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【简答题】
下面图是一台电机正反转的电气原理图。 1 .请指出该电路中具有几种保护,并写明相应的电器元件。 2 .分析该电路的工作原理。
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举一反三
【单选题】我某外贸企业于某月10日向斯里兰卡发邮件,限15日复到有效,对方于14日发邮件 接受通知,由于邮件服务器的故障,该外贸企业等到16日才完整收到接受邮件,事后该外贸企业并未表态,那么( )
A.
除非发盘人及时提出异议，否则，该逾期接受仍具有效力
B.
该逾期接受丧失接受效力，合同不成立
C.
只有发盘人毫不迟疑地表示确认，该通知才具有接受效力，否则合同不成立
D.
只有发盘人发出接受通知，合同才成立
【单选题】If the exhaust gas temperature of the incinerator is too high, or if sparks are developed, what should you do?
A.
Close the inlet and outlet valves for diesel oil
B.
Open the air nozzles in the secondary combustion chamber until it stops
C.
Open the air nozzles in the primary combustion chamber until it stops
D.
Close inlet valve for the pressurized air.
【单选题】Operation of Detroit's trash incinerator, the largest in the nation, was halted last month, less than a year after it was put into service. The huge plant, which was designed to change waste into ener...
A.
There was too much trash.
B.
It was unhealthy.
C.
It was unable to convert waste into energy.
D.
It could not be regulated.
【单选题】If there is coming dark smoke out of the stack of the incinerator, what should you do?
A.
Open the air nozzles in the primary combustion chamber until it stops
B.
Open the air nozzles in the secondary combustion chamber until it stops
C.
Closc thc inlet and outlet valves for diesel oil
D.
Close inlet valve for the pressurized air.
【单选题】The furnace of an incinerator should be _____before the auxiliary burner is lit.
A.
heated
B.
cleared of air
C.
purged
D.
cleared of water
【单选题】在CD光盘上标记有CD-RW字样,RW标记表明该光盘是
A.
只能写入一次，可以反复读出的一次性写入光盘
B.
可多次擦除型光盘
C.
只能读出，不能写入的只读光盘
D.
其驱动器单位速为1350KB/S的高密度可读写光盘
【单选题】During incinerating, an incinerator vibrates excessively. Which of the following causes maybe correct?
A.
Too much water in the furnace
B.
Bad atomization
C.
Too much air in the fumace
D.
Sludge temperature is too high
【单选题】After passing through the turbine the exhaust gas is conduced out into the______.
A.
incinerator
B.
cylinder
C.
compressor
D.
open air
【单选题】When an incinerator goes out suddenly, the ____ supply should be shut off quickly
A.
Fuel
B.
Sludge
C.
Air
D.
Fuel and sludge
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