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______ 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．
A.MIXING FOG
B.ADVECTION FOG
C.RADIATION FOG
D.ARCTIC SEA SMOKE
参考答案
更多 “ ______ 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．A.MIXING FOGB.ADVECTION FOGC.RADIATION FOGD.ARCTIC SEA SMOKE ” 相关考题
考题
Steam smoke will occur when ______.A.extremely cold air from shore passes over warmer waterB.warm dry air from shore passes over cooler waterC.cold ocean water evaporates into warm airD.cool rain passes through a warm air mass
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The fog most commonly encountered at sea is called ______.A.conduction fogB.radiation fogC.frontal fogD.advection fog
考题
Advection fog may be formed by cold air passing over a ______.A.colder sea surfaceB.warmer sea surfaceC.dry coastal plainsD.high mountain or plateau
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When hugging a bank in a narrow channel，you should take precautions against ______．A.Bank suction，squat and the effects of vessels passing close aboardB.Clogged sea chests，plugged sea strainers and overheated machineryC.Striking underwater obstructions close to the bankD.All of the above
考题
Advection fog is most commonly caused by ______.A.air being warmed above the dew pointB.saturation of cold air by rainC.a rapid cooling of the air near the surface of the Earth at nightD.warm moist air being blown over a colder surface
考题
Fog is likely to occur when there is little difference between the dew point and the ______.A.relative humidityB.air temperatureC.barometric pressureD.absolute humidity
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共用题干
第二篇Hurricane（咫风）KatrinaA hurricane is a fiercely powertul , rotating（旋转的）form of tropical storm that can be 124 to 1,240 miles in diameter. The term hurricane is derived from Hurican,the name of a native American storm god.Hurricanes are typical of a calm central region of low pressure between 12 to 60 miles in diameter,known as the eye.They occur in tropical regions. Over its lifetime,one of these storms can release as much energy as 10,000 nuclear bombs.The seed for hurricane formation is a cluster（聚集）of thunderstorms over warm tropical waters.Hurricanes can only form and be fed when the sea-surface temperature exceeds 27℃ and the surrounding atmosphere is calm.These requirements are metbetween June and November in the northern part of the world.Under these conditions, large quantities of water evaporate（蒸发）and condense（冷凝）into clouds and rain-releasing heat in the process.It is this heat energy,combined with the rotation of the Earth,that drives a hurricane.When the warm column of air from the sea surface first begins to rise,it causes an area of low pressure.This in turn creates wind as air is drawn into the area.This spinning wind drags up more moist air from the sea surface in a process that strengthens the storm.Cold air falls back to the ocean surface through the eye and on the outside of the storm.Initially,when wind speeds reach 23 miles per hour,these mild,wet and grey weather systems are known as depressions,or low air pressure.Hurricane Katrina formed in this way over the south-eastern Bahamas on 23 August 2005.Katrina has had a devastating impact on the Gulf Coast of the US,leaving a disaster zone of 90,000 square miles in its wake（尾迹）一almost the size of the UK. Thousands have been killed or injured and more than half a million people have become homeless in a humanitarian（人道主义的）crisis of a scale not seen in the US since the Great Depression.The cost of the damage may top $100 billion.When the warm air from the sea surface begins to rise,itA:creates an area of low pressure.B:supplies cold air to the eye of a hurricane.C:increases the sea-surface temperature.D:strengthens the rotation of the earth.
考题
共用题干
第二篇Hurricane（咫风）KatrinaA hurricane is a fiercely powertul , rotating（旋转的）form of tropical storm that can be 124 to 1,240 miles in diameter. The term hurricane is derived from Hurican,the name of a native American storm god.Hurricanes are typical of a calm central region of low pressure between 12 to 60 miles in diameter,known as the eye.They occur in tropical regions. Over its lifetime,one of these storms can release as much energy as 10,000 nuclear bombs.The seed for hurricane formation is a cluster（聚集）of thunderstorms over warm tropical waters.Hurricanes can only form and be fed when the sea-surface temperature exceeds 27℃ and the surrounding atmosphere is calm.These requirements are metbetween June and November in the northern part of the world.Under these conditions, large quantities of water evaporate（蒸发）and condense（冷凝）into clouds and rain-releasing heat in the process.It is this heat energy,combined with the rotation of the Earth,that drives a hurricane.When the warm column of air from the sea surface first begins to rise,it causes an area of low pressure.This in turn creates wind as air is drawn into the area.This spinning wind drags up more moist air from the sea surface in a process that strengthens the storm.Cold air falls back to the ocean surface through the eye and on the outside of the storm.Initially,when wind speeds reach 23 miles per hour,these mild,wet and grey weather systems are known as depressions,or low air pressure.Hurricane Katrina formed in this way over the south-eastern Bahamas on 23 August 2005.Katrina has had a devastating impact on the Gulf Coast of the US,leaving a disaster zone of 90,000 square miles in its wake（尾迹）一almost the size of the UK. Thousands have been killed or injured and more than half a million people have become homeless in a humanitarian（人道主义的）crisis of a scale not seen in the US since the Great Depression.The cost of the damage may top $100 billion.Which of the following is NOT a"requirement"for the formation of a hurricane?A:Calm surrounding atmosphere.B:High air pressure.C:Warm sea-surface temperature.D:A group of thunderstorms over warm tropical waters.
