题目内容
(请给出正确答案)
[主观题]
The control mode in which the final control element is moved from one of two flexed positi
ons to the other is known as _____.
A.dead band action
B.neutral zone action
C.range
D.on-off action
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A.dead band action
B.neutral zone action
C.range
D.on-off action
第1题
A.expansion valve to overfeed
B.compressor to knock
C.water regulating valve to fail
D.crankcase drains to plug
第2题
A.Two derricks
B.A derrick and a crane
C.Two cranes
D.A crane and a winch
第3题
A.density
B.bore
C.weight
D.material
第4题
A.boiling and cavitations; low temperature
B.boiling and cavitations; pressurized
C.leaking and boiling; low temperature
D.leaking and boiling; pressurized
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