To increase the frequency of an operating AC generator, you should ()
- Aincrease the field excitation
- Bdecrease the field excitation
- Cincrease the number of magnetic poles
- Dincrease the speed of the prime mover
To increase the frequency of an operating AC generator, you should ()
1、The next-to-last shot of an anchor cab
The next-to-last shot of an anchor cable is usually painted().AwhiteBinternational orangeCyellowDred
2、The ability of an oil to separate clea
The ability of an oil to separate cleanly from an oil and water mixture is referred to as its ().Aprecipitation numberBneutralization numberCpour pointDdemulsibility
3、The frequency of an alternator is cont
The frequency of an alternator is controlled from the main switchboard by adjusting the()Afrequency meterBvoltage regulatorCgovernor controlDsychroscope switch
4、The () of an oil refers to its ability
The () of an oil refers to its ability to mix with water and then release the water in a centrifuge.Aoxidation resistanceBcarbon-forming tendencyCdemulsibilityDacidity
5、The reaction of a gyrocompass to an ap
The reaction of a gyrocompass to an applied force is known as().AprecessionBearth rateCgyroscopic inertiaDgravity effect
6、What happens to the efficiency of an a
What happens to the efficiency of an anchor when it is moved from sand to mud?()AThe efficiency increasesBThe efficiency decreasesCThe efficiency remains the sameDThe efficiency cannot be determined.