A.string
B.stand
C.joint
D.standpipe
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A.break glass，pull valve，break glass，pull cylinder control
B.sound evacuation alarm，pull handle
C.open bypass valve，break glass，pull handle
D.open stop valve，open control valve，trip alarm
A.you are entering a space containing poisonous vapors
B.you are entering a space containing explosive gases
C.the regulator of the breathing apparatus malfunctions
D.the face piece of the breathing device is too tight
A.Crescent
B.Sheath-screw boom
C.Quadrantal
D.Radial
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
A.pump out
B.to pump out
C.pumping out
D.be pumped out
最新試題
Each cylinder in a two stroke cycle engine experiences combustion（）.
The exhaust pipe must be gas tight throughout its entire length otherwise（）.
As oil pipe line connections were broken，（）quantity of oil was caused to spill onto the wharf and into the dock water.
The function of the bypass valve on the self-contained breathing apparatus is to（）.
Permission is kindly requested（）the ballast water.
In relation to cargo gear，what does SWL mean?（）.
In the piping systems of a vessel，what type of valve gives the least resistance to fluid flow when fully open?（）.
The rudders are amidships and both screws are going ahead. What will happen if the starboard screw is stopped?（）
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（）.
An example of a modern anchor which has a stock is a(n)（）.