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When a vessel is stationary and in a hogging condition，the main deck is under ______．
A.Compression stress
B.Tension stress
C.Shear stress
D.Racking stress
参考答案
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单选题Your vessel has a midships engine room and the cargo is concentrated in the end holds．The vessel is（）.A
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sagging with compressive stress on main deckC
hogging with tensile stress on main deckD
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单选题Once a vessel has loaded packaged hazardous cargo，the cargo spaces shall be inspected. The spaces shall also be inspected at least once in every 24 hours. The only exception to daily inspection is when（）.A
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the cargo hatches are of steel constructionC
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information of such condition from yourselfB
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单选题When cargo is shifted from the main deck into the lower hold of a vessel，（）.A
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单选题When a vessel is stationary and in a hogging condition，the main deck is under（）.A
compression stressB
tension stressC
shear stressD
racking stress
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单选题When cargo is shifted from the main deck into the lower hold of a vessel,（）.A
The metacenter will move downwardB
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单选题When a vessel is in dry-dock, the vessel’s engineers should （）.A
examine the condition of the propellerB
chip and paint all hull protection zincsC
install new docking plugs in all cofferdamsD
inspect the hull for hogging or sagging
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单选题When lowering lifeboats in heavy seas，a good practice is to rig frapping lines（）.A
on only the forward fallsB
on only the after fallsC
with a lead of about 45 degrees to the boatD
from the falls to the main deck of the vessel
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单选题A cofferdam is（）.A
any deck below the main deck and above the lowest deckB
a member that gives fore-and-aft strengthC
made by placing two bulkheads a few feet apartD
a heavy fore-and-aft beam under the deck
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