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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
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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
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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
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The most common type of davit found on merchant vessels today is the ______．A.RadialB.Sheath-screwC.GravityD.Quadrantal
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Which davit type may be operated by one man ________．A.QuadrantalB.GravityC.Sheath-screwD.Radial
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Which type of davit is not considered to be a mechanical davit ________．A.Sheath-screw boomB.RadialC.CrescentD.Quadrantal
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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
考题
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
考题
Start the （）(艇机), drive the boat from the ship quickly.A、boat engineB、davit motorC、main engineD、fire boat
考题
单选题A mechanical davit is designed to automatically（）.A
position the boat at the embarkation stationB
lift the boat off the inboard chocksC
energize the winch for the fallsD
set the brake on the winch
考题
单选题On which type davit does the davit head stay at the same height?（）A
RadialB
Sheath-screwC
QuadrantalD
Gravity
考题
单选题The boat is stowed on the davit rather than on a cradle with which type of davit?（）A
CrescentB
Sheath-screw boomC
QuadrantalD
Radial
考题
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（）.A
sheath-screw davitB
gravity davitC
radial davitD
bruckner davit
考题
单选题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
考题
单选题When launching a lifeboat，the tricing pennants should be released（）.A
before the boat is lowered from the stowed positionB
as the boat-fall blocks break clear of the davit headC
before the boat is lowered from the embarkation levelD
after the boat is released into the water
考题
单选题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
考题
单选题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
考题
单选题When hoisting a boat on gravity type davits using an electric motor driven winch，the davit arms should be brought up（）.A
to their final position with the winch operating at slow speedB
to the bar stop，and then hand cranked to their final positionC
until just before they make contact with the limit switch，and then hand cranked to their final positionD
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考题
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（）.A
may jam against the stopsB
will not automatically position the boat at the embarkation stationC
screw may come out of the sheathD
will chafe against the falls and may cause their failure
考题
单选题The davit launched life raft can be boarded（）.A
from the water onlyB
at the deckC
by jumping down onto itD
through the escape tube
考题
单选题What is required to launch a boat stowed in a crescent davit?（）A
Hoist the boat clear of the cradleB
Release the outboard part of the cradleC
Rig the tricing linesD
Crank the crescent out
考题
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（）.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
考题
单选题On open lifeboats，the purpose of the wire stretched between the davit heads is to（）.A
keep the movement of the davits at the same speedB
keep the davits from slipping when they are in the stowed positionC
prevent vibration during lowering of the boatD
support the manropes
考题
单选题When launching a lifeboat in the rough sea, the davit gears should be released（）.A
before the boat is lowered from the stowed positionB
as the boat fall blocks break clear of the davit headC
before the boat is lowered from the embarkation levelD
after the boat is released into the water
考题
单选题The pivot pin at the base of a sheath-screw boom davit must be（）.A
inserted each time before the booms are cranked outB
periodically removed for inspection and lubricatedC
replaced at each inspection for certificationD
in the locked position after the boat is cradled and griped down
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