更多"If the towing bridle legs are not o"的相关试题:
[单项选择]An ocean towing bridle whose legs are of equal length，but too short，may（）.
A. fail to provide spring in the hawser
B. cause unequal distribution of the load to one leg
C. cause the bridle legs to jump clear of the chocks or fairleads
D. None of the above
[单项选择]The biggest problem encountered when towing bridle legs are too short is（）.
A. retrieval
B. adjusting tension
C. excessive strain
D. hookup to main towline
[单项选择]An ocean towing bridle should（）.
A. have equal legs of sufficient length
B. have a large angle between the legs
C. be formed on a bight of cable through a ring
D. never be made up of chain
[单项选择]The MINIMUM acceptable size for a towing bridle would be that size in which the safe working load (SWL) of each leg of the bridle is equal to（）.
A. one-half the SWL of the main towing hawser
B. three-fourths the SWL of the main towing hawser
C. that of the main towing hawser
D. twice that of the main towing hawser
[单项选择]The choice of length of tow bridle legs is governed by the（）.
A. expected towing forces
B. capability of retrieving gear
C. freeboard of the unit being towed
D. need to reduce yaw
[单项选择]A power driven vessel when towing and the length of the tow exceeds 200 meters shall exhibit during daylight hours where they can best be seen which of the following shapes? （）
A. a diamond shape
B. two cones，apexes together
C. a black ball
D. one cone，apex upward
[单项选择]A chain bridle is used when towing astern because it（）.
A. Is easy to connect
B. Provides an effective catenary and absorbs shock due to its weight
C. Makes rigging a swivel unnecessary
D. Prevents the tow from yawing by the drag of the chains in a seaway
[单项选择]A chain bridle is preferable to a wire rope towing bridle on a long ocean tow because chain （）.
A. is more flexible and has the ability to absorb shock because of its weight
B. is less subject to wear and damage from abrasion
C. requires little maintenance
D. All of the above
[单项选择]A towing vessel 30 meters in length is pushing barges ahead. How many white masthead lights is the vessel REQUIRED to show at night?（）
A. One
B. Two
C. Three
D. Four
[单项选择]A towing vessel becomes tripped while towing on a hawser astern. What factor is MOST important when assessing the risk of capsizing? （）
A. Length of the towline
B. Height of the towline connection
C. Longitudinal position of the towline connection
D. Direction of opposing force
[单项选择]To reduce stress on the towing hawser when towing astern (ocean tow)，the hawser should be （）.
A. secured to the aftermost fitting on the towing vessel
B. just touching the water
C. underwater
D. as short as possible
[单项选择]A towing light（）.
A. flashes at regular intervals of 50-70 flashes per minute
B. is yellow in color
C. shows an unbroken light over an arc of the horizon of not less than 180°nor more than 225°
D. All of the above
[单项选择]Fire protection regulations for towing vessels require all crew members to know how to perform each of these tasks EXCEPT（）.
A. start the mechanical ventilation system for the engine room
B. operate the fuel shut-off for the engine room
C. operate all fire extinguishing equipment aboard the vessel on board the vessel，including starting the fire pump
D. All of the above
