DWO Weather Assessment 2

Question 1

A rapidly falling barometer of more than 1 mb per hour over several hours most likely indicates:

Accepted Answer

An approaching storm system

Answer

Stable high pressure approaching

Answer

Fair weather for the next 24 hours

Answer

A stationary front overhead

Question 2

On a weather map, isobars that are closely spaced together indicate:

Accepted Answer

Strong pressure gradient and high winds

Answer

Calm winds and light breezes

Answer

Warm air aloft and fog risk

Answer

A stationary air mass

Question 3

What type of fog commonly forms when warm, moist air moves over a cold ocean current?

Accepted Answer

Advection fog

Answer

Radiation fog

Answer

Frontal fog

Answer

Steam fog

Question 4

In the Northern Hemisphere, standing with the wind at your back, low pressure is located approximately:

Accepted Answer

To your left and slightly ahead

Answer

Directly behind you

Answer

To your right and slightly behind

Answer

Directly in front of you

Question 5

A vessel officer observes a halo around the moon at night. This is most commonly associated with:

Accepted Answer

Approaching precipitation within 24-48 hours

Answer

Clear and stable weather

Answer

Immediate thunderstorm threat

Answer

Dense fog by morning

Question 6

Which wind scale is standard for reporting wind speed in maritime surface weather observations?

Accepted Answer

Beaufort scale

Answer

Saffir-Simpson scale

Answer

Fujita scale

Answer

Enhanced Fujita scale

Question 7

What is the primary danger to vessels associated with a temperature inversion in the lower atmosphere?

Accepted Answer

Reduced visibility due to fog or haze

Answer

Extreme lightning activity

Answer

Formation of waterspouts

Answer

Sudden wind shifts exceeding 45 knots