單項(xiàng)選擇題The connected joints of pipe，usually made of three joints of pipe approximately 90 feet long，racked in the derrick when making a trip are called a（）.

A.string
B.stand
C.joint
D.standpipe


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1.單項(xiàng)選擇題The C02 flooding system is actuated by a sequence of steps which are（）.

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

2.單項(xiàng)選擇題The bypass valve on a self-contained breathing device should be opened if（）.

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

3.單項(xiàng)選擇題The boat is stowed on the davit rather than on a cradle with which type of davit?（）

A.Crescent
B.Sheath-screw boom
C.Quadrantal
D.Radial

4.單項(xiàng)選擇題Static electricity may be built up by the（）.

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

5.單項(xiàng)選擇題Permission is kindly requested（）the ballast water.

A.pump out
B.to pump out
C.pumping out
D.be pumped out