An occluded front is caused by a(n) ______.A.low pressure areaB.high pressure areaC.area of calm airD.cold front overtaking a warm front
An occluded front is caused by a(n) ______.
A.low pressure area
B.high pressure area
C.area of calm air
D.cold front overtaking a warm front
相关考题：
Cumulonimbus clouds are most likely to accompany a(n) ______.A.high pressure systemB.cold frontC.warm frontD.occluded front
In the following statements about the principle of the low level controlling, which is WRONG? 0 A.Low level is monitored on the drain tank and header tank.B.If there is high differential the filters pressure across the circulatingpumps is alarmedC.The lubricating oil purifier cannot take oil from the drain tankD.If the sea water pressure falls, this also operates an alarm
A smoking exhaust from an operating diesel engine could be caused by( ).A.low sulfur content in the fuelB.a loose injector inlet connectionC.late fuel injectionD.high injection pressure
Fog is most commonly associated with a(n) ______.A.warm front at nightB.low pressure areaC.anticycloneD.lack of frontal activity
What is TRUE of pressure/vacuum valves?A.They are designed to provide for the flow of small volumes of tank atmospheres caused by thermal variations in a cargo tankB.They should operate in advance of the pressure/vacuum breakersC.They should be kept in good working order by regular inspection and cleaningD.All of the above
Vehicle operators should ______ the chassis to take pressure（caused by the tension of the lashing）off the springs．A.braceB.lashC.block upD.secure
The vapor pressure of a gas is the pressure necessary to keep it in a（n）______．A.Soluble stateB.Solid stateC.Liquefied stateD.Inert state
What alarm is NOT found on an inert gas system ________．A.Low oxygen alarmB.Low pressure alarmC.Scrubber high water level alarmD.Deck seal low water alarm
A generally circular low pressure area is called a(n)______．A.cycloneB.anticycloneC.cold frontD.occluded front
Clouds appearing in the following order: cirrus, cirrostratus, altostratus, stratus, and nimbostratus usually indicate the approach of a(n) ______.A.warm frontB.occluded frontC.medium frontD.cold front
Good weather is usually associated with a region of ______.A.low barometric pressureB.high barometric pressureC.falling barometric pressureD.pumping barometric pressure
单选题Steady precipitation is typical of（）.Acoming cold weather conditionsBa warm front weather conditionChigh pressure conditionsDscattered cumulus clouds
单选题Steady precipitation is typical of（）．AComing cold weather conditionsBA warm front weather conditionCHigh pressure conditionsDScattered cumulus cloudsduring the day
单选题In the Northern Hemisphere，gusty winds shifting clockwise，a rapid drop in temperature，thunderstorms or rain squalls in summer (frequent rain/snow squalls in winter) then a rise in pressure followed by clearing skies，indicate the passage of a(n)（） .Awarm frontBtropical cycloneCanticycloneDcold front
单选题Your facsimile prognostic chart indicates that you will cross the cold front of a low pressure system in about 24 hours.You should（）.AExpect to see cirrus clouds followed by altostratus and nimbostratus cloudsBAlter course to remain in the navigable semicircleCPrepare for gusty winds，thunderstorms，and a sudden wind shiftDExpect clear weather，with steady winds and pressure，until the front passes
单选题The vapor pressure of a gas is the pressure necessary to keep it in a(n)（）.Asoluble stateBsolid stateCliquefied stateDinert state
单选题In the Northern Hemisphere，an area of counterclockwise wind circulation surrounded by higher pressure is a（）.AlowBhighCwarm frontDcold front
单选题An occluded front is usually caused by a（）.Acold front becoming stationaryBwarm front becoming stationaryCcold front overtaking a warm frontDwarm front dissipating
单选题An occluded front is caused by a(n)（）.Alow pressure areaBhigh pressure areaCarea of calm airDcold front overtaking a warm front
单选题The height of a tide can be increased by（）.AA storm surgeBA high pressure areaCThe jet streamDA cold front
单选题On the approach of a warm front the barometric pressure usually（）.AfallsBrisesCis steadyDis unreliable
单选题In the Northern Hemisphere，winds veering sharply to the west or northwest with increasing speed are indications that a（）.Acold front has passedBlow pressure center is approachingCstationary front existsDhigh pressure center has passed
单选题Fog is most commonly associated with a(n)（）.Awarm front at nightBlow pressure areaCanticycloneDlack of frontal activity
单选题A generally circular low pressure area is called a(n)（）.AcycloneBanticycloneCcold frontDoccluded front
单选题If an observer in the Northern Hemisphere faces the surface wind，the center of low pressure is to his（）.Aleft，slightly behind himBright，slightly behind himCleft，slightly in front of himDright，slightly in front of him
单选题Excessively low air pressure occurring in the intercooler of a reciprocating air compressor is caused by（）.Aleaky discharge valves on the LP cylinderBleaky discharge valves on the HP cylinderCinsufficient intercooler coolingDlow ambient air pressure
单选题What is TRUE of pressure/vacuum valves? （）AThey are designed to provide for the flow of small volumes of tank atmospheres caused by thermal variations in a cargo tankBThey should operate in advance of the pressure/vacuum breakersCThey should be kept in good working order by regular inspection and cleaningDAll of the above