There is a danger of the starting current that the windings

In a modern three-phase A.C. synchronous brushes generator, the excitation winding is on the rotor. That means .

A.The generator need not excitation.

B.The winding on the rotor is for inputting excitation current.

C.There are three phase windings on the rotor.

D.The generator has no brushes.

Which of the following components are used to convert alternating current produced in the generator windings to direct current?

A.Armature and equalizer

B.Commutator and brushes

C.Rotor and interpoles

D.Field and exciter

A、inductive

B、capacitive

C、resistive

D、reactive

The lifeboat releasing gear lever should be marked with the words ______．

A.DANGER，DO NOT TOUCH

B.DANGER，BOAT MAY DROP

C.DANGER，LEVER RELEASES BOAT

D.DANGER，LEVER DROPS BOAT

In an operating diesel engine, which of the following conditions is an indication of a leaking air starting valve?

A.Noise coming from that air starting valve

B.Continuous operation of the starting air compressor

C.Zero air pressure in the air starting system

D.Overheated starting air pipe to the cylinder head

All the following is true except that ______．

A.in many places a counter current flows in opposition to the main current close to the bank

B.current can vary with depth of water and large deep draught ships can experience different current effects at differing parts of the hull tend to turn to the wind

C.as speed is reduced，the increased proportion of the ship's vector which is attributable to current will set the ship close to obstructions

D.when close to the berth in a head current，there is a danger that flow inshore of the ship becomes restricted and the ship is subject to interactive forces

A.much initial current

B.direct current

C.little initial current

D.constant current