航海英语海上天气现象章节练习(2017.11.06)

单项选择题
A strong，often violent，northerly wind occurring on the Pacific coast of Mexico，particularly during the colder months，is called（）.
A.Tehuan tepecer
B.Papagayo
C.Norther
D.Pampero
单项选择题
A（）is created by a pressure gradient or slope in the water level.
A.gradient current
B.density current
C.swift current
D.torrent current
单项选择题
An anemometer on a moving vessel measures（）.
A.apparent wind speed only
B.true wind speed and true wind direction
C.true wind speed only
D.apparent wind speed and true wind direction
单项选择题
Cumulus clouds that have undergone vertical development and have become cumulonimbus in form，indicate（）.
A.clearing weather
B.that a warm front has passed
C.probable thunderstorm activity
D.an approaching hurricane or typhoon
单项选择题
In North America the majority of the weather systems move from（）.
A.north to south
B.south to north
C.east to west
D.west to east
单项选择题
Which type of precipitation is a product of the violent convection found in thunderstorms（）.
A.Snow
B.Freezing Rain
C.Hail
D.Sleet
单项选择题
Cumulonimbus clouds are formed by（）.
A.vertical air movements
B.heavy rainstorms
C.horizontal air movements
D.any movement of moist air
单项选择题
Fetch is the（）.
A.Distance a wave travels between formation and decay
B.Stretch of water over which a wave-forming wind blows
C.Time in seconds required for two crests to pass a given point
D.Measurement of a wave's steepness
单项选择题
What kind of conditions would you observe as the eye of a storm passes over your ship’s position（）.
A.Huge waves approaching from all directions，clearing skies，light winds，and an extremely low barometer
B.Flat calm seas，heavy rain，light winds，and an extremely low barometer
C.Flat calm seas，heavy rain，light winds，and high pressure
D.Huge waves approaching from all directions，clearing skies，light winds，and high pressure
单项选择题
A hurricane moving northeast out of the Gulf passes west of your position. You could expect all of the following EXCEPT（）.
A.higher than normal swells
B.high winds
C.winds veering from south，through west，to northwest
D.light showers