皮皮学，免费搜题
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搜题
【单选题】
低压电器中具有短路、过载、欠压保护的电器是( )。
A.
低压断路器
B.
低压交流接触器
C.
低压漏电保护器
D.
低压电流继电器
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举一反三
【单选题】In a closed cooling water system, which of the problems can cause the water pressure to fluctuate?
A.
An open vent in the cooling system
B.
A fouled sea chest
C.
A restricted water passage in the engine
D.
Air entrained in the cooling water
查看完整题目与答案
【多选题】多选题:能满足加工要求且不会使工件无法安装或变形的定位是( )。
A.
完全定位
B.
欠定位
C.
不完全定位
D.
过定位
查看完整题目与答案
【判断题】ROI= return on sales / capital turnover.
A.
正确
B.
错误
查看完整题目与答案
【单选题】The highest pressure in any closed diesel engine freshwater cooling system is at the _____.
A.
jacket water outlet
B.
expansion tank inlet
C.
heat exchanger inlet
D.
cooling water pump outlet
查看完整题目与答案
【判断题】Returns can only be measured in accounting terms such as return on assets, return on equity, or return on sales.
A.
正确
B.
错误
查看完整题目与答案
【判断题】Return on sales =revenue / income.
A.
正确
B.
错误
查看完整题目与答案
【单选题】If the coolant temperature of a closed cooling water system for a diesel enginegradually increases, the trouble usually is( ).
A.
a broken shaft on the freshwater pump
B.
an excessive accumulation of scale in the heat exchanger
C.
an incorrect thermostatic element operating range
D.
lube oil in the cooling water
查看完整题目与答案
【单选题】In a closed cooling system for a turbocharged, four-stroke/cycle diesel engine, fluctuating water pressure can be caused by .
A.
improper venting of the cooling system
B.
carrying the expansion tank water level too high
C.
a totally clogged impeller in the cooling water pump
D.
an incorrectly set cooling system temperature control
查看完整题目与答案
【简答题】Our sales confirmation No． BC510 in two (8) were airmailed to you． Please sign and return one copy of them for our (9) ．
查看完整题目与答案
【单选题】In any diesel engine closed freshwater cooling system, the lowest pressure exists at the _____.
A.
jacket water outlet
B.
cooling water pump outlet
C.
heat exchanger outlet
D.
expansion tank atmospheric vent
查看完整题目与答案
相关题目：
【单选题】In a closed cooling water system, which of the problems can cause the water pressure to fluctuate?
A.
An open vent in the cooling system
B.
A fouled sea chest
C.
A restricted water passage in the engine
D.
Air entrained in the cooling water
查看完整题目与答案
【多选题】多选题:能满足加工要求且不会使工件无法安装或变形的定位是( )。
A.
完全定位
B.
欠定位
C.
不完全定位
D.
过定位
查看完整题目与答案
【判断题】ROI= return on sales / capital turnover.
A.
正确
B.
错误
查看完整题目与答案
【单选题】The highest pressure in any closed diesel engine freshwater cooling system is at the _____.
A.
jacket water outlet
B.
expansion tank inlet
C.
heat exchanger inlet
D.
cooling water pump outlet
查看完整题目与答案
【判断题】Returns can only be measured in accounting terms such as return on assets, return on equity, or return on sales.
A.
正确
B.
错误
查看完整题目与答案
【判断题】Return on sales =revenue / income.
A.
正确
B.
错误
查看完整题目与答案
【单选题】If the coolant temperature of a closed cooling water system for a diesel enginegradually increases, the trouble usually is( ).
A.
a broken shaft on the freshwater pump
B.
an excessive accumulation of scale in the heat exchanger
C.
an incorrect thermostatic element operating range
D.
lube oil in the cooling water
查看完整题目与答案
【单选题】In a closed cooling system for a turbocharged, four-stroke/cycle diesel engine, fluctuating water pressure can be caused by .
A.
improper venting of the cooling system
B.
carrying the expansion tank water level too high
C.
a totally clogged impeller in the cooling water pump
D.
an incorrectly set cooling system temperature control
查看完整题目与答案
【简答题】Our sales confirmation No． BC510 in two (8) were airmailed to you． Please sign and return one copy of them for our (9) ．
查看完整题目与答案
【单选题】In any diesel engine closed freshwater cooling system, the lowest pressure exists at the _____.
A.
jacket water outlet
B.
cooling water pump outlet
C.
heat exchanger outlet
D.
expansion tank atmospheric vent
查看完整题目与答案