更多"An ocean towing bridle whose legs a"的相关试题:
[单项选择]If the towing bridle legs are not of equal length().
A. excessive strain is placed on the shorter leg
B. the shorter leg may fail
C. the longer leg is slack
D. All of the above
[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 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]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]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] int len = strlen(s),如果s=‛hell‛,则 len =()
A. 4
B. 5
C. s的首地址
D. 0
[单项选择]表达式Abs(len(str(123.667))-Len(str(-2.000005)))的值是()。
A. 0
B. 2
C. 1
D. -1
[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]All inspected vessels on unrestricted ocean routes must have equipment on board for testing an individual’s().
A. blood
B. breath
C. urine
D. All of the above
[单项选择]
A crankshaft whose center of gravity coincides with its center line is said to be()
Ⅰ.statically balanced
Ⅱ.dynamically balanced
A. Ⅰ only
B. Ⅱ only
C. both Ⅰ and Ⅱ
D. neither Ⅰ nor Ⅱ
[多项选择]OCEAN信令仪具有以下功能()
A. A口数据采集与分析
B. Abis口数据采集与分析
C. GB口数据采集与分析
D. QOS测试
E. 实时监视
[单项选择]The satellites over the major ocean regions cover the globe().
A. besides the polar regions
B. including the North Pole and the South Pole
C. above 70N and below 70S
D. as far north and south 70