A.two position control
B.single speed floating control
C.proportional speed floating control
D.reset control
[单选题]The control mode in which tile final control element is moved from one of two fixed positions to the other is known as______.A.dead band actionB.neutral zone actionC.rangeD.on-off action
[单选题][A] employed[B] appointed[C] interviewed[D] questioned
[主观题]H.ave you ever been employed?
[单选题]The pumps employed on board ship can be divided into two main categories ie() pumps and centrifugal pumps.A . gearB . nonpositive displacementC . positive displacementD . rotary
[单选题]alarm的意义是()。A .警告B .插入C .替换D .删除
[试题]1 Stuart is a self-employed business consultant aged 58. He is married to Rebecca, aged 55. They have one child,Sam, who is aged 24 and single.In November 2005 Stuart sold a house in Plymouth for £422,100. Stuart had inherited the house on the death o
[试题]2 Benny Korere has been employed as the sales director of Golden Tan plc since 1994. He earns an annual salary of£32,000 and is provided with a petrol-driven company car which has a CO2 emission rate of 187g/km and had alist price when new of £22,360.
[单选题]The alarm signal for engine room catching fire is a blast of random bell followed by____.A.two knocksB.three BlocksC.four knocksD.five knocks
[单选题]A.n alarm device inserted between the deaerating tank and the expansion tank can notify the on-watching crew that .A.the expansion tank is lack of waterB.the expansion tank is over flowingC.there is something wrong with the cooling systemD.there is s
[单选题]A high temperature alarm or () which will melt is used to guard against the explosion of compressor air pipelines.A . a flame trapB . a relief valveC . a fusible plugD . a bursting ca