A.a closed loop control system
B.an open loop control system
C.a boiler control system
D.a steering gear control system
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A.a manual closed loop
B.a manual opened loop
C.an automatic closed loop
D.an automatic opened loop
A.the absolute pressure
B.the gauge pressure
C.the vacuum pressure
D.the differential pressure
A.measured
B.recorded
C.transferred
D.controlled
A.a current will flow
B.a power will develop
C.a heat will flow
D.a pressure will produce
A.Reverse current protection
B.Reverse power protection
C.Synchronising device
D.Frequency meter
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