考题
单选题What occurs when rising air cools the dew point?（）A
advection fog formsB
humidity decreaseC
wind increaseD
Cloud form
考题
单选题When electrical equipment is involved in a fire，the stream of dry chemicals should be（）.A
aimed at the source of the flamesB
fogged above the equipmentC
shot off a flat surface onto the flamesD
used to shield against electrical shock
考题
单选题When must a dry chemical fire extinguisher be recharged?（）A
After each useB
When the air temperature exceeds 90°FC
Every 6 monthsD
Every 12 months
考题
单选题The type of fog that occurs on clear nights with very light breezes and forms when the earth cools rapidly by radiation is known as（）.A
Radiation fogB
Frontal fogC
Convection fogD
Advection fog
考题
单选题The fog most commonly encountered at sea is called（）.A
conduction fogB
radiation fogC
frontal fogD
advection fog
考题
单选题Advection fog may be formed by cold air passing over a（）.A
colder sea surfaceB
warmer sea surfaceC
dry coastal plainsD
high mountain or plateau
考题
单选题Advection fog is most commonly caused by（）.A
air being warmed above the dew pointB
saturation of cold air by rainC
a rapid cooling of the air near the surface of the Earth at nightD
warm moist air being blown over a colder surface
考题
单选题The dew point of air is reached when the wet bulb temperature is （）.A
Twice the dry bulb temperatureB
10℃ above the dry bulb temperatureC
5℃ above the dry bulb temperatureD
Equal to the dry bulb temperature
考题
问答题Practice 1 Heat loss by sweating depends on the fact that when a liquid evaporates, it absorbs an enormous quantity of heat from its surroundings. Therefore, when I am of sweat evaporate, a great deal of heat is absorbed from the surface of the body in contact with it. 1______ 2______ The first is the amount of movement of air surrounding the body. The second is the amount of water vapor in the air that surrounds the body. 3______ For this reason, sweat evaporates very rapidly on windy days, and the rate of heat loss by sweating is much more than on a still day. This accounts for the fact that hot still days are much less comfortable than hot windy days. In contrast, the sweat evaporates very rapidly on hot windy days, and cools the body quickly and effectively. 4______ When air is carrying the maximum amount of water vapor that it can hold, it is said to be 100% saturated with water vapor. The relative humidity of the air is said to be 100%. Under these conditions the air cannot carry any water, so no water can evaporate. When the relative humidity is high, therefore, sweat cannot evaporate. Instead, it forms large drops and runs off your skin without cooling you. 5______ It is obvious that under these conditions, evaporation will be much more rapid. Therefore, sweating will be much more effective as a method of losing heat from the body. On a hot dry day, sweat evaporates as soon as it is formed, and you feel reasonably cool even though the temperature of your environment is very high.[A] When the air is very dry and carries no water at all, the relative humidity is said to be 0%.[B] The second factor is the amount of water vapor in the air－the humidity.[C] Hot windy days are much more comfortable than hot still days.[D] This heat transfer occurs even if the environment is hotter than the body.[E] When air moves over the surface of water, the amount of evaporation is greatly increased.[F] You might expect the highest incidence of a heat stroke when the maximum temperature is 100 and humidity is 50%.[G] Two factors affect the rate of evaporation of sweat, and therefore the effectiveness of sweating as a method of cooling the body.
考题
单选题Fog forms when the air（）.A
is 50% water saturatedB
is 90% water saturatedC
temperature is greater than the dew point temperatureD
temperature is equal to，or below the dew point temperature
考题
单选题An emergence sea anchor may be constructed by type of extinguisher?（）.A
a boat bucketB
an air tank filled with waterC
an oar and canvas weighted downD
All of the above
考题
单选题Small floes of rough，hummocky sea ice capable of damaging a vessel（）.A
can usually be detected by radar in a smooth sea at a range of 4 to 6 kilometersB
are indistinguishable from sea return on the PPIC
are invisible to radar when covered with a thick layer of snowD
are usually seen at night before they are close enough to provide a radar echo
考题
单选题（）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.A
MIXING FOGB
ADVECTION FOGC
RADIATION FOGD
ARCTIC SEA SMOKE
考题
单选题Steam smoke will occur when（）.A
extremely cold air from shore passes over warmer waterB
warm dry air from shore passes over cooler waterC
cold ocean water evaporates into warm airD
cool rain passes through a warm air mass
考题
单选题Which of the listed precautions should be taken when cleaning the internals of a motor with compressed air?（）A
Open the machine on both ends so as to allow the air and dust to escapeB
Be certain that the circuit breaker is opened and tagged on the feeder panelC
Be certain that the air is clean and as dry as possibleD
All of the above
考题
单选题（）is the most widespread type likely to be encountered at sea and is caused by relatively warm air being cooled by flowing over a cooler sea surface.A
FRONTAL FOGB
MIXING FOGC
ADVECTION FOGD
RADIATION FOG
考题
单选题When occurring a fire in the scavenge air box, the following measures should be taken except for（）A
reducing speed to SLOW and asking bridge for permission to stopB
stopping the fuel oil supplyC
switching-on the auxiliary blowersD
putting the scavenge air box fire extinguishing equipment into function
考题
单选题The fog produced by warm moist air passing over a cold surface is called（）.A
conduction fogB
radiation fogC
frontal fogD
advection fog
考题
单选题When compared to air temperature,which factor is most useful in predicting fog?（）A
Vapor pressureB
Dew pointC
Barometric pressureD
Absolute humidity
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