A.flow of petroleum through pipes
B.spraying or splashing of petroleum
C.settling of solids or water in petroleum
D.All of the above
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A.pump out
B.to pump out
C.pumping out
D.be pumped out
A.prevent the passage of flammable gases
B.prevent the passage of poisonous vapors
C.delay the spread of heat and flames
D.maintain watertight integrity
A.Sheath-screw davits
B.Gravity davits
C.Radial davits
D.Quadrantal davits
A.Globe valve
B.Butterfly valve
C.Gate valve
D.Packless valve
A.swivel
B.cathead spool
C.drawworks
D.stand pipe
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In ship operations，hoisting and lowering pipe in and out of the drilled hole is the main function of the（）.
An example of a messenger is a（）.
As oil pipe line connections were broken，（）quantity of oil was caused to spill onto the wharf and into the dock water.
The bypass valve on a self-contained breathing device should be opened if（）.
In nautical terminology a dog is a（）.
On a ship，a door that is required to be marked KEEP CLOSED is designed to（）.
The rudders are amidships and both screws are going ahead. What will happen if the starboard screw is stopped?（）
Each cylinder in a two stroke cycle engine experiences combustion（）.
An integral part of a blowout preventer that serves as the closing element on an open hole，and whose ends do not fit around the drill pipe but seal against each other and shut off the space below completely is the（）.
The function of the bypass valve on the self-contained breathing apparatus is to（）.