A.Transducer
B.Reducer
C.Transformer
D.Rectifier
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A.magnetic shield
B.electromagnet
C.piezoelectric device
D.electromagnetic domain
A.Sealed motors
B.Drip proof motors
C.Enclosed motors
D.Watertight motors
A.both meters in series with the resistance
B.both meters in parallel with the resistance
C.the ammeter in series and the voltmeter in parallel with the resistance
D.the ammeter in parallel and the voltmeter in series with the resistance
A.open circuit
B.short circuit
C.polarized ground
D.ground reference point
A.Contactors control current and relays control voltage
B.A relay is series connected and a contactor is parallel connected
C.Contactors can handle heavier loads than relays
D.Contactors are made from silver and relays are made from copper
最新試題
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.
During the diesel engine running, the water level of F.W expansion tank should normally kept in the （） level of glass tube.
If two A.C.generators are to be operated in parallel, the load is distributed evenly by（）
One of the reasons that cause oil flowed from sludge outlet of a self-cleaning separator is（）
Which of the listed governor characteristics will greatly affect the load sharing relationship between paralleled diesel generators?（）
The condensers located in various stages of a flash evaporator are cooled by（）
Using a file without a handle may result in （）
If separating effect is not good, which measure should be taken （）
（） is not installed on the main switchboar.
Which of the diesel engine components listed increase air density and helps to improve engine operating efficiency?（）