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Power transformers are rated in _____.

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more efficiently uses available engine power  operates at a lower efficiency at a fixed speed  produces the same torque at lower engine power  develops its rated power at a lower speed  
How often will Transformers4 be shown    whether Transformers4 will show    How Transformers4 will be shown    When will Transformers4 show  
During operation at low speed  During operation at rated speed, but low power output  During acceleration  All of the above  
must    need    may    can’t  
It consumes no excitation power  It has current transformers  Components are needed for accurate compounding  Its excitation system is vulnerable to voltage variations  
It makes up five per cent of all electricity consumption in the United States.  Electrical devices that have internal or external clocks consume standby power.  Standby power is not of significance compared to the whole consumption of electricity.  Standby power is important to maintain the normal functions of electrical devices.  
connected load  prime mover speed  field excitation  generators rated voltage  
3-5 watts  13-30 watts  300-700 watts  It depends.  
100 kW  400 kW  500 kW  600 kW  
power output  friction and wear  indicated pressure  rated horsepower  
they have a vision from the mountaintop  they have warm feelings and emotions  they can serve as concrete examples of noble principles  they can make people feel stronger and more confident  
they carl recharge their batteries that have been exhausted.  they do not interfere with the normal use of electricity in the house.  their users do not have to bother to turn them on every time they want to use them.  they can stay warmed up and are ready for use at any moment.  
800 kW  5120 kW  6400 kW  4180 kW  
Supportive  Critical  Indifferent  Worrie  
when the engine RPM is pulled down by overload  at rated engine RPM  at 95 % of rated engine RPM  at 95 % of a properly adjusted governor RPM with the engine under full load  
the electricity thief who steals electricity at one’s home.  electricity to power electrical appliances even when they are turned off.  electricity to power electrical appliances when they are turned on.  electricity waiting to be used when electrical appliances are turned of  
have seen    see    will see    had seen  
connected load  prime mover speed  field excitation  generators rated voltage  

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