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
The series of valves used to control the return flow in well control operations is called the（）.
In ship operations，hoisting and lowering pipe in and out of the drilled hole is the main function of the（）.
In the piping systems of a vessel，what type of valve gives the least resistance to fluid flow when fully open?（）.
The portable radio apparatus means（）.
If the engine of a survival craft does not start，check to see（）.
The rudders are amidships and both screws are going ahead. What will happen if the starboard screw is stopped?（）
Limit switches are used on which davits?（）
If a gasoline engine turns over freely but will not start，the cause is generally（）.
The bypass valve on a self-contained breathing device should be opened if（）.
The boat is stowed on the davit rather than on a cradle with which type of davit?（）