单项选择题
A.the Matitime Code of China B.Certificate of Inspection C.Oil Transfer Procedures Manual D.IOPP Certificate
What will NOT increase friction of a liquid flowing in ...
单项选择题What will NOT increase friction of a liquid flowing in a pipe and cause a loss of suction head?（）.
A.Bends in the piping B.Slowing the pumping rate C.Pipeline valves D.Backing rings for pipe welds
What normally helps in detecting escaping gas? （）A.Runn...
单项选择题What normally helps in detecting escaping gas? （）
A.Running hand along pipe B.Red flame C.Odor D.Increase the line pressure
What is used to test a tank for oxygen content?（）A.Comb...
单项选择题What is used to test a tank for oxygen content?（）
A.Combustible gas indicator B.Vapor indicator C.Atmosphere analyzer kit D.None of the above
