航海英语(甲类船长)航海气象单选题练习1

You are located within a stationary high pressure area．Your aneroid barometer is falling very slowly．This indicates a（n）______．

The wind flow from the horse latitudes to the doldrums is deflected due to ______．

The velocity of the apparent wind can be more than the true wind，and come from the same direction，if certain conditions are present．One condition is that the ______．

The horse latitudes are characterized by ______．

The surface currents of the South Atlantic，South Pacific and South Indian Ocean follow，in general，a regular pattern of ______．

The general circulation of the surface water in Mediterranean is ______．

The“horse latitudes” regions of ______．

On the pole side of the trade wind belt，there is an area of high pressure with weak pressure gradients and light，variable winds．This area is called the ______．

In polar regions you should NOT expect to see ______．

Gradient currents caused indirectly ______．

Which type of precipitation is a product of the violent convection found in thunderstorms ________．

A pattern that at the crest the motion of each particle is forward and at the trough it is backward relative to the wave's motion is ______．

Which of the following is not a wind ________．

When experiencing heavy winds，you should reef sails to ______．

What kind of pressure systems travel in easterly waves ________．

When a hurricane passes over colder water or land and loses its tropical characteristics，the storm becomes a（n）______．

When a hurricane passes into high latitudes over colder water and the source of heat is disrupted，the storm assumes the characteristics of ______．

Tropical cyclones are classified by form and intensity．Which system does not have closed isobars ________．

What is the first visible indication of the presence of a tropical cyclone or hurricane ________．

The moisture equilibrium chart can be used to determine the ______．

The direction of prevailing winds in the Northern hemisphere is caused by the ______．

The force resulting from the earth's rotation that causes winds to deflect to the right in the Northern Hemisphere and to the left in the Southern Hemisphere is called ______．

Haze is not caused by ______．

Hurricanes may move in any direction．However，it is rare and generally of short duration when a hurricane in the Northern Hemisphere moves toward the ______．

If you observe the point of cloud convergence shifting to the right and the “bar”of the storm appears to move along the horizon ______．

Cumulus clouds that have undergone vertical development and have become cumulonimbus in form，indicate ______．

Clouds with the prefix“nimbo”in their name ______．

A ______ is created by a pressure gradient or slope in the water level．

______ is a type of fog occurring close to the sea surface when the air is dry and cold-probably at least 9℃ below the sea surface temperature．

______ are experienced in temperate latitudes during warm summer weather but rarely exceed Force 3 and may extend 10 to 15 miles on either side of the coastline．

______ blow more or less constantly（except when monsoons prevail）throughout all seasons at a mean speed of around 14 knots and are generally strongest in the late winter．

______ forms over land，most frequently during autumn and winter over low-lying land，especially if it is damp and marshy and in valleys on quiet nights with clear skies．

Which of the following statements concerning frontal movements is TRUE ________．

Widely spaced isobars on a weather map indicate ______．

When steering on autopilot which of the following input conditions may NOT have an effect on the control of the steering gear ________．

When a high pressure system is centered north of your vessel in the Northern Hemisphere ______．

Which general weather conditions should you expect to find in a low pressure system ________．

West backing south-west gale 8 locally storm 10 ______ then rain or sleet mainly good．

What benefit is a weather bulletin to a mariner ________．

Weather observations provided by each weather station include all of the following except ______．

Weather information is available from ______．

Weather conditions in the middle latitudes generally move ______．

The dense black cumulonimbus clouds surrounding the eye of a hurricane are called ______．

The area of strong westerly winds occurring between 40°S and 60°S latitude is called the ______．

The apparent wind's speed can be zero，but only when two conditions are present．One condition is that the true wind ______．

TAIWAN STRAITS EAST GUANGDONG：CLOUDY TO OVERCAST WITH LOCAL SHOWERS WIND NE 22 TO 33 KTS SEAS ROUGH TO VERY ROUGH VIS 10 TO 20 KMS．The Vis. in this area is ______ nautical miles．

HIGH WAVES；DENSE STREAKS OF FOAM ALONG THE DIRECTION OF THE WIND；CRESTS OF WAVES BEGIN TO TOPPLE，TUMBLE AND ROLL OVER；SPRAY MAY AFFECT VISIBILITY．This condition is likely to be termed ______．

SCARBOROUGH= W TO SW UP TO 10 IN N．500 M IN HVY SQUALLY SHOWERS AND TS．SEA 7-8 M．SWELL SW 5-6 M．The visibility in this area is ______．

Anticyclones are usually characterized by ______．

A type of precipitation that occurs only in thunderstorms with strong convection currents that convey raindrops above and below the freezing level is known as ______．

A tropical storm is building strength some distance from your ship．Waves are coming from the east，with periods increasing from 5 seconds to 15 seconds．The swell is from the east．Where was the storm when these new swells were generated ________．

A microbarograph is a precision instrument that provides a ______．

______ LOW ELY SLWLY WITH COLD FRONT FM CEN TO 12N 179W AND WARM FROM FM CEN TO 11N 171W．