單項選擇題Which of the listed items will stop a motor due to a reduction in voltage and restart it when the voltage is restored to normal?()

A.Low voltage protection circuit
B.Non-renewable link fuse
C.Renewable link fuse
D.Low voltage release circuit


您可能感興趣的試卷

你可能感興趣的試題

1.單項選擇題Which of the following statements concerning a simple parallel resistance circuit is correct?()

A.The voltage drop across each resistor is the same
B.The total current flow equals the reciprocal of the sum of the individual currents
C.The total resistance equals the sum of the individual resistances
D.The total voltage equals the sum of the individual voltages across each resistance

2.單項選擇題A ground in an electrical circuit outside the engine room ().

A.cannot be detected tinder normal conditions
B.is of no consequence to engineering personnel
C.is indicated at the branch circuit breaker panel
D.is indicated by the ground detecting lamps on the main switchboard

3.單項選擇題Grease coatings on electrical contact surfaces increase contact resistance and should be removed with a/an ().

A.small wire brush
B.compressed air jet
C.clean dry cloth
D.10% solution carbon solvent and water

4.單項選擇題Aboard ship, a grounded field coil in an AC motor can be determined by using a ().

A.portable growler
B.galvanometer
C.visual inspection
D.megohmmeter

5.單項選擇題A generator is prevented from becoming motorized by the use of a/an ().

A.over-speed trip
B.reverse power relay
C.back pressure trip
D.governor controls

最新試題

If separating effect is not good, which measure should be taken ()

題型:單項選擇題

One of the reasons that cause oil flowed from sludge outlet of a self-cleaning separator is()

題型:單項選擇題

Which of the listed governor characteristics will greatly affect the load sharing relationship between paralleled diesel generators?()

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 shipboard oil pollution emergency plan will be invalid after ()

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

Which of the diesel engine components listed increase air density and helps to improve engine operating efficiency?()

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

()are used to digest the sewage to produce innocuous sludge in a biological sewage treatment plant.

題型:單項選擇題

Diesel engine air start system check valves are opened by ()

題型:單項選擇題