單項選擇題What type of rotor is used in split-phase motors?()

A.Dram
B.Salient pole
C.Squirrel-cage
D.Wound-rotor


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1.單項選擇題The load sharing characteristics of two diesel generator operating in parallel are mostly dependent on their governor ().

A.load limit settings
B.idle speed settings
C.speed limit settings
D.speed droop settings

2.單項選擇題The first requirement for logical troubleshooting of any system is the ability to ().

A.collect all available data on a casualty
B.recognize normal operation
C.identify the probable cause of a symptom
D.isolate the faulty component

3.單項選擇題An electrical device which employs a stationary armature and a rotating electromagnetic field is used aboard ship as a ().

A.magnetic amplifier
B.ship’s service alternator
C.three-wire DC generator
D.saturable core reactor

4.單項選擇題As a general rule, the first troubleshooting action to be taken in checking faulty electric control devices is to ().

A.draw a one line diagram of the circuitry
B.test all fuses and measure the line voltage
C.take megger readings
D.insulate the apparatus from ground

5.單項選擇題A circuit breaker differs from a fuse in that a circuit breaker ().

A.melts and must be replaced
B.is enclosed in a tube of insulating material with metal ferrules at each end
C.gives no visual indication of having opened the circuit
D.trips to break the circuit and may be reset

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The shipboard oil pollution emergency plan will be invalid after ()

題型:單項選擇題

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.

題型:單項選擇題

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

題型:單項選擇題

The ISPS Code consists of a mandatory section-Part A, which shows()

題型:單項選擇題

Using a file without a handle may result in ()

題型:單項選擇題

Refrigerant entering the compressor of a refrigeration system should be in which of the following conditions?()

題型:單項選擇題

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()

題型:單項選擇題

Thermostatic steam pressure reducing valves are used in the fuel oil service system to control the()

題型:單項選擇題

Which one is NOT the ‘clear grounds’ for a more detailed inspection?()

題型:單項選擇題

The main purpose of port State control is not to()

題型:單項選擇題