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The safe working load for the assembled cargo gear and the minimum angle to the horizontal for which the gear is designed shall be marked on the ______．
A.deck
B.head of the boom
C.heel of the boom
D.mast or king post
参考答案
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is least at an angle of 45° and increases as the boom is raised or lowered
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decreases as the boom's angle to the horizontal decreases
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单选题The safe working load for the assembled cargo gear and the minimum angle to the horizontal for which the gear is designed shall be marked on the（）.A
deckB
head of the boomC
heel of the boomD
mast or king post
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yearB
two yearsC
four yearsD
five years
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