更多"Special thrust devices are provided"的相关试题:
[单项选择]A thrust bearing is used with a propulsion diesel engine to （）.
A. control axial movement of the crankshaft
B. transmit engine thrust to the propeller shaft
C. absorb vibrations in the propeller shafting
D. prevent propeller thrust from being transmitted to the hul
[单项选择]Attempts are made to eliminate axial thrust in centrifugal pump by （）.
A. providing the impeller with balancing holes
B. the use of symmetrical impeller
C. neither A nor B
D. either A or B
[单项选择]A thrust block is designed to（）.
A. transmit the thrust of the engine to the propeller
B. transmit the thrust of the propeller to the vessel
C. absorb the shock of wave pressure at the bow
D. be placed between the engines and the foundation to absorb the vibration
[单项选择]What is the function of the thrust bearing?（）
A. Prevents lateral movement of the slow speed gear
B. Transmits propeller thrust to the hull
C. Keeps spring bearings in line
D. Prevents main reduction gear axial movement
[单项选择]The thrust from the propeller to the hull of the ship is transferred by（）
A. tie rod
B. thrust block
C. bedplate of main engine
D. frame of main engine
[单项选择]（） thrust and resistance equal each other, the ship always travels at a constant speed.
A. As long as
B. As far as
C. As well as
D. Unless
[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]With a given load on the cargo hook，the thrust on a cargo boom（）.
A. increases as the angle to the horizontal increases
B. increases as the angle to the horizontal decreases
C. is greatest at an angle of 45° and decreases as the boom is raised or lowered
D. is least at an angle of 45° and increases as the boom is raised or lowered
[单项选择]The order “Bow thrust stop” means “（）”.
A. Bow thrust full to pert
B. Bow thrust full to starboard
C. No bow thrust revolutions
D. No stern thrust revolutions
[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
[单项选择]Ships carrying 15 or more seafarers and engaged in a voyage of more than three day’s duration shall provide separate hospital accommodation to be used（）.
A. for other purposes
B. exclusively for medical purposes
C. for a common ship‟s office
D. by deck and engine departments
[单项选择]It is required that ships proceeding at sea should keep continuous watch on（）.
A. VHF channels 16 and 13
B. Appropriate DSC distress and safety frequencies
C. INMARSAT TDM message channel
D. VHF channel 70 and channel 8
[单项选择]When engaged on international voyages, ships of 1600 tons gross tonnage and upwards shall be fitted with a（）.
A. radio direction-finding apparatus
B. DSC
C. NAVTEX
D. EPIRB
[单项选择]Several merchant ships are arriving at the scene of a distress incident. One of the them must assume the duties of the Coordinator Surface Search (CSS). Which of the following statements is TRUE? （）
A. CSS duties are always assumed by passenger vessels，dry cargo vessels，or tankers in that order of precedence
B. The CSS must be established by mutual agreement between the ships concerned
C. A tank vessel should never be assigned CSS duties unless only tank vessels are present
D. The first vessel to arrive at the distress incident is designated as the CSS
