19. When typhoon Signal No. 3 is raised, classes in all levels are suspended and work in government offices are
likewise suspended. How strong is the typhoon?
A. It has a strong wind of 30 to 60 kph.
B. It has a strong wind of 60 to 100 kph.
C. It has a strong wind of 100 to 185 kph.
D. It has a very strong wind of more than 185 kph.
20. In order to determine the strength of typhoon, the PAGASA issues public storm warning signals. How are
they characterized the Public Storm Warning Signal No.1?
a. Winds moving at a speed of 220 kph or above may be expected in at least 12 hours. Winds
would bring widespread damage to high-risk structures.
b. Winds moving at a speed of 61-120 kph may be expected in at least 24 hours, the wind may bring
light to moderate damage to the affected communities.
C. Winds moving at a speed of 30-60 kph may be expected in at least 36 hours and only very light
or no damage at all may be sustained by the exposed communities.
d. Winds moving at a speed of 121-170 kph may be expected at least 18 hours and moderate to
heavy damage may be experienced particularly in the agricultural and industrial sectors.​