单选题After the boat is at the top of the davit heads，the davit arms begin moving up the tracks and are stopped by the（）.Ahoist manBlimit switchCbrake handleDpreventer bar
单选题
After the boat is at the top of the davit heads，the davit arms begin moving up the tracks and are stopped by the（）.
A
hoist man
B
limit switch
C
brake handle
D
preventer bar
参考解析
解析：
暂无解析
相关考题：
If a davit-launched liferaft aboard a ship cannot be launched because of damage to the davit，you should ______.A.inflate the liferaft on deckB.roll the liferaft over the sideC.go to another liferaft stationD.get a saw and cut the liferaft free
While cranking out a quadrantal davit，slippage of the quadrant due to excessive wear or failure of the teeth in the quadrant will cause the ______．A.Davit arm to pivot on the traveling nut and the head to fall outboardB.Traveling nut to lock up in place on the worm gearC.Limit switch to engage and hold the traveling nut in positionD.Winch brake to lock in position and prevent lowering the boat
The most common type of davit found on merchant vessels today is the ______．A.RadialB.Sheath-screwC.GravityD.Quadrantal
Which davit type may be operated by one man ________．A.QuadrantalB.GravityC.Sheath-screwD.Radial
Which type of davit is not considered to be a mechanical davit ________．A.Sheath-screw boomB.RadialC.CrescentD.Quadrantal
If a davit-launched life raft aboard a vessel cannot be launched because of damage to the davit, you should ______.A.inflate the life raft on deckB.roll the life raft over the sideC.go to another life raft stationD.get a saw and cut the life raft free
In launching a lifeboat, when should the tricing pendants be released?______.A.Before the boat is lowered from the stowage positionB.As soon as the boat-fall blocks clear the davit headC.After the limit switch is activatedD.After all people have been embarked
Start the （）(艇机), drive the boat from the ship quickly.A、boat engineB、davit motorC、main engineD、fire boat
单选题A mechanical davit is designed to automatically（）.Aposition the boat at the embarkation stationBlift the boat off the inboard chocksCenergize the winch for the fallsDset the brake on the winch
单选题On which type davit does the davit head stay at the same height?（）ARadialBSheath-screwCQuadrantalDGravity
单选题The boat is stowed on the davit rather than on a cradle with which type of davit?（）ACrescentBSheath-screw boomCQuadrantalDRadial
单选题The type of davit on which you must turn a crank in order to swing the lifeboat out over the ship’s side is a（）.Asheath-screw davitBgravity davitCradial davitDbruckner davit
单选题In launching a lifeboat，when should the tricing pendants be released?（）.ABefore the boat is lowered from the stowage positionBAs soon as the boat-fall blocks clear the davit headCAfter the limit switch is activatedDAfter all people have been embarked
单选题When launching a lifeboat，the tricing pennants should be released（）.Abefore the boat is lowered from the stowed positionBas the boat-fall blocks break clear of the davit headCbefore the boat is lowered from the embarkation levelDafter the boat is released into the water
单选题If a davit-launched life raft aboard a vessel cannot be launched because of damage to the davit，you should（）.Ainflate the life raft on deckBroll the life raft over the sideCgo to another life raft stationDget a saw and cut the life raft free
单选题If a davit-launched liferaft aboard a ship cannot be launched because of damage to the davit，you should（）.Ainflate the liferaft on deckBroll the liferaft over the sideCgo to another liferaft stationDget a saw and cut the liferaft free
单选题When hoisting a boat on gravity type davits using an electric motor driven winch，the davit arms should be brought up（）.Ato their final position with the winch operating at slow speedBto the bar stop，and then hand cranked to their final positionCuntil just before they make contact with the limit switch，and then hand cranked to their final positionDto the embarkation deck，and then hand cranked to their final position
单选题Many sheath-screw davits have markings to indicate the maximum angle to which they should be cranked out. If the angle is exceeded，the davit（）.Amay jam against the stopsBwill not automatically position the boat at the embarkation stationCscrew may come out of the sheathDwill chafe against the falls and may cause their failure
单选题The davit launched life raft can be boarded（）.Afrom the water onlyBat the deckCby jumping down onto itDthrough the escape tube
单选题What is required to launch a boat stowed in a crescent davit?（）AHoist the boat clear of the cradleBRelease the outboard part of the cradleCRig the tricing linesDCrank the crescent out
单选题While cranking out a quadrantal davit，slippage of the quadrant due to excessive wear or failure of the teeth in the quadrant will cause the（）.ADavit arm to pivot on the traveling nut and the head to fall outboardBTraveling nut to lock up in place on the worm gearCLimit switch to engage and hold the traveling nut in positionDWinch brake to lock in position and prevent lowering the boat
单选题On open lifeboats，the purpose of the wire stretched between the davit heads is to（）.Akeep the movement of the davits at the same speedBkeep the davits from slipping when they are in the stowed positionCprevent vibration during lowering of the boatDsupport the manropes
单选题When launching a lifeboat in the rough sea, the davit gears should be released（）.Abefore the boat is lowered from the stowed positionBas the boat fall blocks break clear of the davit headCbefore the boat is lowered from the embarkation levelDafter the boat is released into the water
单选题The pivot pin at the base of a sheath-screw boom davit must be（）.Ainserted each time before the booms are cranked outBperiodically removed for inspection and lubricatedCreplaced at each inspection for certificationDin the locked position after the boat is cradled and griped down