A.Transducer
B.Reducer
C.Transformer
D.Rectifier
您可能感興趣的試卷
你可能感興趣的試題
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
()connectors hold best if a wire is accidentally pulled or a connection becomes loose.
Under MARPOL Code the ship to which it applies has to carry ()
The cetane rating of diesel fuel is an indication of the ()
Refrigerant entering the compressor of a refrigeration system should be in which of the following conditions?()
()are used to digest the sewage to produce innocuous sludge in a biological sewage treatment plant.
Flame failure in an automatically fired auxiliary boiler can from a/an ()
If separating effect is not good, which measure should be taken ()
When does auxiliary burner of incinerator put into operation? ()Ⅰ. start incinerator when it is coldⅡ. the sludge for dealing with is littleⅢ. the sludge for dealing with is largeⅣ. the water and impurity in sludge are too muchⅤ. the temperature in incinerator is lowⅥ. dealing with little solid rubbish
() is not installed on the main switchboar.
The ISPS Code consists of a mandatory section-Part A, which shows()