更多"The boom indicator on a crane will "的相关试题:
[单项选择]0n a crane ,the boom indicator tells the operator what angle the boom angle is compared to the（）.
A. vertical position
B. horizontal position
C. boom stop angle
D. minimum radius angle
[单项选择]For any given pedestal crane，when the boom is lengthened，the lifting capacity is（）.
A. unchanged
B. increased
C. eliminated
D. decreased
[单项选择]The boom indicator tells the operator at what angle the boom is compared to the（）.
A. horizontal position of the boom
B. vertical position of the boom
C. horizontal position of the load being lifted
D. vertical position of the load being lifted
[单项选择]The boom stops are installed on an offshore crane to（）.
A. prevent the boom from being raised too high
B. prevent the boom from swinging
C. support the boom when not in use
D. prevent the boom from being lowered
[单项选择]When a cargo boom or crane is rated at varying capacities，there will be a table at the controls which relates safe working load to（）.
A. winch speed
B. boom strength
C. load radius
D. cable strength
[单项选择]The boom stops on a pedestal crane prevent the boom from（）.
A. being raised too high
B. swinging at sea
C. overloading when not in use
D. being lowered too low
[单项选择]A boom vang（）.
A. holds the boom down and flattens the main sail
B. draws the head of the sail to windward
C. tautens the standing rigging
D. douses the gaff topsail
[单项选择]The design specifications for cranes and crane foundations on ship’s are set and published by the（）.
A. American Society of Mechanical Engineers
B. American Petroleum Institute
C. Society of Petroleum Engineers
D. American Society of Civil Engineers
[单项选择]Which statement comparing a shipboard crane to conventional gear is TRUE（）.
A. Cranes are more difficult to secure for sea
B. The spotting area of the conventional gear is larger
C. A crane operator requires more training than the winch operator of a yard and stay rig
D. The yard and stay rig is more flexible in its ability to handle a wider variety of cargoes
[单项选择]Bilge soundings indicate（）.
A. the amount of condensation in the hold
B. whether the cargo is leaking or not
C. whether the vessel is taking on water
D. All of the above
[多项选择]使用gprs indicator caculator可以（）
A. TBF建立和释放情况
B. 数据流量统计
C. 小区GPRS拥塞统计
D. GPRS指标历史趋势统计
[单项选择]A combination combustible gas and oxygen indicator is an instrument that measures the（） of both combustible gas and oxygen; each is indicated on a separate meter.
A. purifies
B. combinations
C. concentrations
D. filters
[名词解释]土壤指示植物 indicator plant of soil
[单项选择]The signal man assisting a crane operator has his arm extended with his fingers closed and thumb pointing upward. This is the signal to（）.
A. raise the boom
B. raise the hook
C. raise the boom and hook
D. check the boom stop
[单项选择]How should you signal the crane operator to lower the boom and raise the load?（）.
A. Extend arm and point finger in the direction to move the boom
B. Extend arm with the thumb pointing downward and flex fingers in and out
C. With f rearm vertical and forefinger pointing up,move hand in small horizond circles
D. With arm extended downwards and forefinger pointing down,move hand in small horizontal circles
[单项选择]How should you signal the crane operator to raise the boom?（）.
A. Extend arm with the thumb pointing up and flex the fingers in and out
B. Place both fists in front of the body with the thumbs pointing upward
C. With forearm vertical and forefinger pointing up,move hand in small horizond circles
D. Extend arm with the fingers closed and thumb upward
