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 ISPS Code consists of a mandatory section-Part A, which shows（）
Which of the following items don’t belong to dock repair works?（）
The flash point of a residual fuel oil should be used to determine the highest temperature to which oil may be heated（）
If separating effect is not good, which measure should be taken （）
“Insufficiency of manning or insufficiency of certification of seafarers” is an identification of a（）
If two A.C.generators are to be operated in parallel, the load is distributed evenly by（）
To proceed to the assistance of a ship in distress is（）
（）connectors hold best if a wire is accidentally pulled or a connection becomes loose.
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.
（）are used to digest the sewage to produce innocuous sludge in a biological sewage treatment plant.