更多"Stress on the topping lift of a swi"的相关试题:
[单项选择]Our jumbo boom can（）20 tons.
A. lift
B. rise
C. elevate
D. hoist
[单项选择]0ur jumbo boom can（）20 tons.
A. lift
B. rise
C. elevate
D. hoist
[单项选择]The maximum theoretical stress that can be developed on a guy in a yard and stay rig is limited by the（）.
A. lifting capacity of the winch
B. location of the boom
C. position of the guy
D. weight of the load
[单项选择]Structural stress on a ship can be reduced by（）.
A. lessening the effect of environmental forces
B. even and symmetrical variable loading
C. local concentration of heavy consumables
D. increasing the metacentric height
[单项选择]Linda, can you give me a lift after work? （）
A. It‘s very kind of you to do so.
B. Thank you for your offer.
C. Never mind. I‘ll go shopping.
D. No problem. We go the same direction
[简答题]集装箱船舶吊装卸作业方式（Lift on/Lift off system）有何优点？
[单项选择]A boom vang（）.
A. holds the boom down and flattens the main sail
B. draws the head of the sail to windward
C. tautens the standing rigging
D. douses the gaff topsail
[单项选择]A cargo boom is a（）.
A. double sized mattress consists of more than 890 coils
B. spar extending from a mast or a king post
C. flap（Becker rudder）can be fitted to the rudder’s trailing edge
D. bridle arrangement having a long beam of the length of the container
[单项选择]The boom stops are installed on an offshore crane to（）.
A. prevent the boom from being raised too high
B. prevent the boom from swinging
C. support the boom when not in use
D. prevent the boom from being lowered
[单项选择]The boom indicator tells the operator at what angle the boom is compared to the（）.
A. horizontal position of the boom
B. vertical position of the boom
C. horizontal position of the load being lifted
D. vertical position of the load being lifted
[单项选择]The process of lowering a boom to a horizontal position and onto its deck support is called（）.
A. spotting a boom
B. collaring a boom
C. cradling a boom
D. toppling a boom
[单项选择]What is meant by spotting the boom?（）
A. Lowering it into a cradle
B. Placing it in a desired position
C. Spotting it with wash primer and red lead
D. Two-blocking it
[单项选择]The boom stops on a pedestal crane prevent the boom from（）.
A. being raised too high
B. swinging at sea
C. overloading when not in use
D. being lowered too low
[单项选择]The fitting that allows a boom to move freely both vertically and laterally is called the （）.
A. swivel
B. lizard
C. spider band
D. gooseneck
[单项选择]Boom Box爆炸机开机的操作是（）
A. 向中间扳动ARM
B. 同时扳动ARM+CHARGE
C. 扳动CHARGE
D. 接通电源自动开机
[单项选择]When evacuating a seaman by helicopter lift，which course should the ship take?（）
A. Downwind so that the apparent wind is close to nil
B. A course that will keep a free flow of air，clear of smoke，over the hoist area
C. A course that will have the hoist area in the lee of the superstructure
D. With the wind dead ahead because the helicopter is more maneuverable when going into the wind
[单项选择]当选择LIFT-DUMP位时（）
A. 襟翼放出到75度，减速板放出超过正常位置
B. 襟翼保持在45度，减速板放出超过正常位置，
C. 襟翼和减速板都放出到75度
D. 以上全不正确
