更多"Equal power factors on paralleled A"的相关试题:
[单项选择]When the prime movers of two paralleled generators are equipped with mechanical- hydraulic governors, and are operating within their designed range, the unit with the least amount of speed droop will （）.
A. pick up more of any increase in load
B. pick up less of any increase in load
C. share an equal amount of any increase in load
D. drop an equal amount of any decrease in load
[单项选择]When paralleled, AC generators must have the same （）
A. frequency
B. number of phases
C. phase rotation
D. All of the above
[单项选择]When two AC generators are being paralleled, the breaker should be closed with the synchroscope pointer mating in the （）
A. "slow" direction, just before the 12 o'clock position
B. "fast" direction, just after the 12 o'clock position
C. "fast" direction, just before the 12 o'clock position
D. "slow" direction, just after the 12 o'clock position
[单项选择]The power factor of an AC generator operating singularly is determined by the （）
A. connected load
B. prime mover speed
C. field excitation
D. generators rated voltage
[单项选择]The power factor at which a paralleled AC generator operates is usually adjusted by the （）.
A. connected load
B. prime mover speed
C. field excitation
D. generators rated voltage
[单项选择]A3、Ac3、Ar3中温度最低的是（）
A. A3
B. Ac3
C. Ar3
D. 不确定
[判断题]设置电源通电自启动需将AC Power Loss Restart设置为Enabled。
[判断题]垄断竞争市场上长期均稀的条件是：MR=MC=AR=AC。
[单项选择]In comparison to electric power，hydraulic power for jacking systems has the advantage of（）.
A. better control capabilities
B. less maintenance and repair
C. fewer personnel needed during jacking
D. less preload needed
[单项选择]One of the factors which affects the circulation of ocean currents is（）.
A. humidity
B. varying densities of water
C. vessel traffic
D. the jet stream
[单项选择]Which of the following factors tends to increase scale formation on the saltwater side of a heat exchanger used in a diesel engine cooling water system?（）
A. Baffle plates that have been bent during prior removal
B. Leaks in the cooler tube nest
C. Operating the engine while maintaining a high sea water outlet temperature
D. A punctured sea water strainer supplying cooling water to the heat exchanger
[单项选择]Which of the factors listed has the greatest effect on the mechanical efficiency of a diesel engine?（）
A. temperature of the intake air
B. friction within the engine
C. mechanical condition of the supercharger
D. mechanical condition of the turbocharger
[单项选择]One of the factors limiting the amount of load which can be put on a modern marine diesel engine is the （）
A. governor sensitivity
B. exhaust temperature
C. fuel injection pressure
D. speed of the can shaft
[单项选择]The Rules state that certain factors are to be taken into account when determining safe speed. One of the factors is the（）.
A. radio communications that are available
B. maximum speed of your vessel
C. temperature
D. current
[单项选择]MR＝MC＝AR＝AC是哪一种市场上的厂商长期均衡条件？（）
A. 完全竞争市场
B. 垄断竞争市场
C. 寡头垄断市场
D. 完全垄断市场
[单项选择]AR—3460、AR—4460光谱的WinOE软件主菜单由（）个部分组成。
A. 3
B. 4
C. 5
D. 6
[单项选择]The same factors push wages and prices up together, the one（）the other.
A. emphasizing
B. multiplying
C. increasing
D. reinforcing
