A.Use one hand to give any motion signal，and place the other hand motionless in front of the hand giving the motion signa
B.Extend arm with the thumb pointing up，and flex the fingers in and out for as long as the load movement is desired
C.First tap your elbow with one hand and then proceed to use regular signals
D.First tap the top of your head with your fist and then proceed to use regular signals
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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
A.With forearm vertical and forefinger pointing up，move hand in small horizontal circles
B.With arm extended downwards and forefinger pointing down，move hand in small horizontal circles
C.Extend arm with fingers closed and thumb pointing upward
D.Place both fists in front of body with the thumbs pointing upward
A.exposure to inclement weather conditions
B.carelessness
C.the use of improper gear
D.moisture caused by condensation
A.Keep the loads as close to the rail or deck as possible
B.If cargo is likely to settle，make provisions to secure it after it has settled
C.Thoroughly secure and shore all cargo so that it cannot move
D.hen stowing cargo，avoid leaving empty paces
A.Running rigging leading aft from the masts
B.Running rigging leading forward from the masts
C.Standing rigging leading aft from the masts
D.Standing rigging from the cross trees to the mast head
最新試題
What is/are the advantage（s）of cranes over conventional cargo booms（）.
Official draft measurements should be（）by authorized persons，agreed by both parties involved.
Regulations concerning the stowage，lashing，and securing of timber deck cargoes aboard general cargo vessels may be found in the（）.
What is meant by the term“l(fā)uffing the boom”of a crane（）．
Which statement is FALSE concerning a tagline as used with a 30-ton pedestal crane（）.
When discharging oil from an oil tanker the instantaneous rate（）60 liters per nautical mile.
How should you signal the crane operator to lower the boom and raise the load（）.
Which of the following statement（s）is/are TRUE regarding a twin pedestal crane set（）.
If an attempt is made to hoist a load that exceeds the capacity of an electric winch，an overload safety device causes a circuit breaker to cut off the current to the winch motor（）.
When instructing a crew member concerning the right way to lift a weight，you would instruct him to（）.