更多"Areas which cannot be scanned by th"的相关试题:
[单项选择]AREAS WHICH CANNOT BE SCANNED BY THE RADAR OF THE VESSEL BECAUSE THEY ARE SHIELDED BY PARTS OF ITS SUPERSTRUCTURE，MASTS，ETC means（）.
A. Blind sectors
B. Sheltered area
C. Unseen area
D. Unscanable area
[单项选择]Which of the following radar contacts will present the most immediate danger?（）.
A. A vessel on the starboard bow whose bearing is changing and range is decreasing
B. A vessel on the starboard bow whose bearing is steady and range is increasing
C. A vessel on the port bow whose bearing is steady and range is decreasing
D. A vessel on the port bow whose bearing is changing to the left and range decreasing
[单项选择]Which general statement concerning radar is FALSE?（）.
A. Raising the antenna height increases the radar range
B. The ability of radar to detect objects is unaffected by weather conditions
C. Radar bearings are less accurate than radar ranges
D. Radar should be checked regularly during clear weather to ensure that it is operating properly
[单项选择]Which statement concerning the operation of radar in fog is TRUE?（）
A. Radar ranges are less accurate in fog
B. Navigation buoys will always show up on radar
C. A sandy beach will show up clearer on radar than a rocky cliff
D. Small wooden boats may not show up on radar
[单项选择]Which condition indicates that your radar needs maintenance?（）
A. Serrated range rings
B. Indirect echoes
C. Multiple echoes
D. Blind sector
[单项选择]A radar display which is oriented，so that north is always at the top of the screen，is called a(n)（）.
A. relative display
B. composite display
C. stabilized display
D. unstabilized display
[单项选择]A radar display in which North is always at the top of the screen is a(n)（）.
A. unstabilized display
B. stabilized display
C. composition display
D. relative display
[单项选择]You are using a radar in which your own ship is shown at the center，and the heading flash always points to 0°. If bearings are measured in relation to the flash，what type of bearings are produced?（）.
A. Relative
B. TRUE
C. Compass
D. Magnetic
[单项选择]Your radar is set on a true motion display.Which of the following will NOT appear to move across the PPI scope（）.
A. Echoes from a buoy
B. Own ship's marker
C. Echo from a ship on the same course at the same speed
D. Echo from a ship on a reciprocal course at the same speed
[单项选择]Which space cannot be deducted from gross tonnage when calculating net tonnage（）.
A. Crew messroom
B. Forepeak ballast tank
C. Master's cabin
D. Chain locker
[单项选择]Which message categories cannot be disabled by the GMDSS radio operator（）.
A. Navigational Warnings
B. Meteorological Warnings
C. Search and Rescue Information
D. All of the above
[单项选择]The oil residues which cannot be discharged into the sea in compliance with MARPOL 73/78 shall be（）.
A. discharged to into special area
B. discharged into national waters
C. discharged into the designated zone
D. retained on board or discharged to reception facilities
[单项选择]After finished the engine, which of valves cannot be shut off by the duty engineer?（）
A. fuel valve
B. the starting air valve
C. the sea chest
D. the main sea pump inlet valve
[单项选择]Buoys which mark dredging areas are painted（）.
A. black
B. yellow
C. green
D. red
[单项选择]Which of the listed fire extinguishers cannot be easily recharged aboard ship?（）
A. Soda acid
B. Carbon dioxide
C. Dry chemical
D. Cartridge-operated Foam
[多项选择] Into which two types of areas would an area border router (ABR) inject a default route?（）
A. stub
B. the autonomous system of an exte rior gateway protocol (EGP)
C. NSSA
D. totally stubby
E. the autonomous system of a different interior gateway protocol (IGP)
F. area 0
[单项选择]In which of the areas listed would you expect to find the highest salt concentration in a flash evaporator?（）
A. Distiller air ejector cooling medium
B. Saltwater heater discharge
C. First-stage internal feed box
D. Second-stage internal feed box
[单项选择]In which of the areas listed is a fire resulting from spontaneous combustion most likely to occur?（）
A. Engine room bilges
B. Paint locker
C. Battery storage locker
D. Fuel oil tank
