更多"The fitting that allows a boom to m"的相关试题:
[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]Our jumbo boom can（）20 tons.
A. lift
B. rise
C. elevate
D. hoist
[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]Cast iron and gunmetal fittings are used freely in small sizes at moderate pressure; large fittings, those for high pressure and temperature are cast or mild steelIn the above sentence, the word “those” means （）.
A. east iron firings
B. mild steel fittings
C. small fittings
D. large fittings
[单项选择]0ur jumbo boom can（）20 tons.
A. lift
B. rise
C. elevate
D. hoist
[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]Stress on the topping lift of a swinging boom can be reduced by（）.
A. rigging a back stay
B. raising the boom
C. increasing the mechanical advantage of the cargo purchase
D. taking all slack out of the preventer
[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]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]If a gasoline engine turns over freely but will not start，the cause is generally（）.
A. a defective ignition system
B. low lube oil level
C. weak valve springs
D. too heavy a load
[单项选择]If a diesel engine turned over freely but failed to start, the cause could be （）
A. water in the fuel
B. cold lube oil
C. excessive starting air pressure
D. excessive fuel pressure
[单项选择]The center of gravity of a freely swinging load suspended from a pedestal crane acts as if it were located at the（）.
A. counterweight
B. pedestal
C. longitudinal centerline
D. point of suspension
[单项选择]For any given pedestal crane,when the boom is lengthened, the lifing capacity is（）.
A. unchanged
B. increased
C. eliminated
D. decreased
[单项选择]The hinge fitting used to attach the boom to the mast is the（）.
A. gooseneck
B. step
C. swivel
D. pintle
[单项选择]0n a crane ,the boom indicator tells the operator what angle the boom angle is compared to the（）.
A. vertical position
B. horizontal position
C. boom stop angle
D. minimum radius angle
[单项选择]Our starboard derrick boom of hatch No.4 is badly cracked（）that it has become entirely useless.
A. at its goose neck to such a extent
B. at it's goose neck to such an extent
C. at it's goose neck for such a extent
D. at its goose neck to such an extent
