题目内容

Which wire rope purchases may be used with a 30-ton pedestal crane ________．

A. Hoist
B. Luff
C. Rider block
D. All of the above

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Which tanker discharge pattern would be the safest and most efficient ________．

A. Empty the forward tanks and start working aft，emptying each tank in sequence
B. Start discharging with most of the discharge coming from forward，but include some from midships and after tanks
C. Start pumping from forward，midships，and aft with the discharge distributed equally among the tanks
D. Start pumping from midships and then work forward and aft simultaneously as the midships tank is emptied

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