A.the tank ceiling B.the tank top bushing C.the thievage mark D.an above deck datum
A.deck B.head of the boom C.heel of the boom D.mast or king post
A.Two to four feet by the bow B.Slightly by the bow C.No trim should be permitted D.Slightly by the stern
A.On top of No.1 hatch B.Beside the hatches，forward of the midships house C.On top of the hatch immediately forward of the midships house D.On top of the hatch immediately aft of the midships house
A.main string B.push string C.power string D.face string
A.hold a valid officer's license for inspected vessels B.be a certificated tankerman C.be 30 years old D.have a letter from the company stating his qualification
A.all of the parts，dividing the load equally B.the hauling part because it must absorb the frictional losses of all the sheaves C.the parts in the movable block D.the standing part because it is directly connected to the weight
A.to the base of the foremast B.to the forward-most bitts C.to the forward part of the deckhouse D.at the stern
A.from areas equipped with power ventilation B.only from enclosed areas free from sources of vapor ignition C.from the open deck D.from within the vessel
A.leaks in the ship's refrigeration system B.improper cleaning of the cargo spaces C.carriage at the wrong temperature D.improper precooling of the cargo spaces
