A.portable growler
B.galvanometer
C.visual inspection
D.megohmmeter
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A.over-speed trip
B.reverse power relay
C.back pressure trip
D.governor controls
A.Impedance
B.Current
C.Resistance
D.Voltage
A.Frequency meter
B.Ammeter
C.Voltmeter
D.All of the above
A.thousandth (10 to the-3rd power)
B.millionth (10 to the-6th power)
C.billionth (10 to the-9th power)
D.trillionth (10 to the-12th power)
A.Current and voltage may be in phase
B.Current may lead the voltage
C.Current may lag the voltage
D.All of the above
最新試題
The treatment of the fuel oils involves storage, heating, filtering and（）
（） is not installed on the main switchboar.
For a given exhaust gas boiler, what is the quantity of its evaporation mainly determined?（）
The flash point of a residual fuel oil should be used to determine the highest temperature to which oil may be heated（）
（）are used to digest the sewage to produce innocuous sludge in a biological sewage treatment plant.
By comparing the exhaust gas temperature of each cylinder, the operator can determine if the load is balanced throughout the engine. The device most commonly used is a（）
Thermostatic steam pressure reducing valves are used in the fuel oil service system to control the（）
Which of the listed governor characteristics will greatly affect the load sharing relationship between paralleled diesel generators?（）
“Insufficiency of manning or insufficiency of certification of seafarers” is an identification of a（）
During the diesel engine running, the water level of F.W expansion tank should normally kept in the （） level of glass tube.