A.Switches
B.panels
C.alarm units
D.safety devices
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A.deteriorates
B.increases
C.are fouled
D.becomes better
A.varying the D-Cexciter voltage
B.varying the reluctance of the air gap
C.regulating the speed of prime mover
D.shorting out part of the armature windings
A.short circuit
B.speed up
C.slow down
D.hunting
A.live
B.dead
C.excited
D.on line
A.Feed back
B.Negative feed back
C.Close loop
D.Open loop
最新試題
The condensers located in various stages of a flash evaporator are cooled by（）
Thermostatic steam pressure reducing valves are used in the fuel oil service system to control the（）
The Port State Control officer may witness a fire drill carried out by the crew assigned to these duties on the（）
Which of the following items don’t belong to dock repair works?（）
For a given exhaust gas boiler, what is the quantity of its evaporation mainly determined?（）
Which of the diesel engine components listed increase air density and helps to improve engine operating efficiency?（）
The additional mark （）in the Classification Certificate for Machinery means propulsion apparatus is remotely controlled on the navigating bridge control station, and engine assembly control station is unmanned periodically.
The flash point of a residual fuel oil should be used to determine the highest temperature to which oil may be heated（）
Using a file without a handle may result in （）
If two A.C.generators are to be operated in parallel, the load is distributed evenly by（）