更多"The crane is usually mounted on a p"的相关试题:
[单项选择]Most pedestal crane power is provided by（）.
A. Electro-hydraulic units
B. Steam units
C. Independent internal combustion power units
D. All of the above
[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]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]Pedestal cranes have limit switches to restrict movement of which function（s）（）.
A. Hoist upper & lower limits
B. Luff travel limits
C. Rider block hoist upper & lower limits
D. All of the above
[单项选择]Which action(s) should the operator of a pedestal crane take if crane control is lost?（）
A. Let go of both control levers and return to neutral position
B. Press the emergency stop
C. Notify the mate on watch
D. All of the above
[单项选择]Which action（s）should the operator of a pedestal crane take if crane control is lost （）.
A. Let go of both control levers and return to neutral position
B. Press the emergency stop
C. Notify the mate on watch
D. All of the above
[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]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 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
[单项选择]The crane manufacturer’s operating tables are posted near the（）.
A. crane pedestal
B. wire-rope locker
C. main deck
D. crane controls
[单项选择]In a general cargo crane, three principal movements are （）； （）； （）.
A. hoisting；luffing；slewing
B. lifting；raising；lowering
C. rotating；raising；handling
D. hosting；lowering；moving
[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]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 thumb pointing downward and flex fingers in and out
C. With forearm vertical and forefinger pointing up，move hand in small horizontal 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 stop in an emergency?（）
A. Extend arm with the palm down and hold this position rigidly
B. Place clasped hands in front of your body
C. Extend arm and move hand rapidly right and left with the palm down
D. Place both fists in front of the body with the thumbs pointing outward
[单项选择]How should you signal the crane operator to dog everthing?（）.
A. Place both fists in front of the body with the thumbs pointing outward each other
B. Clasp hands in front of your body
C. Extend arm with the palm down and and hold this position rigidly
D. Extend arm with the thumb pointing up, and flex the finger s in and out
