更多"When hoisting a boat on gravity typ"的相关试题:
[单项选择]You are operating a lift boat.When beginning to jack down you should（）.
A. Jack down one leg at a time
B. Jack up first，then down
C. Undog doors to the engine room
D. Assemble all personnel on the main deck
[单项选择]Limit switches on gravity davits should be tested by（）.
A. the engineers，from a panel in the engine room
B. shutting off the current to the winch
C. pushing the switch lever arm while the winch is running
D. All of the above
[单项选择]When communicating on the radiotelephone using plain English，what procedure word indicates the end of my transmission and that a response is necessary? （）
A. Out
B. Over
C. Roger
D. Wilco
[单项选择]When using horizontal sextant angles of three objects to fix your position，an indeterminate position will result in which situation（）.
A. The objects lie in a straight line
B. The vessel is inside of a triangle formed by the objects
C. The vessel is outside of a triangle formed by the objects
D. A circle will pass through your position and the three objects
[单项选择]The falls on gravity davits are（）.
A. manila
B. nylon
C. wire
D. All of the above
[单项选择]Many sheath-screw davits have markings to indicate the maximum angle to which they should be cranked out. If the angle is exceeded，the davit（）.
A. may jam against the stops
B. will not automatically position the boat at the embarkation station
C. screw may come out of the sheath
D. will chafe against the falls and may cause their failure
[单项选择]When navigating using DGPS（Differential Global Positioning System）you may expect your position to be accurate to within a radius of（）.
A. 10 meters
B. 20 meters
C. 50 meters
D. 100 meters
[单项选择]The boat was sailing to the north when a terrible strom（）.
A. was breaking
B. broke out
C. would break out
[单项选择]Limit switches are used on which davits?（）
A. Sheath-screw davits
B. Gravity davits
C. Radial davits
D. Quadrantal davits
[单项选择]When using slings，cargo handlers should take all the following precautions except（）.
A. Ensure that slings are securely fastened around the load
B. Avoid careless winch operations，especially when handling fragile cargo
C. Exercise care when using hooks，crowbars，and similar tools
D. Keep the loads as close to the rail or deck as possible
[单项选择]Frapping lines are fitted to lifeboat davits to（）.
A. secure the lifeboat in the davits when in the stowed position
B. bring the lifeboat close along the rali in the embarkation position
C. give the occupants a safety line when the boat is being lowered from the embarkation level
D. reduce the swinging of the lifeboat at the embarkation level
[单项选择]When using carbon dioxide to fight a fire on a bulkhead，the CO2 should be applied（）.
A. first to the bottom of the flaming area，sweeping from side to side，and following the flames upward
B. in a circular motion from the middle of the bulkhead outward
C. to the top of the flaming area，sweeping from side to side，and working toward the bottom
D. in an up-and-down motion from one side of the bulkhead to the other
[单项选择]When using a high-velocity fog stream in a passageway，the possibility of a blow back must be guarded against. Blow back is most likely to occur when（）.
A. pressure builds up in the nozzle which causes a surge of water
B. the only opening in a passageway is the one from which the nozzle is being advanced
C. pressure in the fire hose drops below 100 psi
D. a bulkhead collapses due to heat and pressure
[单项选择]When using an ARPA，what should you consider in order to evaluate the information displayed?（）
A. The target vessel's generated course and speed are based solely on radar inputs
B. Navigational constraints may require a target vessel to change course
C. The trial maneuver feature will automatically determine a course that will clear all targets
D. You cannot determine if a small target has been lost due to sea return
[单项选择]When configuring Frame Relay using point-to-point subinterfaces, which of the following must not be configured?（）
A. The local DLCI on each subinterface of the Frame Relay.
B. The Frame Relay encapsulation on the physical interface.
C. An IP address on the physical interface.
D. The subinterface type as point-to-point
[单项选择]What’s the advantage when using the satellites?（）
A. The message can be directed to the desired location
B. The message can follow the earth’s curvature
C. The quality of message can not be affected by climatic
D. The range of the message extend and the quality of reception is improved
[单项选择]When using the term limber system one is referring to a（）.
A. Cleaning system
B. Drainage system
C. Strengthening system
D. Weight reduction system
[单项选择]When using a Lambert conformal chart in high latitudes，angles such as bearings are measured in reference to （）.
A. the meridian through the object of the bearing
B. the meridian through the ship's position
C. the meridian midway between the ship and the object
D. any meridian
