单项选择题Atmospheres laden with coal dust or grain dust caused by loading these cargoes().

A.require loading operations to be shut down until the atmosphere clears
B.are toxic to human life
C.are subject to spontaneous combustion
D.may be explosive in some concentrations


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1.单项选择题A venetian vent or rice ventilator is used in stowage of which cargo?().

A.Bagged cargo
B.Bulk grain
C.Bulk rice
D.Refrigerated goods

2.单项选择题A grapnel is a().

A.device for securing a chain topping lift
B.hook to prevent the anchor cable from slipping
C.device used to drag for a submerged cable or line
D.type of clam bucket used for discharging bulk cargo

3.单项选择题A deck beam does NOT().

A.act as a beam to support vertical deck loads
B.lessen the longitudinal stiffness of the vessel
C.act as a tie to keep the sides of the ship in place
D.act as a web to prevent plate wrinkling due to twisting action on the vessel

4.单项选择题()are to be used for dunnage if you load rice.

A.wooden planks
B.rush mats
C.steel bars
D.wooden planks and rush mats

5.单项选择题When loading a cargo of taconite,proper sequencing of loading by hatch number is necessary to ().

A.provide the proper trim
B.prevent negative stability from developing
C.prevent excessive longitudinal stresses
D.control list

6.单项选择题Prior to being able to sail in a US port,each vessel that carries grain in bulk must have a certificate of loading issued by the().

A.American Bureau of Shipping
B.Lloyds of London
C.National Cargo Bureau
D.US Salvage

7.单项选择题Assuming an even transverse distribution of weight in a vessel,which condition could cause a list?().

A.Empty double-bottoms and lower holds,and a heavy deck cargo
B.Flooding the forepeak to correct the vessel's trim
C.Having KG smaller than KM
D.Having a small positive righting arm

8.单项选择题Bulk cargo refers to().

A.cargo which occupies a large volume of space
B.cargo which requires refrigeration
C.cargo which is very dense
D.homogeneous cargo not enclosed in a container

9.单项选择题If a vessel takes a sudden severe list or trim from an unknown cause,you should FIRST().

A.determine the cause before taking countermeasures
B.assume the shift is due to off-center loading
C.counterflood on the side opposite the list or trim
D.assume the cause is environmental forces

10.单项选择题The disinfection of various compartments in a vessel by filling them with a gaseous agents to destroy rats etc.means().

A.fire drills
B.washing and cleaning
C.fumigation
D.quarantine