptote on a streamline chart?
1 . Blue
2. Black
3. Orange
4. Red
4-24.
What symbol is used to show moderate
clear air turbulence?
30
