名词解释题BLAST
名词解释题
BLAST
参考解析
解析：
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相关考题：
A jack-up drilling unit elevated on the Outer Continental Shelf must have a fog horn that will sound ______.A.a 2-second blast every 20 secondsB.a 4-second blast every 20 secondsC.an 8-second blast every 30 secondsD.a 10-second blast every 30 seconds
单选题You are underway and approaching a bend in the channel where vessels approaching from the opposite direction cannot be seen．You should sound（）.Aone blast，4 to 6 seconds in durationBthree blasts，4 to 6 seconds in durationCone continuous blast until you are able to see around the bendDone blast，8 to 10 seconds in duration
单选题In general, the oil mist defectors include a base plate with air blast pumpThe function of air blast pump is to （）crankcase.Asupply clean air to the measuring compartment of the units for more accuracyBgeneraate the pressure required for the extraction of the oil mist from theCgenerate the pressure required for the extraction of the oil mist from the crankcaseDsupply clean air to the measuring track of the units for more accuracy
单选题Your vessel is approaching a bend. You hear a prolonged blast from around the bend. You should （）.Aback your enginesBstop your engines and driftCanswer with one prolonged blastDsound the danger signal
单选题You are Master of a towing vessel engaged in towing three barges astern.The middle barge of the tow would be required to sound which of the following during restricted visibility （）.ANo fog signalBA prolonged blast at intervals never to exceed more than two minutesCA prolonged blast followed by two short blasts at intervals never to exceed more than two minutesDA prolonged blast followed by three short blasts at intervals never to exceed more than one minute
单选题The alarm signal for engine room catching fire is a blast of random bell follow by （）Atwo knockBthree knocksCfour knocksDfive knocks
单选题Traditionally，the signal for fire aboard ship is（）.Amore than 6 short blasts and 1 long blast on the whistle，and the same signal on the general alarmBcontinuous sounding of the ship's whistle and the general alarm for at least 10 secondsC1 short blast on the whistleDalternating short and long blasts on the ship's whistle
单选题Which of the following represents the emergency signal for fire aboard ship?（）AMore than six short blasts and one long blast on the whistleBContinuous blast of the ships whistle for a period of not less than 10 seconds supplemented by the same signal on the general alarmCThree short blasts of the whistle supplemented by the same signal on the general alarmDMore than six short blasts and one long blast on the whistle supplemented by the same signal on the general alarm
单选题When whistle signals are used for launching lifeboats，one short blast means（）.Ause the float-free method onlyBlower all boatsCraise all boatsDdrill is over，secure all boats
单选题The abandon ship signal sounded by the vessels whistle is （）.A6 short blasts and 1 long blastBlong blast mare than 6 short blastsCmore than 6 short blasts and 1 long blastD1 long blast of at least 10 seconds
单选题A sound signal of seven short blasts and one long blast given with the vessel’s sound system is（）.ASafety alarmBDistress alarmCFire drill alarmDGeneral emergency alarm
单选题A vessel sounding a fog signal of one short，one prolonged，and one short blast is indicating that the vessel is（）.AfishingBin distressCat anchorDnot under command
单选题A vessel sounds one short blast. This signal indicates the vessel（）.Aintends to alter course to starboardBintends to pass starboard to starboardCis altering course to starboardDintends to pass port to port
单选题A whistle signal of one prolonged，one short，one prolonged and one short blast，is sounded by a vessel（）.Aat anchorBtowing a submerged objectCbeing overtaken in a narrow channelDin distress
单选题The term PROLONGED BLAST refers to（）.Aa blast of from five to seven seconds' durationBa blast of from five to six seconds' durationCa blast of from four to six seconds' durationDa blast of from six to seven seconds' duration
问答题BLAST套件的blastn、blastp、blastx、tblastn和tblastx子工具的用途什么？