更多"Ships are always（）on water and they"的相关试题:
[单项选择]Ships are always（）on water and they are easy to rust.
A. float
B. floating
C. floats
D. floated
[单项选择]Oil water separators are used to ensure that ships dont discharge oil when pumping out （）.
A. ballast water
B. boiler water
C. bilge water
D. sewage water
[单项选择]Before the oily water is installed on board ships, it must have （）
A. IOPP
B. type approval certificate
C. cargo ship safety equipment certificate
D. cargo ship safety certificate
[单项选择]It is not always easy to tell the right（）the wrong.
A. from
B. with
C. than
D. to
[单项选择]When distilling salt water the cooling water discharging from the distiller is fed back to evaporator as feed water （）.
A. to cut down the amount of cooling water needed
B. to prevent an excess amount of cooling water from being discharged to the bilges
C. to supply hot water to the evaporator for more economical operation
D. None of the above is tree
[单项选择]When distilling sea water the cooling water discharging from the distiller is fed back to evaporator as feed water （）.
A. to decrease scale formation
B. for better cooling effect
C. for more economical purpose
D. to raise vacuum
[单项选择]A water pump can not supply water after startingIt may be caused by （）.
A. closed discharge valve
B. broken pipe line
C. worn shaft
D. both A and B
[单项选择]After stopping oily water separator, sea water should be permitted for （） minutes,（）should be closed after stopping pump to reduce oxidation corrosion of inner wall.
A. 15；inlet value
B. 15；inlet and outlet value
C. 30；inlet value
D. 30；inlet and outlet value
[单项选择]Ships equipped with Inmarsat SES send distress alerts both（）.
A. quick and good
B. convenient and certain
C. easily and simply
D. important and difficult
[单项选择]Commercial ships or other persons or agencies requiring the assistance of Canadian Coast Guard icebreakers should first contact（）.
A. the Canadian Coast Guard
B. Ice Sarnia
C. the Ice Navigation Center
D. the icebreaker assigned to the area
[单项选择]Ships changing their location within the port limits are also required to report their new （）.
A. bearings
B. distances
C. sections
D. positions
[单项选择]The water level showing in a boiler water gauge glass is usually （） during working.
A. higher than the actual drum water level
B. equal to the actual drum water level
C. increasing due to steam condensation in the glass
D. lower than actual drum water level
[单项选择]The fresh water generator produces fresh water （）.
A. by cooling sea water
B. by heating sea water
C. by evaporation of sea water
D. by purifying sea water
[单项选择]It is required that ships proceeding at sea should keep continuous watch on（）.
A. VHF channel16 and 13
B. appropriate DSC distress and safety frequency
C. INMARSAT TDM message channel
D. VHF channel 70 and channel 8
[单项选择]It is possible for ships to receive safety message transmitted by Navtex station（）.
A. in any INMARSAT regions
B. in each NAVTEX area
C. at any distance
D. in Areas A3 and A4
[单项选择]Ships’ masters are requested to ensure that during their call at this port , all discharging outlets are（）.
A. blockaded
B. opened
C. closed
D. enclosed
