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
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相关考题
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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 -
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 -
单项选择题
What is the proper first aid for LPG in the eye? （）
A.Apply an ice pack to the eye
B.Keep the eyelid closed
C.Flush the eye with plenty of water
D.Rub the eye area clean
